Iran is a
nation that has quite a bit of tectonic activity. The Bam earthquake occurred in
Iran in 2003 with a magnitude of 6.6 on the Richter scale. It caused more than
30,000 deaths. This is just one example of a deadly earthquake that occurred in
Iran. Most tectonic activity that occurs in the Middle East is caused by the
convergence between two plates. These plates are the Arabian plate and the
Eurasian plate. The collision between these plates has caused crustal
shortening of the Alborz and the Kopet Dag mountain ranges (both located in
northern Iran). One also can see the results of these plates colliding by
observing the Zargos Ranges. Folding rocks, rising mountains, and fault
movements have occurred in the Zargos region due to tectonic activity involving
these plates. The Zargos region is where the highest frequency of earthquakes
in Iran occur. The intensities of earthquakes in the region are now pretty low
due to deformation. It's different in
Central-East Iran, where deformation takes place along a range of intersecting
faults. Unlike the Zargos region, the earthquakes in Central-East Iran are a
lot more localized. They also have much higher magnitudes. Central-East Iran is
the area where the Bam earthquake occurred. Earthquakes of large magnitude also occur in
other parts of the country, including Zanjan and Azerbaijan. Certain things are
being done to predict earthquakes in Iran. GPS technology is being used to
monitor Earth movements over long periods of time in order to predict the
location and magnitude of potential earthquakes. In order for seismic activity
to be predicted accurately in places like central Iran, advanced computer
models need to be utilized with both ground-based and GPS data to assess tectonic
activity.
Seismic hazard map of Iran http://earthquake.usgs.gov/earthquakes/world/iran/gshap.php |
Damage from the Bam earthquake http://www.nationalgeographic.com/features/04/forcesofnature/forces/e_img_1_6.html |
Major faults of Central-East Iran and the locations of the three largest earthquakes of the modern age http://www.payvand.com/news/04/jan/1109.html |
Corresponding Lecture:
Tectonic Processes
Sources of Information:
http://earthquake.usgs.gov/earthquakes/eventpage/usb000s3np#summary
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