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NASA’s Role in Inspiring Teachers and Youth

NASA, created by Congress and President Eisenhower on October 1, 1958, has played an important role in the hearts and minds teachers and their students. Although originally created as a national defense strategy, NASA’s space exploration missions have effectively inspired generations of people, not only in the U.S., but around the world.

I wanted to write about the recent announcements from NASA and the White House about the effect of the fiscal 2010 Federal Budget, and the implications for NASA. At a NASA budget press conference, NASA’s administrator & former astronaut, Charles Bolden, outlined the implications for the budget recommendations for NASA. The brief report is very interesting and you can read it here.

In one sense, the budget recommendations chart a new and dynamic course for NASA. Charles Bolden, NASA’s new director, starts off by saying:

I’m here today to tell you that this budget gives us a roadmap to even more historic achievements as it spurs innovation, employs Americans in exciting jobs, and engages people around the world.
Bolden outlined a number of directions that NASA will take in the years ahead that will invest in one of the most important aspects of the space program, and that is in innovation and inspiration. Here are some of the areas that were identified in the report.
1. Commitment to extend the life of the International Space Station beyond 2020.
2. Invest in critical and transformative technologies that will enable a path beyond low Earth orbit through development of new launch and space transportation technologies. Bolden says:
Imagine trips to Mars that take weeks instead of nearly a year; people fanning out across the inner solar system, exploring the Moon, asteroids and Mars nearly simultaneously in a steady stream of “firsts;” and imagine all of this being done collaboratively with nations around the world.
3. Enhance support for the commercial spaceflight industry. NASA hopes that this will alter the way astronauts are shuttled to and from the International Space Station.
4. Investment in new technology programs including new and novel approaches to spaceflight, development of new heavy lift research focusing on new engines, propellants, and materials, and the development of a broad space technology program.
5. Robotic exploration precursor missions that will pave the way for later human exploration of the moon, Mars and nearby asteroids.
6. Continued support of planned missions to study the planets and
stars.
7. Development of new satellites to be used to improve forecasting of climate change, and continuation of NASA’s Earth science program.
8. Ignition of student’s passion and interest in science. Bolden put it this way:
Our Summer of Innovation initiative this year will begin a massive collaboration with thousands of middle school teachers and students to engage in stimulating, hands-on math and science programs that draw on the best and most exciting NASA resources.

Darwin Day: February 12

On Michael Barton’s blog, The Dispersal of Darwin, there is a post informing us of a movement by the American Humanist Association to get the President to officially name February 12 as Darwin Day.  You can link here to read about the International Darwin Day Foundation, and indeed you can sign a petition urging the President to name February 12 as Darwin Day.

Last Fall, the BBC film Creation: The True Story of Charles Darwin was released.  It has now reached U.S. theaters, and I recommend that you try and see it, or wait for the DVD.  To whet your appetite, here is a link to a movie trailer.

Whether February 12th should be officially named by the President as Darwin Day is an open question, I think the story of Charles Darwin, his wife, and his children will be of great interest to you and your students.  Here are some resources for you:

Annie’s Box: Darwin, His Daughter, and Human Evolution by Randall Keynes

A Lesson on Darwin

Charles and Emma: The Darwins’ Leap of Faith

The Danger in Using a Test Score as a Measure of Student Achievement

A Wordle display of science concepts forming the typical high school science curriculum in any country in the world

It doesn’t matter whether you are high school student or teacher in Madrid,  Manila, Marietta, Manchester, Moscow, Mumbai, or Montevideo, the chances are that you will study or teach the same concepts in the high school science curriculum.  The science concepts that I have shown using  ”Wordle” (Wordle a neat program for generating ‘word clouds’ from text) may not include all the concepts that you teach, but it reflects the richness of the content of high school science.

In many schools around the world, students are required to take a 2 – 3 hour exit-examination in science (as well as other subjects in the curriculum).  And in today’s school environment at the state, national & international level, test scores are use synonymously with achievement. Indeed, the fact that we can attach a number to the test score, and use it compare scores from one school to another, one year to another, makes the notion of a test score even more believable.  We’ve come to believe that this test score is the measure of student achievement.

