9:30 AM - 9:45 AM
[S05-1-05] Analog Seismogram Archives at Earthquake Research Institute, the University of Tokyo
invited
Earthquake Research Institute of the University of Tokyo has several kinds of archives of analog seismograms and mareograms. First one is Historical Seismogram Collection, which includes seismograms recorded at Tokyo (at various locations and instruments around Hongo with a total of 213,579 records from 1887 to 1986), Tsukuba (10,769 records for 1922-1962), and Wakayama (12.650 records for 1922-1968). Seismograms at particular locations and dates can be searched at the website: http://wwweic.eri.u-tokyo.ac.jp/susu/en/. The oldest record from large earthquake is from the 1891 Nobi earthquake recorded at Hongo on a circular paper. Teleseismic data includes the Hongo record on the Omori seismograph, the world's first continuous seismograph, from the 1899 Alaskan earthquake. While they are archived as microfilms by 1990's, the resolutions were poor for some records and users need to go back to the original records. Second one is collection of foreign seismograms. Old seismograms between 1899 and 1917 at Taiwanese stations can be searched at http://wwweic.eri.u-tokyo.ac.jp/record-W/taiwan_kisyo-e.html. Microfilms of Canadian Seismograph Network between 1981 and 1989 are archived. For WWSSN stations, Almost complete microfilm data (~100 stations) from 1963 to 1988 are available. The coverage can be seen at http://wwweic.eri.u-tokyo.ac.jp/wwssn/filmlist.html (only in Japanese). The last one is tsunami waveform data http://wwweic.eri.u-tokyo.ac.jp/tsunamidb/index.html (only in Japanese). Tsunami waveforms recorded on Japanese tide gauges from large earthquakes between 1911 and 1996 are scanned and archived. Guest uses can see the list (sorted dates, earthquakes or locations) of 3097 records, but registration is required to download the images.