October 5, 2023 Earthquake: Izu Islands, Japan
A magnitude 6.1 earthquake struck Izu Islands, Japan on October 5, 2023 at 01:59:58 UTC, 10 km below the surface. It caused a tsunami.
Map
Where it struck, with the other significant earthquakes within 200 km. Circles are sized and colored by magnitude; select one for its page.
The earthquake
- Date
- October 5, 2023
- Time
- 01:59:58 UTC
- Place
- Izu Islands, Japan
- Magnitude
- 6.1 (Mw)
- Focal depth
- 10 km (6 mi)
- Tsunami
- Yes: the tsunami it caused
- Epicenter
- 29.940° N, 139.950° E
- Country
- Japan
- Region
- East Asia
- USGS record
- The USGS’s page for this earthquake
The toll
The record gives no deaths, injuries or damage for this earthquake.
What happened
The USGS’s account of the effects of this earthquake.
A tsunami with a wave height of 30 cm was recorded on Hachijo Jima.
From the USGS event page for us6000lcz1. U.S. Geological Survey text and figures are in the public domain.
Magnitude estimates
The magnitudes the USGS catalog lists for this earthquake, by scale and by who computed them. NCEI’s own scales are in the table above.
| Mag. | Scale | Computed by | Notes |
|---|---|---|---|
| 6.1 | Mww, W-phase moment | USGS National Earthquake Information Center | Preferred · Reviewed · ±0.041 · 57 stations |
| 6.3 | Mi | NOAA Pacific Tsunami Warning Center | First automatic solution · Reviewed · 17 stations |
| 6.1 | Mi | NOAA National Tsunami Warning Center | First automatic solution · Reviewed · 5 stations |
| 6.0 | Mwb, body-wave moment | USGS National Earthquake Information Center | Moment tensor · Reviewed |
| 6.1 | Mww, W-phase moment | USGS, automatic first solution | First automatic solution · Preliminary |
Sources NCEI cites
The publications NCEI lists for this record. The numbers match the “reference #” notes in its account above.
- #13456 U.S. Geological Survey (2017 to present). Earthquake Hazards Program, Advanced National Seismic System (ANSS) Comprehensive Catalog of Earthquake Events and Products.
Other significant earthquakes nearby
Within 200 km, the deadliest first.
- October 6, 2023, Izu Islands, Japan
- October 8, 2023, Izu Islands, Japan
- October 23, 2006, Izu Islands, Japan
- January 1, 2006, S. of, Honshu, Japan
- June 13, 1984, Tori Shima, Okinawa, Japan
- May 6, 2018, S. of, Honshu, Japan
- May 2, 2015, S. of, Honshu, Japan
- September 23, 2024, Izu Islands, Japan
- September 4, 1996, Honshu Island, Japan
More
Significant earthquakes of 2023The 2000sEvery quake the USGS located in 2023Recent earthquakes near hereThis day in weather history
Sources
Significant earthquakes from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-10-01. NCEI earthquake 10707. The written accounts and the magnitude estimates are from the USGS earthquake catalog, event us6000lcz1, matched to this record by time, place and magnitude.