Yet when we look at this word map of science concepts, and note the range of ideas teachers explore with their students, we have to ask: Does a single exit-, high-stakes examination do justice to find out what high school students learn & knoq, and high school teachers present and teach in their classes?

For the past thirty years, there has been a movement, beginning at the state level, to define the science curriculum K -12 by writing statements describing what students should know and learn at the end of various levels of schooling. One of the earliest efforts was in Florida in the 1970’s.  There they developed objectives & test items for the K – 12 science curriculum. I speak from experience as I was involved in this process as a researcher at Florida State University, and project director at Georgia State University.   Other states followed, and by the early 1990’s, the National Academy of Sciences published the National Science Education Standards.  The intensions of the Standards are laudable, with the desire for all students to achieve scientific literacy.

Yet, the notion of standards has led us down a path that needs to be questioned.  Once national standards were developed, most states developed their own standards, and then hired test developing firms to design elaborate assessment systems based on the standards.  Then in 2002, the No Child Left Behind Act was signed into law, corralling school systems, schools, and state departments of education into a situation in which accountability, from “top-down” was the major determinant in the day-to-day life of teachers and students.

In an article entitled Debunking the Case for National Standards, Alfie Kohn, asks if we’ve lost our minds after the “common-standards movement” led by politicians, corporate CEO’s and companies that produce standardized tests, are mandating (nearly all States have bought into this & the Race to the Top Funds requires it), the development of a common set of standards in math and reading.  This will lead to common standards in science, social studies and other subjects.  And of course, this will lead to a “common set of achievement tests.”

This is a dangerous situation.  It’s dangerous because the test score itself is thought of as a real measure of what a student has learned.

The problem with the testing movement and the common standards movement is that it is led by a relatively small group of people, and as Kohn points out, most, if not all, are far removed from the nation’s classrooms.  Standards amount to the categorization of objectives (or concept statements) that a particular group thinks students in various grade levels should know or learn.  But does it matter if our nation has a set of standards that a small group claims are important, and then forces onto the entire educational establishment in the USA, which is comprised of about 15,000 individual & diverse school systems.  Kohn answers this in the following way:

It’s not only that national standards are unnecessary, they’re also based on the premise that “our teachers cannot be trusted to make decisions about which curriculum is best for their schools,” as the University of Chicago’s Zalman Usiskin put it. Moreover, uniformity doesn’t just happen—and continue—on its own. Someone has to make everyone apply the same standards. What happens, then, to educators who disagree with some of them or with, say, the premise that teaching must be split into separate disciplines? What are the implications of accepting a system characterized by what Deborah Meier has called “centralized power over ideas”?

Implicit in following the common standards route is the danger that will lurk in the subsequent tests that will be developed by testing companies—and that danger is in believing that these tests will be a measure of student achievement in our nation’s schools.   Teachers need to be seen as decision-makers, and professions who are quite able to work locally to develop curriculum relevant to the students they teach.

How Knowledge of Geology will be Important in Rebuilding Haiti

According to reports from Haiti, the relief effort is in full swing, and although search and rescue efforts were officially stopped, in truth,  they are still happening, and of course this is a hopeful event for the people in Haiti.  According to Christiane Amanpour, the U.N. is beginning to work toward the clearing away of debris by hiring Haitians, and also is encouraging as many people as possible to travel to other parts of the country to be with family and friends, away from the center of the earthquake damaged Port-Au-Prince.  Yet this has resulted in the destination towns being overwhelmed with people, but without any supporting resources.

Plate and Fault Systems in the Caribbean and Haiti

As the U.N. and the Haitian government make plans for the reconstruction and rebuilding Port-Au-Prince, and surrounding communities, it will be crucial buildings and roads be designed with knowledge fault lines, and potential earthquake zones.

