Japan University Seismic Network Earthquake Catalog of First-Motion Focal Mechanisms (JUNEC FM²)

This catalog includes focal mechanism solutions for 14,544 earthquakes that occurred in and around the Japanese Islands from July 1985 to December 1998 by using first -motion polarities reported by the Japan University Seismic Network. Please use JUNEC FM² after reading and approving below.

1. Please refer the below paper when you use JUNEC FM² in your papers or researches. Ishibe, T., Tsuruoka, H., Satake, K., and Nakatani, M., A Focal Mechanism Solution Catalog of Earthquakes (M >= 2.0) in and around the Japanese Islands for 1985-1998, Bull. Seism. Soc. Am., 104(2), 1031-1036.
2. It is prohibited to use for a commercial use.
3. Publishers do not take any responsibilities for issues arising from the use of JUNEC FM².
4. Contact to the publishers for any questions and/or inquiries.

Acknowledgments

We thank to Hokkaido University, Hirosaki University, Tohoku University, the Earthquake Research Institute of the University of Tokyo, Nagoya University, the Disaster Prevention Research Institute of the Kyoto University, Kochi University, Kyushu University, and Kagoshima University for their continual effort to accumulate and preserve pick file data. We used a program modified from HASH (Hardebeck and Shearer, 2002) to estimate the focal mechanism solutions (http://earthquake.usgs.gov/research/software/, last accessed June, 2012).

Publishers Information

1-1-1, Yayoi, Bunkyo, Tokyo, 113-0032, Japan

Earthquake and Volcano Information Center, the University of Tokyo

e-mail: junec @ eri.u-tokyo.ac.jp

Data Source

We use ftp://ftp.eri.u-tokyo.ac.jp/pub/data/junec/mech/