3:45 PM - 4:00 PM
[SSS33-08] Construction of historical document database for damaging earthquakes in Kanto region during the early modern period and felt reports of the 1855 Ansei Edo earthquake in the areas outside Edo City
Keywords:historical earthquakes, earthquake historical documents database, 1855 Ansei Edo Earthquake
We also conducted document surveys and analyzed historical documents for the Ansei Edo earthquake, which occurred on the 2nd day of the tenth month on 2nd year of Ansei era (November 11th, 1855 on the Gregorian calendar) and caused severe damage in and around Edo City, the former Tokyo Metropolis. We collected new historical records in Chiba prefecture (Muragishi and Satake, 2015, Disaster and Reconstruction and Documentation), and re-examined previously-published historical records in Ibaraki and Kanagawa prefectures (Muragishi et al., 2016, ibid). We also carefully re-examined the felt reports in distant areas from Edo based on previously-published sourcebooks. We selected reliable historical documents describing the time of ground shaking which are consistent with the occurrence time of the Ansei Edo earthquake, and estimated the seismic intensity. On the locations where the felt reports were described, we identified current names and locations (longitudes and latitudes) using other historical documents, contemporary pictorial maps, and literature of Japanese historical studies, and constructed seismic intensity map for this earthquake.
Acknowledgment: This study was conducted as a part of the Education, Culture, Sports, Science and Technology Ministry funded research "Special Project for Reducing Vulnerability for Urban Mega Earthquake Disasters ".