To geologists, there was no surprise that the 7.0 earthquake occurred, as cruel as it was to the people of Haiti.  As shown in the Plate and Fault Systems map shows, there are two horizontal east/west faults.  It was movement along one of these two faults, the Enriquillo Fault, a strike-slip fault, that caused the 7.0 earthquake.  Geologists have reported that there have been earthquakes along this fault line, the most recent about 200 years ago.

Plate Movements in the Caribbean

The seismic activity in the region is caused the movement of tectonic plates.  In a New York Times article, the geology of the region is explored by Henry Fountain.  In this piece, Fountain reports that:

The recent quake on the Enriquillo fault and the forecast for the Septentrional are bleak reminders that the Caribbean is an active seismic zone, one with many hazards. Major earthquakes have regularly devastated the region’s cities, including the Jamaican capital, Kingston, which was destroyed twice in three centuries.

In the reconstruction of Haiti, it will be important that the knowledge of the potential for earthquakes be taken into account in the development of new buildings, especially schools and hospitals.

Humanitarian Assistance for Haiti

The United Nations initiated a “flash appeal” for assistance after the devastation earthquake in Haiti.  As the map below shows, the earthquake intensity, based on the Modified Mercalli Intensity Scale (a measure of the violence of earth motion).  Here is a map from USAID which shows the earthquake intensity from the epicenter out to surrounding areas of the country.  The fact that such extreme, violent, and severe intensity was experienced by so many people has resulted in the worst disaster in the Western Hemisphere in recorded history.

United States Agency for International Development Earthquake-Intensity Map

The United Nations, individual nations, and relief and charity organizations mobilized immediately after the earthquake.  The United Nations implemented a flash appeal for resources and money as shown in the chart below.  The initial appeal amounted to about $575 million, and as can be seen in the chart, many organizations and countries have responded to the appeal.  Assistance has also extended beyond this initial flash appeal to individual organizations, and last night’s Hope for Haiti Now Telethon which raised more than $57 million in the USA, and $16 million in Canada.

United Nations Flash Appeal Snapshot

As we listen to people who are on the ground helping the Haitian people, and working with their respective organizations to build an infrastructure that will bring food, shelter and medical care to the people who have been hurt by this earthquake.

Assessment of the Haiti Earthquake and Aftershocks

The aftershocks that have rocked the region near the 7.0 earthquake of January 12 in Haiti will continue for months, if not years, according to a report by the United States Geological Survey (USGS).  It is important to understand the nature of the seismic activity in this region as this knowledge will be significant in the near-term relief efforts, but perhaps more importantly, in the long term rebuilding of the infrastructure of the country near Port-Au-Prince, and the many surrounding communities.

M7.0 Haiti Earthquake and Aftershocks Map. Click on map to go to USGS active map site.

Here is a brief synopsis of the USGS assessment of the 7.0 earthquake and the aftershocks.

Aftershocks. According to the USGS, aftershocks will continue for months if not years in the area seen on the map here.  The map shows the initial earthquake (largest red circle), and the aftershocks as of January 21.  The USGS initial assessment includes the possibility of an earthquake greater than 7.0 (less than 3%), but earthquakes ranging from 5.0 to 6.0 have a higher probability.

Precautions.  As we watch the pictures and video from Haiti, we are all aware of the rescue activity that is in progress where the work is being done in damaged structures, which are extremely vulnerable to further destruction by these aftershocks.  Aftershocks (earthquakes) in the 5.0 range are quite powerful, especially since these earthquakes are fairly shallow with the energy being concentrated near the surface.

Concerns for the Near-term.  As I have discussed, the fault that caused the Port-Au-Prince earthquake is part of a very active seismic region existing between the North American and Caribbean tectonic plates.

