UTC time | 2011-03-24 13:55:13 |
---|---|
ISC event | 16357310 |
USGS-ANSS | ComCat |
Local date | 24 March 2011 |
Local time | 20:25:13 (UTC+06:30) |
Magnitude | 6.8 Mw |
Depth | 10 km (6.21 mi) |
Epicenter | 20°39′54″N99°53′06″E / 20.665°N 99.885°E |
Max. intensity | MMI X (Extreme) [1] |
Casualties | 75–151 killed, 212 injured |
The 2011 Tarlay earthquake occurred on 24 March in Shan State, Myanmar. The earthquake measured Mw 6.8 and had an epicenter northwest of the border between Myanmar, Thailand and Laos. It occurred in a region accommodating tectonic deformation brought by the collision between the Indo-Australian and Eurasian plates. Strike-slip faulting along the Nan Ma Fault was identified as the cause. There were between 75 and 151 fatalities; including one death in Thailand. An additional 212 people were injured. Hundreds of buildings and some transport infrastructure were damaged in Myanmar and Thailand. [2] In the aftermath of the disaster, the Burmese government provided aid and relief supplies to the affected region. Neighbouring countries China, India and Thailand provided monetary assistance. Several international humanitarian organizations also supported in the relief and recovery.
Myanmar lies at the junction of the Alpine–Himalayan Orogenic Belt and Indonesian Island Arc System. In northern Myanmar, continental collision is ongoing between the northward moving Indian plate and the Eurasian plate. Collision also occurs along the Indo-Burman Ranges (Patkai, Naga and Chin Hills) and Arakan Mountains of western Myanmar. [3] In this zone of highly oblique collision, most of the motion is accommodated by the north–south trending Sagaing Fault, a major right-lateral strike-slip fault that runs through the western and central part of Myanmar. Additional deformation is distributed and accommodated within eastern Myanmar and Thailand extending into Laos. Deformation within the Shan Plateau is partly accommodated by a set of southwest–northeast trending left-lateral strike-slip faults. Major faults in the Shan Plateau include the Mae Chan, Nam Ma, Menxing, Menglian, Nantinghe, Wanding, and Longling faults. [4] The faults closest to the epicenter are the Mae Chan and Nam Ma faults, about 400 km (250 mi) east of the Sagaing Fault. [5] [6]
The Mw 6.8 earthquake occurred with a focal depth of 10 km (6.2 mi) and epicenter north-northwest of Tachilek, Shan State; north of the Golden Triangle region. [7] It was one of the largest earthquake recorded in the area. A focal mechanism solution obtained for the earthquake indicated left-lateral slip along a vertical fault plane. Large earthquakes also struck the area in 1988 (Mw 7.0) and 1995 (Mw 6.8). [8]
The northeast–southwest trending Nan Ma Fault runs through Myanmar, northern Laos and China for a length of 215 km (134 mi). Geomorphic studies along the central section of the fault where the Mekong River crosses it suggest it was previously a right-lateral fault. It produced up to 30 km (19 mi) of right-lateral displacement between 5 and 20 million years ago. [9] The fault reactivated as a left-lateral fault and its average slip rate is estimated at 0.6–2.4 mm (0.024–0.094 in) per year. The fault branches from a single structure into multiple subparallel splay segments at its westernmost end. The earthquake ruptured one of these segments at the westernmost Nan Ma Fault. [8]
The mainshock produced a 30 km (19 mi) long surface rupture along the westernmost segment of the Nam Ma Fault. The surface offset peaked at almost 2 m (6 ft 7 in). Based on inferring InSAR data, the coseismic slip along the fault rupture was concentrated within the shallow 10 km (6.2 mi) of the crust. The maximum slip was estimated at 4 m (13 ft) at depths of 3–5 km (1.9–3.1 mi). [8] Clear surface faulting was observed on farmland; at the paddy fields 16 km (9.9 mi) southeast of the epicenter, 2 km (1.2 mi) of surface rupture was mapped. The measured offset ranged between 0.12 m (4.7 in) and 1.25 m (4 ft 1 in) with an average of 0.81 m (2 ft 8 in). In Tarlay, offsets were in the order of several tens of centimetres. [9]
The earthquake was associated with 24 seconds of significant ground motion. Resonance may have occurred in the frequency range of 1.82–2.1, affecting many low to medium-rise buildings. The horizontal ground motion was the primary cause of building destruction during the earthquake. [10] The highest peak ground acceleration, 0.20 g, was instrumentally measured 28 km (17 mi) south of the epicenter in Mae Sai, Thailand. This measurement was the highest ever recorded in Thailand from an earthquake. [11] Damage in Tarlay corresponded to a Modified Mercalli intensity (MMI) of VIII (Severe), [11] while damage to a road about 30 km (19 mi) from the epicenter was given MMI X (Extreme). [1]
