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EARTHQUAKE STATISTICS

Japan earthquake statistics for September 2023

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

Full periodData updated:

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

Catalogue events406
Highest ShindoShindo 4
Largest magnitudeM6.4
Events with tsunami status0
Average magnitude3.1
Average depth25.8 km

The JISHINDESU catalogue contains 406 events for this period. The largest was M6.4, 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

  • Sep 22
  • Sep 35
  • Sep 43
  • Sep 512
  • Sep 62
  • Sep 75
  • Sep 891
  • Sep 9152
  • Sep 1024
  • Sep 1121
  • Sep 129
  • Sep 133
  • Sep 147
  • Sep 1512
  • Sep 164
  • Sep 172
  • Sep 186
  • Sep 195
  • Sep 203
  • Sep 212
  • Sep 225
  • Sep 233
  • Sep 243
  • Sep 253
  • Sep 264
  • Sep 274
  • Sep 285
  • Sep 295
  • Sep 304
EARTHQUAKE STATISTICS

Events by maximum Shindo

  • Shindo 1267 · 65.8%
  • Shindo 2102 · 25.1%
  • Shindo 333 · 8.1%
  • Shindo 44 · 1%
EARTHQUAKE STATISTICS

Largest events by magnitude

Place names follow the available source or romanised name.

  1. Shindo3Off the northwest Coast of Miyakojima IslandM6.4170 km
  2. Shindo2Off the southeast Coast of Etorofu IslandM5.910 km
  3. Shindo4Off the Coast of Miyagi PrefectureM5.560 km
  4. Shindo4Off the Coast of Miyagi PrefectureM5.550 km
  5. Shindo4Adjacent Sea of Tokara IslandsM5.330 km
  6. Shindo1Adjacent Sea of Torishima IslandM5.2460 km
  7. Shindo3Adjacent Sea of Tokara IslandsM5.030 km
  8. Shindo4Off the northwest Coast of Amami- Oshima IslandM5.020 km
  9. Shindo3Off the Coast of Fukushima PrefectureM4.850 km
  10. Shindo2Adjacent Sea of Amami-Oshima IslandM4.750 km