The Caribbean Plate showing its boundaries with the North American, Cocos, & South American Plates

The Caribbean Plate is an oceanic tectonic plate that encompasses roughly 3.2×106 km² and underlies Central America and the Caribbean Sea off the north coast of South America.  As you can see on the map is located between not only the North American Plates, but the Cocos plate to the west, and the South American plate to the south.  The North American Plate is a tectonic plate covering most of North America, Greenland and parts of Siberia and Iceland.  The boundary between the North American and Caribbean plates is what geologists call a strike-slip fault or transform boundary.  It is along this boundary that the 7.0 Haiti earthquake occurred.  As seen on the map this boundary extends across quite a distance starting in east in the Virgin Islands, extending westward through Puerto Rico, Hispaniola (Haiti & The Dominican Republic), continuing to Cuba, and then into Honduras, Guatemala, and Belize.  This entire boundary is active seismically.

Topography along the Enriquillo-Plaintain Garden Fault, Haiti

In fact many geologists describe the area between these two plates as a micro-tectonic plate, that is being squeezed and ruptured by the three plates that surround it.  In the USGS report, geologists suggested that the earthquake did relieve some of the stress on the fault system, but they caution that the Enriquillo fault to the east of the January 12 earthquake is still under great stress, and could result in a damaging earthquake in the future. The red lines on the map indicate fault zones, which the black circles show the location and magnitude of earthquakes in the region.

Long-term Concerns.  As shown in the map above, Haiti has major fault zones cutting across the country, and the historical record shows that major earthquakes have happened in this region of intense seismic activity.   Rebuilding of structures in Haiti needs to take into account the effect of earthquake shaking on buildings.  Structures need to be designed that take this into account, and meet standards that will help new building withstand intense ground movements.  One area that the report emphasizes is that it is essential that structures such as hospitals and schools be rebuilt with greater ability to withstand earthquakes.

Caribbean Seismicity.  The Haiti earthquake was the result of earth movement along a fault that is part of the zone between the Caribbean and North American tectonic or crustal plates.  This region, is sometimes called a small-scale “ring of fire,” analogous to the Pacific rim “ring of fire.”  It includes Puerto Rico, Jamaica, Dominican Republic, Martinque, and Guadeloupe.  The map below shows the extent of the seismic activity in the Caribbean, as well as to the region further to the West along the coast of South America.  Rebuilding efforts in the region need to take into account the knowledge we have of seismic activity in the region.

Seismicity of the Caribbean Tectonic Plate region, USGS

Haiti Relief Effort: Global Resources & Agencies

The Haiti relief effort is in full operation, with the United Nations, individual relief organizations, the U.S. government including the U.S. military and eight additional departments and agencies within the government, and humanitarian aid, and resources from countries around the world.  The earthquake caused widespread damage, and ruined the infrastructure of the country.  The head of the International Monetary Fund has called for a “Marshall-like Plan” to help rebuild the country, and help establish a viable infrastructure and economy.   This blog post comments on some of the efforts that are underway.

In lessons learned from the 2004 tsunami in Indonesia, the United Nations developed a “Cluster System” to coordinate relief efforts.  The purpose of the cluster system is to put experts on the ground as soon as possible, and to organize them into groups based on expertise.   For example, according to U.N. officials, there are meetings every day at 3 p.m. at the Ministry of Water in Port-au-Prince, in the offices which have not been too badly damaged, so that all water and sanitation agencies will go to that meeting and coordinate how they best respond.  Although the cluster system is not without its critics, it was implemented in recent disasters in the Pakistan earthquake, and floods in the Philippines.

Port-Au-Prince Medical Infrastructure Information, Jan. 22

Another example of the cluster system is the Health Cluster, in which partners will work with the national health authorities and health partners to ensure a coordinated response to the needs of the Haitian population.

Here is a list of some of the efforts underway in Haiti, and links to further information.