The death toll in Myanmar stood at 74 to 150; [12] [13] 212 people were injured; [14] 3,152 made homeless; and 18,000 were affected. [15] At least 413 buildings were damaged and one bridge collapsed in Shan State. [2] Around 90 villages were moderately or heavily damaged; in 50 of those villages, more than half the building stock were damaged or destroyed. In 40 other villages, damage was more than 30 percent of all buildings. [15] At least 40 people died and 50 others were injured in Tarlay; one hospital collapsed in the town. [16] Ground subsidence of 1.5 m (4 ft 11 in) was observed at a bridge between Kengtung and Tachileik. In Tachileik, two people died and six were injured. [17] Twenty-five people died and 57 were injured when a Baptist church collapsed during a service in Kyakuni village. [18] In Monglin, at least 128 homes were razed. [19] Fourteen Buddhist monasteries and nine government infrastructure were damaged. [20]
In Mae Sai, Thailand, one person died when a wall collapsed. Sixteen people, including seven Burmese and five Chinese nationals were also injured. [21] Buildings in the district cracked and the spire of an 11th-century stupa toppled. No structural collapses occurred but ground effects such as liquefaction and lateral spreading were observed. The MMI in Mae Sai corresponded to VI (Strong). [11] Shaking also caused panic in Chiang Rai and Bangkok. [22] In Hanoi, Vietnam, windows shattered and some people evacuated from their homes. [23] Strong shaking was felt in the provinces of Luang Namtha and Bokeo in Laos without casualties or damage. In Xishuangbanna Prefecture, Yunnan, some homes and schools cracked. [24] Tall buildings were temporarily evacuated in Chiang Rai, Menghai County, Nanning and Hanoi. [25] [26]
On 28 March, The Irrawaddy reported many injured survivors at the Tachilek Hospital had "disappeared". The hospital was overwhelmed by an estimated 700 patients a day before the alleged disappearances. Remaining patients and hospital workers said the survivors were "sent away" by local authorities after journalists reported and distributed media on damage and casualties. Locals also reported up to 200 may have died in Shan State. [27]
Most residents in Tachileik spent the night outdoors after being advised by government officials about aftershocks through loudspeakers. Many people in the town did not return to their homes and businesses were closed. Authorities were hampered by road closures in their effort to locate some injured people in the affected areas. The United Nations Office for the Coordination of Humanitarian Affairs received reports of intermittent disruption of services including power, water and telecommunications. A damaged bridge at Tarlay made access to the town challenging for aid and rescue. [21]
More than US$3 million had been donated by various countries and organizations for the relief effort. [28] The government of Myanmar provided Ks 1,162 million worth of supplies to the area. [29] On 25 March, the Ministry of Social Welfare, Relief and Resettlement supplied relief tents, tarpaulins, blankets, clothing and food items via a military plane. [30] Two days later, government officials visited Tachilek and Tarlay, meeting affected residents. Affected families were also handled cash assistance, clothing and food. Patients at the Tachilek Station Hospital were also given cash. Government officials also surveyed repair works at the Kengtung–Tachilek Union Highway, Tachilek–Tahlay Road and Tahlay Bridge. By the afternoon of 27 March, buses and small vehicles could drive along the roads and bridge. [31]
The Chinese government provided US$500 thousand in disaster relief and reconstruction of damaged infrastructure. [32] On 26 March, the Thai government donated ฿3 million to the Burmese government and announced further assistance would be provided. [33] India's prime minister Manmohan Singh said his government would provide US$1 million for "relief and rehabilitation" in the affected area. [34] Korea also donated US$200 thousand to the Myanmar Red Cross Society. [35] Malteser International provided €10 thousand in emergency relief; at its Yangon warehouse, shelters and non-food items were prepared for 300 families. [36] World Vision distributed water and food to over 1,300 residents. [37]
The 2006 Yogyakarta earthquake occurred at 05:53 local time on 27 May with a moment magnitude of 6.4 and a maximum MSK intensity of VIII (Damaging) in the Yogyakarta region of Java, Indonesia.
