防災科研Hi-netで観測された人工地震による構造探査 (in Japanese)

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 2025
- 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

✏ 2004/8/12 掲載

   2004年8月10日より宮城県沖および岩手県沖の海域において，人工地震（エアガン・爆薬）による地殻構造調査が行われています。これは，文部科学省が平成14年度から実施している「宮城県沖におけるパイロット的重点調査観測」の一環として，国立大学法人東京大学地震研究所及び独立行政法人海洋研究開発機構が実施しているものです。

   この地殻構造調査が実施されている周辺に設置されている防災科研Hi-net観測点では，人工地震（エアガン）の振動波形が捉えられています（図1）。
この振動波形は複数の観測点で観測されているため， Hi-netシステムでは通常の地震として自動的に検知し，自動的に震源決定が行なわれています（図2）。一般的には，人工地震による振動の大きさは非常に微弱であり，他の雑振動との区別がつきにくいため，自動的に推定される震源位置は大きくばらつきます。

   構造探査の詳細につきましては，東京大学地震研究所の報道発表をご覧ください。

▼図1

▲このページの先頭へ

▼図2

▲このページの先頭へ

▶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, Center for Earthquake, Tsunami and Volcano Observation Research,
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.