United Nations Humanitarian Map of Haiti

United Nations.  The U.N. has a multi-pronged effort underway involving Children (UNICEF), Development (UN Development Program), Food (World Food Program), Health (UNAIDS & World Health Organization), Humanitarian Coordination (OCHA), and Population (United Nations Population Fund)

U.S. Haiti Earthquake Relief.  Firstly, if you go to this White House site, you will find links to many agencies within the Federal Government which are directly involved in relief efforts in Haiti.  The most visible form of assistance has been the U.S. Military, and you can visit this site to find out how U.S. Defense Department is aiding the Haitian population. You can find how the U.S. Department of Health and Human Services is helping at this site.  An important part of the effort is organized by USAID.  USAID is an independent federal government agency that receives overall foreign policy guidance from the Secretary of State.  The U.S. Department of State has established this website that describes its activities, and how the Department of State is helping the Haitian people.  You can link to the U.S. Embassy in Port-Au-Prince, Haiti at this website.  Further assistance is provided by Department of Homeland Security, and the Interior Department.

Independent Aid Organizations.  There are many organizations that have had a presence in Haiti long before the January 12th earthquake.  These humanitarian organizations are there on the ground, working to help the people of Haiti.  There is a very extensive list of these organizations at this New York Times site for your information.

Aftershocks of the Haiti Earthquake: Are they Earthquakes?

Today, Haiti experienced a rather large 6.1 aftershock that was located 56 km from Port-Au-Prince.  Aftershocks are earthquakes.  In Haiti, there have been more than 40 aftershocks ranging from 3.0 to 5.9 as seen in the map here.  Today’s aftershock was the largest one since the 7.0 earthquake last Tuesday.  The relief efforts are underway, but the enormity of the task appears daunting, yet when we listen to those who are there, and who are working directly with victims through aid organizations, we see some progress, and the determination on the part of Haitian people and the workers who are there to help.

Map of the aftershocks of the January 12th 7.0 earthquake. Click on the map to go to the USGS active map and data.

As President Obama has said, the immediate task is search and rescue, providing medical treatment and aid, and bringing food and water to the Haitian people.  But in the long run, he said that we’ll need to work closely with the government and people of Haiti to help them preserve and reclaim their nation.  This will happen through a massive humanitarian effort, and that  effort is underway.

According to a GDACS report, an earthquake of magnitude 6.1 occurred in the very highly populated region of Ouest in Haiti.  The center of the map locates the epicenter of this earthquake.  As with the 7.0 earthquake, the aftershock had a considerable effect on the population in this part of Haiti.  As you can see in the map to the left, aftershocks have been considerable in the area of the original 7.0 earthquake (the largest red circle).  The USGS has made a preliminary assessment of the earthquake, the aftershocks, and the future seismic activity in the region, and you can read their report here.

The 7.0 earthquake of a week ago was one of the most powerful earthquakes to happen in Haiti in more than 200 years.  That earthquake, which occurred within miles from the capital, Port-Au-Prince, was the result of movement along the Enriquillo-Plantain Garden fault zone.  The movement in this area is caused by the relative movement of the North American and Caribbean tectonic plates.  Geologists describe this motion as a strike-slip or transform fault movement where one side of a fault slides horizontally past the other.

Diagram of a strike-slip fault, similar to the fault system in Haiti

As in the case of the 7.0 earthquake, the 6.1 aftershock today, and the other 40 or so aftershocks since last Tuesday, the epicenters of these quakes are fairly shallow, e.g. about 5 – 7 miles beneath the surface.  The energy of shallow quakes such as these is concentrated near the surface of the earth resulting in enormous ground movement and damage, especially in Haiti, which buildings have been constructed without regards to earthquake preparedness.

The nature of the earthquakes that occur along the boundary between the North American and the Caribbean tectonic plates has been documented by geologists.  In a Scientific American article, it was noted that:

the two plates are “shearing the island, crushing it, grinding it.” So although such a large earthquake has not shaken Haiti since the 18th century, “this is quite an earthquake-prone region,” Blanpied said. And it is not the biggest quake to hit the Island of Hispaniola (which Haiti shares with the Dominican Republic) in recent history. A magnitude 8.0 earthquake rocked the Dominican Republic in 1946.

