[S05-P] Poster

[S05-P-01] Database of digitized data of analog seismic and tsunami records for historical earthquakes in Japan

^○Satoko Murotani¹, Kenji Satake², Hiroshi Tsuruoka², Hiroe Miyake², Toshiaki Sato³, Tetsuo Hashimoto⁴, Hiroo Kanamori⁵, Masahiro Osako¹ (1.National Museum of Nature and Science, Tsukuba, Japan, 2.Earthquake Research Institute, the University of Tokyo, Tokyo, Japan, 3.Ohsaki Research Institute, Inc., Tokyo, Japan, 4.Japan Meteorological Agency, Tokyo, Japan, 5.California Institute of Technology, California, United States)

Seismic and tsunami instrumental observations by seismographs and tide gauges in Japan started in 1875, and a huge number of analog records of earthquakes and tsunamis are stored at various universities and institutes in Japan. Re-analysis of historical records based on modern waveform analysis methods, high-performance computers and current knowledge on the velocity structure would produce new results and interpretations of the mechanisms of earthquakes and tsunamis that can improve hazard mitigation practice. However, it requires extensive time and skills to digitize the analog waveforms recorded on paper. We are currently constructing the database of digitized historical records for major earthquakes in Japan, for example, the 1923 Kanto, 1944 Tonankai, and 1946 Nankai earthquakes, with the cooperation of many institutes such as universities, government agencies, and companies. In this presentation, we introduce the prototype of the database. The data can be searched by event name, station name, and seismograph name. Users can obtain the instrumental constants if they are available, in addition to the digital data. We target to open this database in a few years via National Museum of Nature and Science and Earthquake Research Institute of the University of Tokyo. Contribution of digitized waveforms are welcome from any seismologists in the world. The database on the museum website will play an important role for outreach of seismology.