EARTHQUAKE STATISTICS

Japan earthquake statistics for April 2021

Catalogue events, magnitude, maximum Shindo, depth and tsunami statuses for the same reporting period.

Full periodData updated: Nov 7, 2026, 11:00 JST

This is a completed period, although later additions and corrections can still revise totals.

Catalogue events387

Highest ShindoShindo 4

Largest magnitudeM5.8

Events with tsunami status0

Average magnitude3.1

Average depth22.2 km

The JISHINDESU catalogue contains 387 events for this period. The largest was M5.8, with maximum Shindo 4.

How these statistics are calculated

We count unique earthquake records in the JISHINDESU catalogue. Corrections update the same record and cancellations follow the current catalogue state. Dates use JST; averages include records where that value exists. The tsunami count covers statuses other than ‘none’.

EARTHQUAKE STATISTICS

Events through the period

Apr 14
Apr 24
Apr 34
Apr 42
Apr 58
Apr 63
Apr 74
Apr 85
Apr 96
Apr 1094
Apr 1180
Apr 1237
Apr 1312
Apr 1411
Apr 158
Apr 1614
Apr 177
Apr 1812
Apr 197
Apr 206
Apr 2119
Apr 225
Apr 236
Apr 2410
Apr 252
Apr 264
Apr 272
Apr 283
Apr 293
Apr 305

EARTHQUAKE STATISTICS

Events by maximum Shindo

Shindo 1241 · 62.3%
Shindo 2101 · 26.1%
Shindo 339 · 10.1%
Shindo 46 · 1.6%

EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.