This article documents a current event. Information may change rapidly as the event progresses, and initial news reports may be unreliable. The latest updates to this article may not reflect the most current information.(January 2025) |
UTC time | 2025-01-07 01:05:16 |
---|---|
ISC event | 642702740 |
USGS-ANSS | ComCat |
Local date | 7 January 2025 |
Local time | 09:05 CST (UTC+8) |
Magnitude | Mw 7.1 Ms 6.8 |
Depth | 10.0 km (6.2 mi) |
Epicenter | 28°38′20″N87°21′40″E / 28.639°N 87.361°E |
Type | Normal |
Areas affected | Southwestern China, Nepal and India |
Max. intensity | CSIS IX MMI IX (Violent) |
Foreshocks | mb 4.1 [1] |
Aftershocks | 515+ [2] Strongest: mb 5.1 [3] |
Casualties | 126 fatalities, 201 injuries |
On 7 January 2025 at 09:05 CST (UTC+8), an earthquake measuring Mw 7.1 or Ms 6.8 struck Tingri County, located in the Shigatse prefecture-level city of the Tibet Autonomous Region of southwestern China. [4] At least 126 people were killed while 188 others were injured in the region. The earthquake also injured 13 people in Nepal and caused minor damage in northern India. Shaking was felt across South Asia. The earthquake was the largest in China since May 2021 and the deadliest since December 2023. [5] [6] It was caused by noral faulting and originated within the continental crust at 10 km (6.2 mi) depth.
The Tibetan plateau attains its high elevation due to crustal thickening caused by the collision of the Indian tectonic plate with the Eurasian plate, creating the Himalayas. [7] Faulting within the plateau is associated with strike-slip and normal mechanisms. The plateau extends in an east–west direction along evidenced by north–south striking grabens, strike-slip faulting and GPS data. [8] In the northern region, strike-slip faulting constitutes the dominant style of tectonics while in the south, the dominant tectonic domain is east-west extension on north–south trending normal faults. [9]
The largest earthquakes in Tibet, with magnitudes of 8.0 or similar, occur along strike-slip faults. Normal faulting earthquakes are smaller in magnitudes; in 2008, five normal faulting earthquakes with magnitudes of 5.9 to 7.1 occurred in various locations across the plateau. These earthquakes occurred on faults with dip angles of 40 to 50 degrees and extended to a depth of 10 to 15 km (6.2 to 9.3 mi). [8]
A 2010 study in Geophysical Journal International observed within the past 43 years, 85 percent of seismic moment released during normal faulting occurred in areas of more than 5 km (3.1 mi) elevation. This may suggest normal faulting earthquakes are dependent on gravitational potential energy to trigger these ruptures. [8]
The United States Geological Survey said that the earthquake measured a moment magnitude (Mww ) of 7.1, while the China Earthquake Networks Center reported its magnitude at Ms 6.8. The shock occurred at 10 km (6.2 mi) depth, indicating it occurred within the continental crust that forms the Tibetan Plateau. [10] It was caused by normal faulting with a minor strike-slip component. [11] Focal mechanism solutions indicate that the rupture occurred on a north-south striking fault, dipping moderately to either to the east or west. [4] The epicenter was located at Tsogo Township in Tingri County, an area with an average altitude of 4,500 m (14,800 ft). [12] Moment magnitude and surface wave magnitude (Ms) are two slightly different ways to measure the strength of an earthquake; moment magnitude is more recently developed to measure total energy released by the earthquake. [13]
Modelling of the rupture by the United States Geological Survey revealed motion along a north–northeast striking fault dipping west–northwest or north–northwest striking fault dipping east–northeast. In both solutions, co-seismic slip occurred for about 80 km (50 mi) along strike and extended to 20 km (12 mi) depth. The maximum slip in these solutions were 1.6 m (5 ft 3 in) and 1.3 m (4 ft 3 in), respectively. A rupture area of about 80 km (50 mi) x 20 km (12 mi) was estimated, extending from Ngamring County to southern Tingri County near the border with Nepal. [4] Seismologists at the China Earthquake Networks Center said the mainshock originated within the Lhasa terrane, a crustal block that forms part of the plateau. [14] Geologic activity causes north–south compression and east−west extension within the plateau which are accommodated by faults. [15]
The China Earthquake Administration evaluated that the enture rupture occurred within 23 seconds, releasing a seismic moment estimated at 4.0469 × 1019 Nm. However, the greatest moment release occurred 13 seconds after the rupture initiated. The rupture propagated bilaterally along a normal fault, but most of it was directed northward. The institution also determined that there was a high likelihood of surface rupture. [11] Surface ruptures were later mapped via satellite imagery; they occurred on the eastern shores of Dengme Co lake discontinuously for 11 km (6.8 mi). These ruptures exhibited normal faulting characteristics. [16]
