Zhongwei-Tongxin fault is one of the major " arcuate active fault zones in northeastern margin of Tibetan plateau " . Six paleoearthquake events in the past 14,000 years have been recorded along the Zhongwei-Tongxin fault zone . Among the earthquakes recorded are the 1622 North Guyuan earthquake , which had a magnitude of 7.0 and mid-seismogenic depth of about , the 1709 Zhongwei earthquake , which had a magnitude of 7.5 , and the 1920 Haiyuan earthquake with 7.8
1920 Haiyuan earthquake
1920 Haiyuan earthquake
Zhongwei-Tongxin fault