Japanese English ( β Ver. )
█ Latest Earthquake Information
The following information was automatically determined by the NIED Hi-net system.    See for details
Hypocenter Region S OFF URAKAWA
Origin Time (JST) Aug 05, 2020 01:32:00.86
Latitude 41.781N
Longitude 142.427E
Depth 58.5km
Magnitude 2.5

Hypocenter Map
█ Earthquake Information by AQUA system Mechanism Solution Catalog
An earthquake occurred in/around the "SE OFF BOSO PENINSULA" on Aug 04, 20:21 (JST).
- Aug 04, 2020 20:22:07 (JST) Announcement
- Aug 04, 2020 20:27:17 (JST) Update
You may have to reload the web page to see the latest information.
What is "AQUA" System? (in Japanese)
Max . Amplitude Distribution Maps (in Japanese)
█ Notice of Hi-net Past Notice
Mar 02, 2020:  The guidance of the updating user account 2020.
Aug 01, 2019:  Software to show 3D seismic velocity structure beneath Japan renewal
Jun 14, 2019:  Digital Object Identifiers (DOIs) for Datasets at NIED”Ēs seismograph networks (MOWLAS)
Jan 07, 2015:  We started the continuous waveform data download service for ADEP.
Oct 01, 2014:  We started the continuous waveform data download service for JAMSTEC[DONET1].
█ Recent Large Earthquake
   Jul 29, 2020 (JST)   NEAR CHOSHI CITY   M4.8
- Criteria   - Epicenter on the GSI maps   - Back number
◤Earthquake Information ↓ Clickable
Earthquake Information
Hypocenter Region NEAR CHOSHI CITY
Origin Time (JST) Jul 29, 2020 05:33:23.72
Latitude 35.93N
Longitude 140.82E
Depth 17km
Magnitude 4.8
◤Mechanism Solution Information
Mechanism Solution Information
Plane1 Strike/Dip 340.3˚/50.5˚
Plane2 Strike/Dip 230.2˚/67.4˚
P-Axis Azimuth/Take-off 188.0˚/43.8˚
T-Axis Azimuth/Take-off 288.8˚/79.8˚
Policies  |  ▶How to use the data  |  ▶Contact us  |  ▶Web site for mobile phones (in Japanese)
We, NIED, do not deliver any e-mails of immediate seismic information obtained by the AQUA system.
In addition, please understand that we prohibit the redistribution of the seismic data. For more information, please read How to use the Hi-net data and FAQ.
High Sensitivity Seismograph Network Laboratory, Network Center for Earthquake, Tsunami and Volcano,
National Research Institute for Earth Science and Disaster Resilience.
3-1 Tennodai, Tsukuba City, Ibaraki Prefecture, 305-0006, JAPAN
Copyright © National Research Institute for Earth Science and Disaster Resilience, All rights Reserved.