The Chengdu University of Technology reported a maximum China seismic intensity scale of IX, which was recorded in six townships within an area of 671 km2 (259 sq mi), including Chamso, Cogo, Gyaco and Qulho Township. Intensity VIII was felt in Dinggyê, Lhatse and Sa'gya Counties within a 2,917 km2 (1,126 sq mi) area. Since 1949, 37 earthquakes of Ms 5.0–5.9, 7 of Ms 6.0–6.9, and 1 of Ms 7.0–7.9 have been recorded within 200 km (120 mi) of the epicentre. It was the deadliest earthquake in the immediate area since a Ms 6.6 event occurred in Yadong County on 20 November 1980. That earthquake had an epicenter 176 km (109 mi) away and killed 3 people in the county. The 7 January 2025 earthquake was also the largest in the area since a Ms 7.1 struck 171 km (106 mi) to the south on 26 April 2015. [17]
The tremor was widely felt in much of South Asia, reaching Kathmandu, the capital of Nepal, approximately 400 km (250 mi) from the epicenter, where residents fled their homes in fear. Strong shaking was also experienced in areas near Mount Everest, including Lobuche and Namche. The earthquake's effects extended to Thimphu in Bhutan, and the northern Indian states of Bihar, Assam, and West Bengal. [18] Shaking was also felt in Dhaka, Bangladesh and other parts of the country. [19] At least 515 aftershocks followed the mainshock. [2]
The earthquake killed at least 126 people, injured 188, [20] and collapsed more than 3,600 homes in Tibet. [21] Fatalities occurred in Tingri, Lhatse and Sa'gya Counties. More than 1,000 homes collapsed in Tingri county. [22] In Lhatse County, debris covered streets and vehicles, [23] and a hotel was damaged. [24] More than 170 China Mobile stations were disabled by the earthquake, although mobile services were restored nine hours later. [21] In Nepal, 13 people were injured, including 11 in Bara, and one each from Kavrepalanchok and Kathmandu. Two homes were destroyed, and 12 others and a police station were damaged across the country. [25] [26] [27] In Bihar, India, several homes were slightly damaged in Samastipur district. [28]
Following the earthquake, more than 3,400 rescue personnel, 340 medical workers, [29] 75 vehicles, four search dogs and 7,030 sets of equipment were dispatched to the epicentre. [30] The China Meteorological Administration issued a level-three emergency alert for the area. [31] To prevent further casualties during potential aftershocks, residents were evacuated. Local officials also allocated resources from the transport, water and village administrative departments to aid in rescue efforts. [32] The State Council's Earthquake Relief Command and the Ministry of Emergency Management, in conjunction with the National Food and Strategic Reserves Administration, distributed 22,000 units of centralised relief supplies, including cotton tents, cotton coats, quilts, and folding beds, as well as specialised relief materials for high-cold and high-altitude regions to the affected areas. [33] The national air force also participated in rescue efforts and sent drones to the area. [34] Air cargo, medical services, ground forces, and helicopters of the Western Theater Command Air Force were deployed. [35]
Temperatures in the area at the time of the earthquake were estimated to have been −8 °C (18 °F), and were expected to fall to −16 °C (3 °F) by night. [36] The Western Theater Command of the People's Liberation Army was also mobilised to assist in relief efforts. [37] The China Center for Resources Satellite Data and Application deployed eight satellites to monitor the area. [38] The Mount Qomolangma scenic area was temporarily closed and 530 visitors were evacuated. [39] [40]
Chinese President Xi Jinping "ordered all-out rescue efforts". He urged the relevant bodies to treat the injured, repair damaged infrastructure, and relocate those displaced. [41] The Chinese government said it would allocate 100 million yuan ($13.6 million) for disaster relief. [20] In Nepal, security forces were deployed to areas affected by the earthquake. [42]
At 14:00 on 7 January, 30 officers and soldiers from the People's Armed Police Tibet Contingent arrived in the earthquake-affected region of Shigatse, while 359 other officers and soldiers hastened to the disaster zone. [43] [44] By the evening, China Central Television reported that more than 400 people were rescued, 14 housing areas were established, and at least 30,400 were relocated. All damaged roads were also reopened. [45] The initial consignment of over 5,800 cotton tents, garments, quilts, and other central relief supplies has reached the earthquake-affected regions of Tingri County, while the remaining more than 16,000 central relief items arrived in the disaster-impacted areas on the 8th. [46]
Shigatse, officially known as Xigazê or Rikaze, is a prefecture-level city of the Tibet Autonomous Region of the People's Republic of China. Its area of jurisdiction, with an area of 182,000 km2 (70,271 sq mi), corresponds to the historical Ü-Tsang region of Tibet.