The 1999 İzmit earthquake had a moment magnitude of 7.6 and struck Kocaeli Province, Turkey on 17 August. Between 17,127 and 18,373 people died as a result, and the damage was estimated at US$6.5 billion. It was named for the epicenter's proximity to the northwestern city of İzmit. The earthquake occurred at 03:01 local time at a shallow depth of 15 km (9.3 mi). A maximum Mercalli intensity of X (Extreme) was observed. The earthquake lasted for 37 seconds, causing seismic damage, and is widely remembered as one of the deadliest natural disasters in modern Turkish history.
An earthquake occurred in the province of Sichuan, China at 14:28:01 China Standard Time on May 12, 2008. Measuring at 8.0 Ms, the earthquake's epicenter was located 80 kilometres (50 mi) west-northwest of Chengdu, the provincial capital, with a focal depth of 19 km (12 mi). The earthquake ruptured the fault for over 240 km (150 mi), with surface displacements of several meters. The earthquake was also felt as far away as Beijing and Shanghai—1,500 and 1,700 km away, respectively—where office buildings swayed with the tremor, as well as Bangkok, Thailand and Hanoi, Vietnam. Strong aftershocks, some exceeding 6 Ms, continued to hit the area up to several months after the main shock, causing further casualties and damage. The earthquake also caused the largest number of geohazards ever recorded, including about 200,000 landslides and more than 800 quake lakes distributed over an area of 110,000 km2 (42,000 sq mi).
The 2002 Bou'in-Zahra earthquake occurred on 22 June 2002. The epicenter was near the city of Bou'in-Zahra in Qazvin Province, a region of northwestern Iran which is crossed by several major faults that is known for destructive earthquakes. The shock measured 6.5 on the Mwc scale, had a maximum Mercalli intensity of VIII (Severe), and was followed by more than 20 aftershocks. At least 230 people were killed and 1,500 more were injured.
The Sagaing Fault is a major fault in Myanmar, a mainly continental right-lateral transform fault between the Indian Plate and Sunda Plate. It links the divergent boundary in the Andaman Sea with the zone of active continental collision along the Himalayan front. It passes through the populated cities of Mandalay, Yamethin, Pyinmana, the capital Naypyidaw, Toungoo and Pegu before dropping off into the Gulf of Martaban, running for a total length of over 1200 kilometers.
The 2012 Shwebo earthquake occurred at 07:42 local time on 11 November in Myanmar. It had a magnitude of 6.8 on the moment magnitude scale and a maximum perceived intensity of VIII (Severe) on the Mercalli intensity scale. The epicenter was near the town of Male, 52 km NNE of the city of Shwebo, 64 km west of Mogok and 120 km north of Mandalay. Significant damage and possible casualties have been reported from near the epicenter, with up to 26 people dead and many more injured. Part of a bridge under construction fell into the Irrawaddy River near Shwebo and a gold mine collapsed at Sintku. An aftershock with a magnitude of 5.8 followed at 17:24 local time.
The 1930 Pyu earthquake occurred on December 4 at 01:21 local time. The epicenter was located north to Bago, Burma, then part of British India. The magnitude of the earthquake was estimated at Mw 7.3, or Ms 7.3.
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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.
The 2014 Ludian earthquake struck Ludian County, Yunnan, China, with a moment magnitude of 6.1 on 3 August. The earthquake killed at least 615 people, injuring at least 2,400 others. At least 114 people remained missing. Over 12,000 houses collapsed and 30,000 were damaged. According to the United States Geological Survey, the earthquake occurred 29 km (18 mi) west-southwest of Zhaotong city at 16:30 local time (08:30 UTC).
On 18 June 2018, around 7:58:35 a.m. Japan Standard Time, an earthquake measuring 5.6 Mw on the moment magnitude scale struck in northern Osaka Prefecture, Japan. The earthquake's epicenter was near Takatsuki and occurred at a depth of approximately 13 kilometres (8.1 mi). The Japan Meteorological Agency reported a magnitude of 6.1 Mj and an intensity of 6 lower on the shindo scale.
