EARTHQUAKE STATISTICS

Japan earthquake statistics for October 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 events136

Highest ShindoShindo 4

Largest magnitudeM6.6

Events with tsunami status3

Average magnitude3.5

Average depth34.2 km

The JISHINDESU catalogue contains 136 events for this period. The largest was M6.6, 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

Oct 17
Oct 24
Oct 36
Oct 43
Oct 54
Oct 63
Oct 73
Oct 84
Oct 99
Oct 103
Oct 115
Oct 124
Oct 135
Oct 145
Oct 151
Oct 168
Oct 172
Oct 183
Oct 194
Oct 206
Oct 215
Oct 224
Oct 236
Oct 248
Oct 255
Oct 264
Oct 271
Oct 285
Oct 294
Oct 302
Oct 313

EARTHQUAKE STATISTICS

Events by maximum Shindo

Shindo 191 · 68.4%
Shindo 232 · 24.1%
Shindo 39 · 6.8%
Shindo 41 · 0.8%

EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.