Copyright Information: All images are in the public domain and available for free. If you use this image, credit NOAA/NGDC, M. Mehrain, Dames and Moore. |
Large differential settlement due to liquefaction. The building to the left sank relative to the small (lighter) attached structure. The structures probably do not share a joined foundation. Much evidence of liquefaction was identified in the towns of Astaneh Ashrafieh, Lushan, and Noosher. These villages are located on soft sediments near the shore of the Caspian Sea. The foundations of structures were affected by the spreading or weakening of the liquefied soils, causing extensive structural damage. Image Credit: M. Mehrain. Dames and Moore June 20, 1990 Northern Iran earthquake A magnitude 7.7 earthquake occurred in the Gilan Province between the towns of Rudbar and Manjil in northern Iran on Thursday, June 21, 1990 (June 20 at 21:00 GMT). The event, the largest ever to be recorded in that part of the Caspian Sea region, may have been composed of two or more closely-spaced earthquakes occurring in rapid succession. These quakes, exceptionally close to the surface for this region, were also unusually destructive. Event Data:
|
|
