EARTHQUAKE STATISTICS

Japan earthquake statistics for September 2021

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

Full periodData updated: Nov 7, 2026, 10:59 JST

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

Catalogue events145

Highest ShindoShindo 5−

Largest magnitudeM6.5

Events with tsunami status0

Average magnitude3.4

Average depth33.7 km

The JISHINDESU catalogue contains 145 events for this period. The largest was M6.5, with maximum Shindo 5−.

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

Sep 16
Sep 27
Sep 31
Sep 42
Sep 53
Sep 66
Sep 74
Sep 82
Sep 93
Sep 102
Sep 114
Sep 124
Sep 1310
Sep 142
Sep 155
Sep 166
Sep 176
Sep 182
Sep 1914
Sep 208
Sep 216
Sep 221
Sep 232
Sep 247
Sep 252
Sep 261
Sep 2713
Sep 284
Sep 296
Sep 306

EARTHQUAKE STATISTICS

Events by maximum Shindo

Shindo 191 · 62.8%
Shindo 236 · 24.8%
Shindo 316 · 11%
Shindo 41 · 0.7%
Shindo 5−1 · 0.7%

EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.