Someone asked me today how the earthquake in Haiti differed from the earthquake that caused the 2004 devastating Indian Ocean tsunami.  The earthquake produced the most destructive tsunami in recorded history, killing more than 230,000 people.  The earthquake had a magnitude between 9.1 and 9.3, and was the second largest earthquake recorded, and resulted in faulting of rocks that lasted about 8 minutes.  Again a record.  But this earthquake happened not as the result of two plates sliding past one another, but when one plates sinks beneath another plate.

Subduction zone showing on crustal plate sliding under another. Diagram, from NASA

Geologists call this subduction.  In the case of the earthquake that occurred in the Indian Ocean, the India plate slides beneath or under the Burma Plate.  According to geologists, a rupture of about 250 miles long and about 60 miles wide and 19 miles beneath the seabed caused the earthquake.  This was a huge earthquake, and geologists, after studying seismic records have determined that aftershocks from this quake continued for months after the December quake.

The tsunami that was produced by this massive quake affected fourteen countries, and produced waves as high as 100 feet.  Indonesia, Sri Lanka, India, and Thailand were the hardest hit.

Global Response to the Earthquake in Haiti

It has nearly been a week since the devastating 7.0 earthquake struck Port-Au-Prince, Haiti, and the surrounding cities and towns of this Caribbean country. The disaster is one of the worst in the Western Hemisphere, and our hearts go out to the suffering that is being experienced by so many people in this country. The response to help the people in Haiti has been a global response. Countries and organizations from all over the world have sent people and resources to Haiti.

The enormity of the task to get the needed medical services, food & water, and shelter to the victims has been hampered by the inability to traverse the roads from the airport, where food and water has been staged, to the various cities and towns.

Those of us at a distance from Haiti can try and provide monetary support, and also try and learn as much as we can about this country, its people, and what steps must be taken to restore and help the country re-build after this disaster. This will take time. At the present time, the immediate need is to save lives, and to get help to the people who have suffered so much.

As educators, our psyches are nourished by helping our students prepare for their futures. It is hope that we bring to our students through our work. In the case of our concern about Haiti, and its people, we support all of the efforts to make a future possible for the Haitian people. We look for examples of hope, or human bravery, and how help is being brought to the Haitian people.

There are some sites on the Internet that can be helpful to you and your students. Here are a few.

The Global Disaster Alert and Coordination System. This provides real-time alerts about natural disasters, and tools to facilitate coordination. At this site you will find a great deal of information about the Haiti earthquake, and what is being done to help the people.

Real time information is provided here at the GDACS Website

Haiti: The Geology and Geography. From the New York Times, here is a map showing the geology of the area, and damage sustained in various sectors.

The Charity Navigator. This is an independent charity evaluator, which analyzes the largest charities, and in the case of Haiti, provides some specific recommendations. Five charities that were highly recommended by the Director of the Charity Navigator include:

Partners in Health. This group has been working for more than 20 years in Haiti and specializes in working for the poor in health care.

Partners in Health Care

Direct Relief International. Provides direct medical help, and has already established teams to begin treatment for the people in the earthquake. Read about what they are doing now.

AmeriCares. AmeriCares delivers medicines, medical supplies and aid to people in crisis around the world. Already on the ground in Haiti, you can read about their progress.

Water Missions International. This organization provides safe, clean water in developing countries and in disaster areas.

Save the Children. The mission of this organization is to create lasting, positive change in the lives of children. You can view a short video of the work that they do.

And here is a video of Michele Obama on the Haiti response around the world.

The Severity of the Haitian Earthquake

The earthquake that occurred near Port-Au-Prince, Haiti on January 12, 2010 was one of the worst ever natural disasters.  Aid is pouring into the Haitian capital, and aid organizations, and governments from around the world are descending on this Caribbean country.  Our hearts go out to the people in Haiti, and we only hope that the aid that is streaming there, and on the ground will reach the people who so desperately need it.  For resources, and up-to-the-minute information go the ClintonBushHaiti Fund.

