Catalogue time, not a wave simulation
The replay reveals reports at their recorded JST origin times. Station dots show observed Shindo, but the moment they appear is not a measured seismic-wave arrival time.
DAILY EARTHQUAKE ARCHIVE
Earthquakes in Japan on March 20, 2021
Replay earthquakes recorded on this day at their actual occurrence times and inspect every available report.
- earthquakes
- 18
- strongest Shindo
- 5+
- largest magnitude
- M7.2
- Shindo 1+ events
- 18
Replay one day of earthquakes
2021-03-20 · JST00:00:00Pause
Shindo12345−5+6−6+7
00:0006:0012:0018:0024:00
JISHINDESU catalogue organised from JMA and P2PQuake data. Times use JST. Points are reported epicentres and observations, not simulated wave propagation.
How to read the record for March 20, 2021
The JISHINDESU catalogue contains 18 earthquakes for this day; 18 reached maximum Shindo 1 or higher. The day's highest Shindo was 5+, and its largest reported magnitude was M7.2.
Earthquake with the day's highest ShindoOff the Coast of Miyagi Prefecture18:09:00 JST · M7.2 · Shindo 5+→01 02 03
Shindo and magnitude measure different things
Magnitude describes the earthquake at its source; Shindo describes shaking at each station. One earthquake can therefore produce different Shindo readings by location.
Shindo and magnitude explained →A record can be updated later
Follow-up bulletins and corrections for the same earthquake are consolidated into one record. Each report page shows the current values and any available revision history.
Data and methodology →JISHINDESU ON YOUR PHONE
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This page preserves one past day. In the app, save your home, family or destination and check locally observed Shindo when a new earthquake is reported.
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Earthquake reports
18 earthquakes · Shindo 5+ · M7.2
March 20, 2021
- 震度3Kumamoto Region, Kumamoto Prefecture熊本県熊本地方01:50 JSTconfirmedM4.0Depth: 10 km
- 震度1Off the south Coast of Boso Peninsula房総半島南方沖02:28 JSTconfirmedM4.2Depth: 30 km
- 震度2Off the Coast of Iwate Prefecture岩手県沖09:26 JSTconfirmedM4.7Depth: 30 km
- 震度5+Off the Coast of Miyagi Prefecture宮城県沖18:09 JSTconfirmedM7.2Depth: 60 km
- 震度2Off the Coast of Miyagi Prefecture宮城県沖18:18 JSTconfirmedM4.2Depth: 60 km
- 震度2Off the Coast of Miyagi Prefecture宮城県沖18:26 JSTconfirmedM4.2Depth: 50 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖18:29 JSTconfirmedM3.7Depth: 60 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖18:35 JSTconfirmedM4.0Depth: 60 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖19:12 JSTconfirmedM3.5Depth: 50 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖19:22 JSTconfirmedM3.6Depth: 60 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖19:25 JSTconfirmedM3.4Depth: 50 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖19:37 JSTconfirmedM3.8Depth: 60 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖19:39 JSTconfirmedM3.9Depth: 60 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖20:45 JSTconfirmedM3.3Depth: 60 km
- 震度2Northern Wakayama Prefecture和歌山県北部20:50 JSTconfirmedM2.5Depth: 10 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖20:55 JSTconfirmedM3.4Depth: 60 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖22:02 JSTconfirmedM3.6Depth: 50 km
- 震度1Off the Coast of Miyagi Prefecture宮城県沖23:35 JSTconfirmedM3.3Depth: 60 km