On April 21, 1935, the magnitude 7.1 earthquake in Taichung, Taiwan
At 06:02 local time on April 21, 1935, a 7.1 magnitude earthquake occurred north of Taichung City, Taiwan, and 6 strong aftershocks occurred in Hsinchu County, Taiwan 12 seconds after the main earthquake, and the entire island of Taiwan was strongly felt at the time of the earthquake, and there were also obvious earthquakes in the coastal areas of Fujian, China.
The devastating earthquake was the deadliest ever recorded in Taiwan, killing at least 3,276 people, injuring 12,053, destroying 17,907 homes and damaging 36,781. The infrastructure of the entire island of Taiwan has suffered severe damage, with severe damage to transportation, communications, water supply networks. A few hours before the main quake, there were reports of precursors of well water boiling near the epicenter.
On April 21, 1977, the Solomon Islands received three consecutive earthquakes of magnitude 7.5
On April 21, 1977, at 07:42, 07:49 and 12:24, there were successive earthquakes of magnitude 7.5, magnitude 7.5 and magnitude 7.5 in Guadalcanal in the Solomon Islands, and a magnitude 6.7 foreshock half an hour before the three earthquakes, which killed at least 52 people, but the earthquake did not cause a widespread destructive tsunami.