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23 July 1905 2:46 UT Mw8.3 Bolnay earthquake in northwestern Mongolia, near Russian border. Preceded 14 days by a Mw8.0. First news came from seismometers. In 1931 and 1957 more EQs. earthquake.usgs.gov/earthquakes/... doi.org/10.1111/j.13... doi.org/10…