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█ Latest Earthquake Information
The following information was automatically determined by the NIED Hi-net system.    See for details
Hypocenter Region E OFF FUKUSHIMA PREF
Origin Time (JST) Dec 09, 2023 21:09:31.18
Latitude 37.049N
Longitude 141.715E
Depth 44.1km
Magnitude 3.1

Hypocenter Map
█ Earthquake Information by AQUA system Mechanism Solution Catalog
An earthquake occurred in/around the "SE OFF BOSO PENINSULA" on Dec 09, 16:03 (JST).
- Dec 09, 2023 16:04:13 (JST) Announcement
- Dec 09, 2023 16:08:02 (JST) Update
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What is "AQUA" System? (in Japanese)
Max . Amplitude Distribution Maps (in Japanese)
█ Notice of Hi-net Past Notice
Dec 04, 2023:  Information about Scheduled Maintenance
Mar 20, 2023:  Software to show 3D seismic velocity structure beneath Japan renewal
Mar 01, 2023:  The guidance of the updating user account 2023.
Jul 29, 2022:  Information about maintenance at stations N.ST1H, 2H, 3H, 4H, 5H, and 6H
Jun 14, 2019:  Digital Object Identifiers (DOIs) for Datasets at NIED”Ēs seismograph networks (MOWLAS)
█ Recent Large Earthquake
   Dec 09, 2023 (JST)   SE OFF BOSO PENINSULA   M4.7
- Criteria   - Epicenter on the GSI maps   - Back number
◤Earthquake Information ↓ Clickable
Earthquake Information
Origin Time (JST) Dec 09, 2023 16:03:45.31
Latitude 34.51N
Longitude 140.25E
Depth 72km
Magnitude 4.7
◤Mechanism Solution Information
Mechanism Solution Information
Plane1 Strike/Dip 87.1˚/37.4˚
Plane2 Strike/Dip 315.7˚/63.2˚
P-Axis Azimuth/Take-off 268.6˚/28.3˚
T-Axis Azimuth/Take-off 26.3˚/76.0˚
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