The Earthquake
Pakistan-administered Kashmir lies in the area of collision of the Eurasian and Indian tectonic plates. The geological activity born out of this collision, also responsible for the birth of the Himalayan mountain range, is the cause of unstable seismicity in the region. The Pakistan Meteorological Department estimated the 5.2 magnitude on the richter scale. The United States Geological Survey (USGS) measured its magnitude as a minimum of 7.6 on the moment magnitude scale, with its epicentre at 34°29′35″N 73°37′44″E / 34.49306°N 73.62889°E / 34.49306; 73.62889, about 19 km (12 mi) northeast of Muzaffarabad, Pakistan-administered Kashmir, and 100 km (62 mi) north-northeast of the national capital Islamabad. The earthquake is classified as "major" by the USGS. The hypocenter was located at a depth of 26 km (16 mi) below the surface. The Japan Meteorological Agency estimated its moment magnitude at 7.8. By comparison, the 2004 Indian Ocean earthquake had a magnitude of 9.15. The worst-hit areas were Pakistan-administered Kashmir, Khyber-Pakhtunkhwa,and western parts of the Kashmir valley in Indian-administered Kashmir. Also affected were some parts of the Pakistani province of Punjab, the capital city of Islamabad, and the city of Lahore which experienced a minor aftershock of magnitude 4.6. There were many secondary earthquakes in the region, mainly to the northwest of the original epicentre. A total of 147 aftershocks were registered in the first day after the initial quake, of which one had a magnitude of 6.2. Twenty-eight of these aftershocks occurred with magnitudes greater than the original quake. On October 19, a series of strong aftershocks, one with a magnitude of 5.8, occurred about 65 km (40 mi) north-northwest of Muzaffarabad. As of 27 October 2005 there have been more than 978 aftershocks with a magnitude of 4.0 and above that continue to occur daily. (See USGS for a list of recent aftershocks and effects.) Since then, measurements from satellites have shown that mountain parts directly above the epicenter have risen by a few meters, giving ample proof that the rising of the Himalayas is still going on, and that this earthquake was a consequence of that.
Read more about this topic: 2005 Kashmir Earthquake
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