Focal Mechanism Catalog

Summary / Results
- Summary / Results
- Top Page
- What is Hi-net?
- How to use the data
- Basic knowledge for earthquake and seismology (in Japanese)
- Topics (in Japanese)
- Topics of slow event (in Japanese)
- Researches (in Japanese)
- SHINGEN-Kun (in Japanese)
- SHINGEN-Chan (in Japanese)
- 3-D Hypocenter Distribution using VRML Technology
- 3-D Hypocenter Distribution
- News Archive (in Japanese)
- Links
- Sitemap
- Policies
NIED Hi-net
High Sensitivity Seismograph Network Japan
Hypocenter / Waveform
- Hypocenter / Waveform
- AQUA System
- What is "AQUA" System?
  (in Japanese)
- Catalog of Focal Mechanism
- Hi-net Hypocenter Maps
- Max. Amplitude Distribution Maps
  (in Japanese)
- Backnumber of Recent Large Earthquake
  (in Japanese)
- Continuous Waveform Images
- 100-trace Continuous Waveform Images
- Earthquake Info rmation at the Kanto-Tokai district, Japan
- Teleseismic Waveform
NIED Hi-net
High Sensitivity Seismograph Network Japan
Station Information
- Station Information
- Searching Station (in Japanese)
- Station Dataset (in Japanese)
- New Station(s) (in Japanese)
- Updated Station(s) (in Japanese)
- Operating Information (in Japanese)
NIED Hi-net
High Sensitivity Seismograph Network Japan
FAQ / Registration
- FAQ / Registration
- FAQ
- Contact Us
- User Registration
- Change your E-mail address or Password
- Update Your User Account 2023
- Question About the User Registration
NIED Hi-net
High Sensitivity Seismograph Network Japan
For Registered Users
- Login / For Registered Users
- Log-in / Log-out
- Continuous waveform data download
- Download site for longer-time data or data before March 2004
- Event waveform data download
- Preliminary Catalog by the Hi-net Automatic System
- JMA Unified Hypocenter Catalogs
- Epicentral distribution of deep low-frequency tremor in southwest Japan
- Catalog Download
- Azimuth information of the Hi-net borehole sensors (in Japanese)
- Borehole Sensors Maintenance History
- Response of Observation Equipments
- Hi-net WIN Channels Table
- Reporting the Research Result
- Manual / Tools
NIED Hi-net
High Sensitivity Seismograph Network Japan

Focal Mechanism Catalog
Focal mechanisms automatically determined by the AQUA system.
Focal mechanisms are available for the period from August, 2004 to March, 2023.

Definition of Terms (Japanese only)					Year: Month:
Mar, 2023 * Map is displayed when you put a mouse cursor on a list.
Origin time (JST) *	Region *	Latitude *	Longitude *	Depth *	Mw	Strike	Dip	Rake	Varred	Number of station(s)	Type
2023-03-21 06:28:40	HIDAKA MOUNTAINS REGION	42.4N	143.1E	71km	4.0	151.5˚/51.9˚	47.9˚/79.6˚	14.1˚/137.0˚	84.5	5	M
2023-03-21 03:52:56	NEAR MATSUSHIRO	36.4N	138.0E	8km	3.2	286.0˚/29.4˚	56.2˚/70.9˚	156.8˚/36.1˚	86.8	4	M
2023-03-20 10:59:24	NEAR CHOSHI CITY	35.5N	141.1E	44km	4.7	106.1˚/315.1˚	50.3˚/43.5˚	70.5˚/111.9˚	79.2	7	C
2023-03-18 20:08:08	SW IBARAKI PREF	36.3N	140.0E	65km	3.7	178.2˚/358.7˚	23.8˚/66.2˚	89.5˚/90.2˚	60.4	5	M
2023-03-14 13:36:47	SE OFF MIYAGI PREF	37.9N	141.8E	55km	3.8	185.3˚/52.3˚	63.3˚/36.4˚	64.3˚/130.8˚	85.0	3	C
2023-03-14 05:35:37	NORTHERN IWATE PREF	39.8N	141.7E	75km	4.0	190.7˚/67.7˚	71.9˚/31.0˚	64.4˚/142.9˚	97.5	3	C
2023-03-14 04:29:52	NORTHERN IBARAKI PREF	36.8N	140.5E	6km	3.8	224.1˚/20.1˚	61.8˚/30.4˚	-78.1˚/-111.0˚	86.5	7	C
2023-03-13 05:25:36	E OFF IWATE PREF	39.6N	142.2E	86km	3.8	192.1˚/285.2˚	89.7˚/5.6˚	-84.4˚/-176.9˚	78.9	3	C
2023-03-12 22:43:50	NORTHERN IBARAKI PREF	36.8N	140.6E	5km	3.2	200.0˚/354.8˚	63.9˚/28.4˚	-78.3˚/-112.5˚	67.2	3	C
2023-03-12 10:06:08	NEMURO REGION	43.5N	144.8E	135km	3.6	148.2˚/275.2˚	10.1˚/83.9˚	-37.4˚/-98.1˚	77.9	3	C
2023-03-11 18:18:38	SOUTHERN MIYAGI PREF	38.0N	140.5E	95km	3.7	151.8˚/353.2˚	45.4˚/46.6˚	74.6˚/105.1˚	63.4	4	M
2023-03-11 05:13:44	CENTRAL CHIBA PREF	35.7N	140.0E	59km	4.3	124.3˚/218.8˚	28.7˚/87.6˚	-5.1˚/-118.6˚	95.2	3	M
2023-03-11 05:12:43	HIDAKA MOUNTAINS REGION	42.2N	143.0E	54km	4.7	200.6˚/28.9˚	23.2˚/67.0˚	82.4˚/93.2˚	81.9	10	C
2023-03-07 21:13:29	NE AICHI PREF	35.0N	137.7E	30km	3.2	125.0˚/32.7˚	74.7˚/81.6˚	8.7˚/164.5˚	63.8	4	C
2023-03-07 07:24:51	SE OFF TOKACHI	42.3N	144.7E	26km	4.8	64.3˚/222.7˚	67.6˚/23.9˚	98.6˚/70.1˚	84.3	8	C
2023-03-07 06:07:29	S OFF TOMAKOMAI	42.4N	141.8E	104km	3.7	7.1˚/261.4˚	37.0˚/78.5˚	-160.6˚/-54.6˚	56.9	5	C
2023-03-03 11:10:25	E OFF FUKUSHIMA PREF	37.7N	141.7E	50km	3.7	174.3˚/28.1˚	80.5˚/11.4˚	83.7˚/123.3˚	78.2	3	C
2023-03-02 02:21:34	E OFF IBARAKI PREF	36.0N	140.8E	78km	3.7	192.0˚/347.7˚	61.1˚/31.2˚	-77.7˚/-111.1˚	73.0	3	C
2023-03-01 00:48:08	NEAR CHOSHI CITY	35.7N	140.7E	52km	4.5	183.0˚/1.2˚	21.8˚/68.2˚	91.7˚/89.3˚	92.0	6	C
* It is a position and the time of centroid when classification is C. class C = AQUA-CMT class M = AQUA-MT

▶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.