The 2019 Cotabato earthquakes were an earthquake swarm which struck the province of Cotabato on the island of Mindanao in the Philippines in October 2019. Three of these earthquakes were above 6.0 on the moment magnitude scale with a Mercalli intensity of VIII. More than 40 people have been reported dead or missing and nearly 800 were injured as a result of these events.
The 1988 Lancang–Gengma earthquakes, also known as the 11.6 earthquakes by the Chinese media were a pair of devastating seismic events that struck Lancang and Gengma counties, Yunnan, near the border with Shan State, Burma. The earthquake measured moment magnitude (Mw ) 7.0 and was followed 13 minutes later by a 6.9 Mw shock. These earthquakes were assigned a maximum China seismic intensity of IX and X, respectively. Between 748 and 939 people were killed; more than 7,700 were injured. Both earthquakes resulted in US$270 million in damage and economic losses. Moderately large aftershocks continued to rock the region, causing additional casualties and damage.
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 2020 Kashgar earthquake, also known as the Jiashi earthquake occurred on 19 January 2020 at 21:27:56 China Standard Time in Xinjiang Province, China. According to the United States Geological Survey, the earthquake had a moment magnitude of 6.0 and a surface wave magnitude of 6.4 according to the China Earthquake Network Center. It struck at a shallow depth of 5.6 km according to the USGS while the CENC has the figure at 16 km. Local emergency management agencies said the earthquake damaged more than 1,000 homes and businesses in the nearby populated towns and villages. One person is known to have died while two other children were injured.
The 1995 Menglian earthquake or 1995 Myanmar–China earthquake occurred on 12 July at 05:46:43 local time in the Myanmar–China border region. The earthquake had an epicenter on the Myanmar side of the border, located in the mountainous region of Shan State. It registered 7.3 on the Chinese surface wave magnitude scale (Ms ) and 6.8 on the moment magnitude scale (Mw ). With a maximum Mercalli intensity assigned at VIII, it killed 11 people and left another 136 injured. Over 100,000 homes in both countries were destroyed and 42,000 seriously damaged. Some damage to structures were also reported in Chiang Mai and Chiang Rai, Thailand. The low death toll from this earthquake was attributed to an early warning issued prior to it happening. Precursor events including foreshocks and some seismic anomalies led to an evacuation of the area before the mainshock struck. It is thought to be one of the few successfully predicted earthquakes in history.
On February 7, 2021, at 12:22 PM PST, an earthquake measuring Mww 6.0 struck Davao del Sur and Cotabato. The event registered a Modified Mercalli Intensity Scale (MMI) of VIII (Severe) with VII on the PHIVOLCS Earthquake Intensity Scale (PEIS).
The 1997 Bojnurd earthquake occurred on 4 February at 14:07 IRST in Iran. The epicenter of the Mw 6.5 earthquake was in the Kopet Dag mountains of North Khorasan, near the Iran–Turkmenistan border, about 579 km (360 mi) northeast of Tehran. The earthquake is characterized by shallow strike-slip faulting in a zone of active faults. Seismic activity is present as the Kopet Dag is actively accommodating tectonics through faulting. The earthquake left 88 dead, 1,948 injured, and affected 173 villages, including four which were destroyed. Damage also occurred in Shirvan and Bojnord counties. The total cost of damage was estimated to be over US$ 30 million.
The 1933 Sumatra earthquake or Liwa earthquake occurred in West Lampung Regency, Lampung Province, Indonesia on June 25. The earthquake had an estimated surface-wave magnitude (Ms ) of 7.7 occurring at a shallow depth of 20 km. It had an epicenter onshore, devastating the city of Liwa. At least 788 people were reported killed, although the death toll may have been in the thousands. Aftershocks followed, including one which was strong enough to cause additional fatalities. The mainshock also triggered a nearby volcanic eruption two weeks later, killing some people.
The 1992 Joshua Tree earthquake occurred at 9:50:25 p.m. PDT on April 22 in Southern California. The magnitude 6.2 earthquake struck under the Little San Bernardino Mountains, near the town of Joshua Tree, California. Though no deaths were reported, the earthquake caused 32 injuries. A maximum Mercalli intensity of VII was observed in Joshua Tree and caused light to moderate damage. The event preceded the Landers and Big Bear earthquakes by two months but is now recognized as the beginning of a series of major earthquakes that culminated in two events on June 28, 1992.
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