EARTHQUAKE STATISTICS

Japan earthquake statistics for April 2023

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 events144

Highest ShindoShindo 4

Largest magnitudeM5.6

Events with tsunami status0

Average magnitude3.5

Average depth32.1 km

The JISHINDESU catalogue contains 144 events for this period. The largest was M5.6, 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 112
Apr 25
Apr 34
Apr 48
Apr 57
Apr 64
Apr 74
Apr 85
Apr 95
Apr 106
Apr 112
Apr 128
Apr 136
Apr 144
Apr 155
Apr 163
Apr 174
Apr 182
Apr 191
Apr 203
Apr 216
Apr 225
Apr 233
Apr 246
Apr 255
Apr 262
Apr 275
Apr 284
Apr 293
Apr 307

EARTHQUAKE STATISTICS

Events by maximum Shindo

Shindo 187 · 60.4%
Shindo 243 · 29.9%
Shindo 312 · 8.3%
Shindo 42 · 1.4%

EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.