An intraplate earthquake occurs in the interior of a tectonic plate, in contrast to an interplate earthquake on the boundary of a tectonic plate. They are relatively rare compared to the more familiar interplate earthquakes. Buildings far from plate boundaries are rarely protected with seismic retrofitting, so large intraplate earthquakes can inflict heavy damage. Examples of damaging intraplate earthquakes are the devastating 2001 Gujarat earthquake, the 2011 Christchurch earthquake, the 2012 Indian Ocean earthquakes, the 2017 Puebla earthquake, the 1811–1812 New Madrid earthquakes, and the 1886 Charleston earthquake. An earthquake that occurs within a subducting plate is known as an intraslab earthquake.
The 2002 Hindu Kush earthquakes struck in northern Afghanistan during the month of March. At least 166 people were killed with a very large and intermediate-depth mainshock on March 3. Three weeks later, at least 1,200 were killed during a moderate but shallow event that had a maximum Mercalli intensity of VII. The M7.4 and M6.1 reverse events were focused in the Hindu Kush mountain range area.
The 2008 Ziarat earthquakes hit the Pakistani province of Balochistan on October 29 with a moment magnitude of 6.4. The US Geological Survey reported that the first earthquake occurred 60 km (37 mi) north of Quetta and 185 km (115 mi) southeast of the Afghanistan city of Kandahar at 04:09 local time at a depth of 15 km (9.3 mi), at 30.653°N, 67.323°E. It was followed by another shallower magnitude 6.4 earthquake at a depth of 14 km (8.7 mi) approximately 12 hours after the initial shock, at 30.546°N, 67.447°E. 215 people were confirmed dead. More than 200 were injured, and 120,000 were rendered homeless. Qamar Zaman Chaudhry, director general of Pakistan Meteorological Department, stated the quake epicenter was 70 miles (110 km) north of Quetta, and about 600 km (370 mi) southwest of Islamabad.
A 6.2 magnitude earthquake occurred in Afghanistan on October 22, 2009, at 19:51:27 UTC. The maximum Mercalli intensity was V (Moderate) at Fayzabad, Badakhshan.
The 2011 Dalbandin earthquake occurred on with a moment magnitude of 7.2 and a maximum Mercalli intensity of VII. The shock occurred in a sparsely populated area of Balochistan, caused moderate damage, three deaths, and some injuries.
The 2013 Saravan earthquake occurred with a moment magnitude of 7.7 at 15:14 pm IRDT (UTC+4:30) on 16 April. The shock struck a mountainous area between the cities of Saravan and Khash in Sistan and Baluchestan province, Iran, close to the border with Pakistan, with a duration of about 25 seconds. The earthquake occurred at an intermediate depth in the Arabian plate lithosphere, near the boundary between the subducting Arabian plate and the overriding Eurasian plate at a depth of about 80 km.
The 2013 Balochistan earthquakes were the deadliest to affect Pakistan since 2005. The mainshock, occurring on 24 September, had a moment magnitude of 7.8 and maximum Mercalli intensity of IX (Violent). It had an epicenter located in Awaran District, 113 km (70 mi) northwest of Bela. The mainshock killed over 820 people, injured hundreds of others, and left 100,000 people homeless. The Awaran District was among the worst affected with 80 percent of its housing stock damaged or destroyed. On 28 September, the region was affected by a Mw 6.8 aftershock, killing an additional 15 people. Rescue and recovery efforts were severely hampered by insurgents who attacked military troops sent to distribute aid. These attacks also prompted the Pakistan government to close its doors to international aid.
A major earthquake occurred in Nepal on 12 May 2015 at 12:50 pm local time with a moment magnitude of 7.3, 18 kilometres (11 mi) southeast of Kodari. The epicenter was on the border of Dolakha and Sindhupalchowk, two districts of Nepal. This earthquake occurred on the same fault as the larger magnitude 7.8 earthquake of 25 April, but further east than the original quake. As such, it is considered to be an aftershock of the April quake. It struck at a depth of 18.5 km (11.5 mi). Shaking was felt in northern parts of India including Bihar, Uttar Pradesh and West Bengal. Tremors were felt as far as about 2,400 km away from the epicenter in Chennai.
The October 2015 Hindu Kush earthquake was a magnitude 7.5 earthquake that struck South Asia on 26 October 2015, at 13:39 AFT with the epicenter 45 km north of Kuran wa Munjan, Afghanistan, at a depth of 231.0 km.
On 7 December 2015, an earthquake measuring 7.2 on the moment magnitude scale struck Tajikistan 105 km (65 mi) west of Murghab at 07:50 UTC at a depth of 26.0 km (16.2 mi). The earthquake was also felt in neighboring Xinjiang in China, India, Afghanistan, Pakistan and Kyrgyzstan.
The 2016 Imphal earthquake occurred on 4 January 2016 at 4:35 a.m. local time in Manipur, and had a magnitude of 6.7 Mw. The seismic wave radius travelled over 200 km and shaking was felt in numerous cities, including Imphal, Silchar and Guwahati. 13 people in India and Bangladesh were killed, and many buildings in the city of Imphal and surrounding areas were damaged.
The 2019 Kashmir earthquake struck regions of Pakistan with an epicentre in Azad Kashmir on 24 September at 16:02 local time. It had a magnitude of 5.4 and a maximum felt intensity of VII on the Modified Mercalli intensity scale or VIII on the European macroseismic scale. There was severe damage in Mirpur District, causing the deaths of 40 people and injuring a further 850. The epicentre of the shallow quake was near the city of Mirpur, Pakistan. The tremors were felt in the Kashmir region, Punjab (Pakistan), Punjab (India), Uttarakhand and northern parts of India including New Delhi.
The 2021 Assam earthquake struck 11 km away from Dhekiajuli, Assam, India at 07:51 (IST) on April 28, 2021 with a moment magnitude of 6.0 at 34.0 km (21.1 mi) depth. The quake struck with an epicenter 140 km north of the main city of Guwahati. It resulted in two fatalities and at least 12 injuries.
The 1983 Hindu Kush earthquake occurred south of Fayzabad, Badakhshan in northeast Afghanistan at 03:52 PST on December 31, 1983, near the border with Pakistan and the USSR. Striking 214.5 km beneath the Hindu Kush mountains, the moment magnitude 7.4 quake affected three countries, killing at least 26 people and injuring several hundred.
The Lenin Peak disaster occurred on 13 July 1990 when 43 climbers were killed during an avalanche on the 7,134-meter-high mountain peak in northeast Tajikistan and Kyrgyzstan. The deadly avalanche was triggered by a moment magnitude scale 6.4 earthquake which struck at a depth of 216.8 km beneath the Hindu Kush mountains in neighbouring Afghanistan. The incident is believed to be the deadliest mountaineering disaster in history.
The 1991 Hindu Kush earthquake severely affected Afghanistan, Pakistan and the USSR on 1 February. It was an intermediate-depth earthquake with a hypocenter 143.2 km (89.0 mi) beneath the Hindu Kush mountains in Afghanistan. The shock measured 6.8 on the moment magnitude scale and had a maximum Mercalli intensity of X (Extreme). The reverse-faulting earthquake occurred in a seismically active region associated with faulting within a deforming oceanic plate at depth.
On 21 March 2023, a magnitude 6.5 earthquake struck Badakhshan Province, Afghanistan, with an intermediate depth of approximately 187 km (116 mi). The epicenter of the earthquake was 40 km (25 mi) south-southeast of Jurm.
