Risa's Pieces
Tectonic Summary (October 26th 2015)
7.5 earthquake below the Hindu Kush Range: result of reverse faulting. Focal mechanisms indicate rupture: either a near-vertical reverse fault or a shallowly dipping thrust fault. Collision causes uplift: direct result of convergence between India and Eurasia plates. Intermediate quakes (depth 70 to 300 km): 2002 landslides caused 150 fatalities, destruction of over 400 houses. Seismicity in the hazardous Himalaya: continental collision converging, relative rate of 40-50 mm/yr. Yarlung-Zangbo Suture (to the north) and Main Frontal Thrust (to the south): This region has the highest rates of seismicity The largest recorded Himalaya earthquake: 15th August 1950 in Assam, strike-slip, widely felt in central Asia, extensive damage. Collective faults, crustal shortening, ongoing collision, thrust faults, north south compression, normal and strike-slip, east-west extension. The active, left-lateral, strike-slip Chaman fault: fastest moving in the region. In 1505, a segment near Kabul ruptured: widespread destruction. Shallow crustal earthquakes also occur near the Main Pamir Thrust and other active Quaternary faults. Also within the Indo-Burmese Arc: combination of strike-slip and reverse faults; Sagaing, Kabaw and Dauki. Risa's Pieces
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