1622 North Guyuan earthquake

The 1622 North Guyuan earthquake struck Ningxia, China on 25 October with a magnitude of 7.0 M_s and a maximum Mercalli intensity of X (Extreme). It was the only recorded big earthquake in western China for 148 years, between 1561 and 1709.^[2] The earthquake occurred on the "rake of the Zhongwei-Tongxin fault", with a mid-seismogenic depth of about 15 kilometres (9.3 mi).^[3]

LocaldateOctober 25, 1622 (1622-10-25)

Magnitude7.0 M_s^[1]

Epicenter36.5°N 106.3°E / 36.5; 106.3^[1]

Max. intensityMMI X (Extreme)^[1]

Quick facts Local date, Magnitude ...

1622 North Guyuan earthquake

Local date	October 25, 1622 (1622-10-25)
Magnitude	7.0 Ms[1]
Epicenter	36.5°N 106.3°E / 36.5; 106.3[1]
Max. intensity	MMI X (Extreme)[1]
Casualties	12,000[1]

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