The BMKG also noted that the movement of the thrust fault caused strong shaking and carried the potential to generate a tsunami. Tsunami
Earlier, the BMKG confirmed an update to the data for the shallow tectonic earthquake, revising the magnitude to M7.7 with a depth of 15 km. The BMKG’s earthquake monitoring system responded rapidly to the event, issuing a tsunami early warning just 2 minutes and 16 seconds after the main shock. Monitoring staff subsequently updated the tsunami early warning 10 minutes later, once the earthquake parameters had stabilized and become precise.
The earthquake triggered tsunami waves that struck several coastal areas. The BMKG utilized a multi-scenario modeling system and classified threat levels into ‘Alert’ (potential wave heights of 0.5 to 3 meters) and ‘Advisory’ (heights below 0.5 meters).
The sea-level observation network (tide gauges) recorded tsunami waves arriving in Reo (Manggarai) and East Manggarai with peak heights reaching 1.61 meters; in Maurole (Ende) at 0.94 meters; and in Bulukumba and Sape (Bima), where heights exceeded 0.5 meters.
BMKG monitoring stations recorded tsunami waves arriving at ten coastal locations. These included: Sikka, with a height of 0.20 meters (at 05:03 WIB); Kewapante Port, Sikka, at 0.38 meters (at 05:16 WIB); East Flores at 0.25 meters (at 05:24 WIB); and Labuan Bajo at 0.36 meters (at 05:26 WIB).