Nyalam County is a county in Shigatse, Tibet, China. It borders on Nepal.
Gertse County, Gêrzê County or Gaize County is a county located in Ngari Prefecture in the northwest of the Tibet Autonomous Region, China, bordering Xinjiang to the north.
Tingri County is a county under the administration of the prefecture-level city of Xigazê in the Tibet Autonomous Region of China.
Dinggyê County is a county of the Xigazê city in the Tibet Autonomous Region, China, bordering Nepal's Sankhuwasabha and Taplejung Districts to the south and India's Sikkim state to the southeast. Jin Co and Duolo Co are located in this county.
The 1920 Haiyuan earthquake occurred on December 16 in Haiyuan County, Ningxia Province, Republic of China at 19:05:53. It was also called the 1920 Gansu earthquake because Ningxia was a part of Gansu Province when the earthquake occurred. It caused destruction in the Lijunbu-Haiyuan-Ganyanchi area and was assigned the maximum intensity on the Mercalli intensity scale. About 258,707-273,407 died, making it one of the deadliest earthquakes in China and disasters in China by death toll.
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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).
The 2014 Jinggu earthquake occurred on October 7, 2014, at 21:49 (UTC+8).
The 2014 Kangding earthquake struck Kangding County, Garzê Tibetan Autonomous Prefecture, Sichuan, China, with a moment magnitude of 5.9 on 22 November. The earthquake killed five and injured 54 people.
The 2017 Jiuzhaigou earthquake occurred on 8 August 2017, in Zhangzha Town, Jiuzhaigou County, Ngawa Prefecture, Sichuan Province, China. The earthquake was registered at Ms 7.0 and killed at least 25 people in the mountainous region of northern Sichuan.
The G4218 Ya'an-Yecheng Expressway, commonly referred to as the Yaye Expressway, is an expressway that will traverse the entirety of Tibet and link Ya'an in Sichuan to Yecheng in Xinjiang.
Shigatse Tingri Airport, also called Rikaze Tingri Airport is a high-altitude airport in Tingri County, Shigatse, Tibet Autonomous Region. Construction began in August 2019 and the airport was opened in December 2022.
The 2021 Luxian earthquake was a damaging seismic event occurring in the early hours of September 16 at 04:33 China Standard Time. The surface-wave magnitude (Ms ) 6.0 or moment magnitude (Mw ) 5.4 earthquake struck at a shallow depth of 7.5 km and severe shaking in an area of 4,000 square kilometers was assigned a maximum intensity of VIII on the China seismic intensity scale. Three people were killed and 146 injured when the earthquake struck Lu County, Luzhou, Sichuan Province. At least 36,800 buildings were affected, 7,800 of them seriously damaged or completely destroyed, causing about a quarter of a billion dollars worth of damage.
On June 1, 2022, a moment magnitude (Mw ) 5.8 or surface-wave magnitude (Ms ) 6.1 earthquake struck Lushan County in Ya'an, Sichuan Province, China. At least four people were killed and 42 were injured. The earthquake had a maximum intensity of VIII on the China seismic intensity scale, causing damage to many homes and triggering rockslides.
A Mw 6.7 earthquake struck Luding County in Sichuan province, China on 5 September 2022 at 12:52:19 local time. The epicenter was located 226 km (140 mi) from Chengdu, or 43 km (27 mi) southeast of Kangding. Ninety-three people died, 424 were injured and 24 remained missing. More than 13,000 homes and other infrastructure were damaged or destroyed. It was the largest earthquake to strike the province since 2017.
Shigatse People's Hospital, is the largest public hospital in Shigatse, located in South Jilin Road.
Bainang Vegetable Production Base, located in Bainang County, Shigatse City, Tibet Autonomous Region, China, stands as the largest vegetable production base in the region and serves as a vital grain and vegetable supplier for Tibet.
Tibet Laluo Water Conservancy Project, or Laluo Water Conservancy Hub and Associated Irrigation District Project, Tibet Laluo Water Conservancy Hub and Supporting Irrigation District Project, Laluo Reservoir, is in Laluo Township, Sa'gya County, Shigatse City, on the right bank of the Yarlung Zangbo River.
Moment is a physical quantity proportional to the slip on the fault multiplied by the area of the fault surface that slips; it is related to the total energy released in the earthquake.