In this post, I am going to talk about the nature of the Haitian earthquake, and what we know about predicting and preparing for earthquakes.  We know alot, but we still can not predict earthquakes.  Here is some information in light of this tragedy in Haiti.

Enriquillo-Plantain Garden Fault

Roger Musson, a British Geological Survey geologist spoke with Eban Harrell who reported his remarks in a Time online report.  According to Musson, the earthquake that happened on Tuesday was what geologists call a strike-slip (or transform) earthquake where one side of fault slides horizontally past the other side.

Diagram of a strike-slip fault, similar to the fault system in Haiti

Musson identified the fault as the Enriquillo-Plantain Garden fault, and it analogous to the San Andreas fault in that this type of fault is the boundary between two crustal plates.  As Musson points out, this was the “big one” for this fault in that the previous very large quake here was nearly 200 years ago.  In his opinion, the pressure along this fault system has shifted to the West, and he expects another large earthquake in 20 – 40 years in Haiti or Jamaica.   He also thinks that the aftershocks will dissipate over the coming days.

Predicting Earthquakes

Can earthquakes be predicted?  Could this one in Haiti been predicted. As I said above, the fault system within which the Haitian earthquake happened is analogous to the San Andreas Fault that separates the western edge of the North American Plate from the eastern edge of the Pacific Plate.  According to geologists, the Enriquillo-Plantain Garden Fault are studied and monitored to the same degree that geologists have been monitoring and studying the San Andreas Fault in California.

Strike-Slip Arrangement of the San Andreas Fault, an Aerial View

Over long periods of time, 20, 40, 80, 100, 200 years, geologists can say that one could expect an earthquake along a particular fault system.  In the case of Haiti, geologists have been predicting that a large earthquake could occur along the boundary between the Caribbean and the North American plate.  Earthquakes can not be forecast the way we can forecast a tornado or a thunderstorm, or even a volcanic eruption.  Earthquakes go undetected until they happen.

Yet, geologists know a lot about the fault zones here in the Caribbean, and can make general statements about the hazards associated with a fault zone.  But still, we are unable to say that an earthquake will happen at a particular time.

Preparing for Earthquakes

The only thing we can do is to prepare for an earthquake.  The U.S. Geological Survey has an earthquake hazards program and website that is valuable and would be useful to you in sharing and teaching your students about earthquakes.

The extent of the destruction of the buildings in Port-Au-Prince and the cities and towns near indicate the lack of earthquake-resistant construction.  Haiti, which is one of the poorest countries in the Western Hemisphere has not had the financial resources to undertake a comprehensive approach to earthquake-resistant construction.  You might recall that the 2008 Sichuan earthquake destroyed thousands of buildings, many of which were schools.  Later inspection revealed that most of these schools were built without consideration of earthquakes, and the result was utter disaster, and the death of more than 10,000 school children.

Masonry building destroyed in the Port-Au-Prince

A valuable resource in helping us understand the cause and sources of earthquake damage is National Information Service for Earthquake Engineering.  In the case of the earthquake in Haiti, many of the buildings were constructed of unreinforced masonry, which according to engineering geologists is extremely susceptible to damage during an earthquake.  The loss of buildings in this city was catastrophic as is evidenced by the pictures we all see on television and on the Internet.

The Destructive Power of Earthquakes

The Haitian earthquake was huge, and because it occurred near a major metropolitan area, several million people have been affected by the quake.  Some estimates put the number at 3 million people.  In the context of other significant earthquakes, the Haitian earthquake is one of the worst.

Here is a list of the ten most destructive earthquakes compiled by the editors of Time.

  1. 1556: Shaanxi, China
  2. 1976: Tangshan, China
  3. 2004: Indian Ocean Tsunami
  4. 1920: Haiyuan, China
  5. 1923: Kanto, Japan
  6. 1948: Turkmenistan
  7. 2008: Sichuan Province, China
  8. 2005: Kashmir, Pakistan
  9. 1908: Messina, Italy
  10. 1970: Chimbote, Peru