EARTHQUAKE STATISTICS

Japan earthquake statistics for April 2018

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 events170

Highest ShindoShindo 5+

Largest magnitudeM5.8

Events with tsunami status0

Average magnitude3.4

Average depth24.4 km

The JISHINDESU catalogue contains 170 events for this period. The largest was M5.8, 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

Apr 13
Apr 24
Apr 37
Apr 42
Apr 53
Apr 63
Apr 72
Apr 83
Apr 931
Apr 103
Apr 113
Apr 128
Apr 134
Apr 149
Apr 156
Apr 1619
Apr 171
Apr 184
Apr 194
Apr 204
Apr 213
Apr 226
Apr 236
Apr 241
Apr 254
Apr 263
Apr 272
Apr 2810
Apr 299
Apr 303

EARTHQUAKE STATISTICS

Events by maximum Shindo

Shindo 1102 · 60%
Shindo 246 · 27.1%
Shindo 314 · 8.2%
Shindo 46 · 3.5%
Shindo 5−1 · 0.6%
Shindo 5+1 · 0.6%

EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.