Magnitude Year Mth Day Time(UTC) Lat Long mb Ms Mag Scale Mag Scale Intensity Explo Source 1915 03 31 18:30 42.90 -110.90 IV SRA 1915 05 08 16:10 44.90 -110.70 V SRA 1915 10 17 03:06 * 44.30 -110.30 II SRA 1916 08 12 04:00 * 42.40 -107.80 III SRA 1917 03 10 14:34 41.80 -107.20 IV SRA 1920 02 02 00:45 * 44.80 -109.20 III SRA