Publication Date:
2019
Description:
〈span〉〈div〉ABSTRACT〈/div〉The 〉1000‐km‐long transform fault defining the continental western boundary of the Indian plate (Fig. 〈a href="https://pubs.geoscienceworld.org/srl#f1"〉1〈/a〉) is named after the town of Old Chaman (30.85° N, 66.52° E) that was damaged by an 6.5〈Mw〈6.7 earthquake there in 1892 (〈a href="https://pubs.geoscienceworld.org/srl#rf15"〉Griesbach, 1893〈/a〉). We quantify slip and afterslip in the 1892 earthquake from historical reports of rail offsets and rotation, and estimate rupture length from survey reports. We estimate that total slip exceeded 1 m, similar to the current potential slip deficit now prevailing on the fault derived from recent Interferometric Synthetic Aperture Radar and Global Positioning System studies. As a consequence, a recurrence of the 1892 earthquake could soon occur. In 1892, the population of Chaman numbered less than 1000. The present population of Chaman and nearby villages exceeds 0.5 million.〈/span〉
Print ISSN:
0895-0695
Electronic ISSN:
1938-2057
Topics:
Geosciences
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