EARTHQUAKE STATISTICS

Japan earthquake statistics for October 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 events115

Highest ShindoShindo 5+

Largest magnitudeM6.1

Events with tsunami status0

Average magnitude3.5

Average depth34.8 km

The JISHINDESU catalogue contains 115 events for this period. The largest was M6.1, 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

Oct 12
Oct 21
Oct 38
Oct 42
Oct 54
Oct 610
Oct 77
Oct 82
Oct 97
Oct 105
Oct 113
Oct 122
Oct 132
Oct 144
Oct 154
Oct 166
Oct 172
Oct 185
Oct 193
Oct 205
Oct 215
Oct 222
Oct 233
Oct 241
Oct 253
Oct 264
Oct 273
Oct 285
Oct 292
Oct 313

EARTHQUAKE STATISTICS

Events by maximum Shindo

Shindo 168 · 59.1%
Shindo 231 · 27%
Shindo 311 · 9.6%
Shindo 43 · 2.6%
Shindo 5+2 · 1.7%

EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.