The 1907 Sumatra earthquake occurred on 4 January at 05:19:12 UTC. The re-estimated moment magnitude (Mw) is 8.2 to 8.4, with an epicentre close to Simeulue, off Sumatra. An earlier study re-estimated a surface-wave magnitude (Ms) of 7.5 to 8.0. It triggered a widespread and damaging Indian Ocean wide tsunami that caused at least 2,188 deaths on Sumatra. The low observed intensity compared to the size of the tsunami has led to its interpretation as a tsunami earthquake. Higher levels of shaking observed on Nias are attributed to a large aftershock, less than an hour later. The tsunami gave rise to the S'mong legend, which is credited with saving many lives during the 2004 earthquake. Magnitude 8.2 (mw), 25 km deep, The 1907 Sumatra Earthquake and Tsunami — 2.68°N, 95.53°E. January 4, 1907 at 05:19 UTC. Wiki link https://earthquake.usgs.gov/earthquakes/eventpage/iscgem16957943 Data: US Geological Survey (public domain).