Magnitude 7 earthquake in Tibet kills at least 16 people

The map includes the Nagqu earthquake as a highlighted reference, even though its magnitude of 7.0 is below the M8 threshold of the historical selection. That difference is a clue in itself: the quake was strong enough to collapse hundreds of homes, but it is not part of the club of great earthquakes since 1700. The comparison helps make sense of the scale without playing down the impact.

What happened

The quake struck at 10.33pm Beijing time (14:33 UTC) on Thursday 22 October. The epicentre was in Maru township, Baqen county, Nagqu city, about 191 kilometres east-northeast of Nagqu and 390 kilometres northeast of Lhasa, according to the US Geological Survey (USGS). The area is mountainous, sparsely populated and has an average altitude of about 4,800 metres, according to China's Ministry of Emergency Management as cited by Shanghai Daily.

At 2.25am Beijing time on Friday, the official toll was 16 dead and 32 injured — 11 seriously and 21 slightly — with 339 homes collapsed, according to Xinhua, citing Nagqu's emergency management department. A later CCTV update put the number of injured at 46: 11 seriously and 35 slightly. The toll remains provisional and the authorities say damage is still being assessed.

More than 1,600 people from the county were deployed for rescue, according to AP. The regional fire and rescue corps sent 347 personnel and the police more than 300, according to Xinhua. Some 1,000 prefabricated housing units, about 3,000 tents, folding beds, torches and winter clothing also arrived. Communications were cut in some areas, railway authorities halted trains and a section of National Highway 317 was closed because of rockfalls.

The USGS recorded at least seven aftershocks between magnitude 4.3 and 5.2. Intermittent snow is forecast for the next three days, which could complicate the search for survivors and the delivery of supplies in an area that is hard to reach. State broadcaster CCTV said it was the strongest earthquake in the region for five years.

The map: the great earthquakes and Nagqu

The map brings together 104 historical earthquakes of magnitude 8 or above and highlights the 2026 Nagqu earthquake (M7.0) in blue. Icon size increases with magnitude; colour distinguishes the historical events (red) from the recent one (blue). Each dot sits at the real epicentre listed in the USGS catalogue, and the pop-up adds depth, date and event code.

In the broad collision zone between India and Eurasia, the map includes three earthquakes: Kemin (Kyrgyzstan, 1911), at 8.02 and 20 kilometres deep; Bihar-Nepal (1934), at 8.0 and 15 kilometres; and Assam-Tibet (1950), at 8.6 and 15 kilometres. The last is the closest in magnitude and geological setting: the map card describes it as one of the most powerful continental earthquakes of the 20th century, in the tectonic zone between Assam and Tibet.

The difference in magnitude is not a detail. The scale is logarithmic, and a 7.0 releases much less energy than an 8.6, but it can cause serious damage if the hypocentre is shallow and homes are not prepared. The USGS puts the Nagqu quake at 18 kilometres deep; the China Earthquake Networks Centre (CENC) puts it at 10. Both are shallow. The map cannot say which is more accurate or how strongly the ground shook in each village; intensity reports and response data are needed for that.

How to read the map

Each dot is an earthquake, not a region. The legend distinguishes historical M≥8 earthquakes (red) from the Nagqu event (blue); icon size increases with magnitude. Click to open a card with magnitude, depth, date, place and USGS code. The map covers 1700 to 2026 and includes the 104 events of magnitude 8 or above plus the 7.0 Nagqu quake as a reference, so it is not a complete catalogue of global seismicity: it is a selection of the largest recorded earthquakes.

The legend no longer uses a magnitude ramp: colour separates the two categories and size still encodes magnitude. For modern large earthquakes, the USGS publishes moment magnitude (Mww), which is the value in the data. Historical magnitudes and depths are revised over time and catalogues before 1900 are less complete. The dots do not represent the rupture area or the extent of damage.

What the map does not say

The map says nothing about housing quality, population density, soil type, rupture depth or response capacity. Nor does it allow a comparison of death tolls between countries: two earthquakes of similar magnitude can have very different consequences depending on where they strike and how buildings are constructed. In Nagqu, the figure of 339 homes collapsed or damaged comes from local authorities, not from the map.

Nor does it forecast what comes next. A map of historical earthquakes does not predict aftershocks or show that the region will suffer another great quake in the short term. The fact that Nagqu lies in the same collision zone as Assam-Tibet does not turn the two events into a sequence. The link is context, not cause.

What comes next

The coming hours will be dominated by the search for people trapped, damage assessment and the delivery of supplies before snow complicates access. Aftershocks may continue; the USGS has already recorded several above magnitude 4. The Chinese authorities have activated an emergency response and rescue teams remain deployed around the epicentre.

The death toll and the number of affected homes remain open. Damage assessment is still under way, according to Xinhua. The USGS catalogue is the source that can be followed most precisely: it updates magnitude, depth and aftershocks as data arrive.