BRIN Reveals Many Large Faults Active Above M 6.5 Flank Sumedang

Residents observed houses damaged by the earthquake in Cipameungpeuk, Sumedang Regency, West Java, Wednesday (3/1/2024). BETWEEN PHOTOS/Raisan Al Farisi/nym

JAKARTA - The National Research and Innovation Agency (BRIN) revealed that there are many large active faults with strengths above the magnitude (M) 6.5 flanking Sumedang Regency, West Java Province (Jabar). "Sumedang is among the massive active faults that we have learned well," said BRIN Earthquake Researcher Mudrik Rahmawan Daryono in a webinar entitled 'Sumedang Earthquake Complete' monitored in Jakarta, Thursday 11 January, confiscated by Antara. "This is something we must be aware of", he continued.Mudrik said the large active faults are located in very important cities, such as Cirebon, Bandung, Karawang, Indramayu, and so on. According to him, these vital cities store energy in the form of swarm earthquake and foreshocks.Mudirik said the large faults that flank Sumed Sumedang are the Baribis Segment Tampomas Segments on the north side, Sesar Baribis Segmen Ciremai on the east side, Lembang Sesar on the west side, Cileunyi Tanjungsari Fault Tanjungsari Fault and Garsela Sesar on the south side.

The continuous Baribis fault from Surabaya to the surroundings of Jakarta has a strength of up to 7 magnitudes, the Lembang Fault 7.0 magnitudes, the Tampomas Fault with a magnitude of 6.7 magnitudes, the Ciremai Sesar 1 by 6.6 magnitudes, and the Ciremai 2 Sesar with a magnitude of up to 6.9 magnitudes. According to Mudrik, the existence of these large faults must be studied more deeply in order to adapt and mitigate the potential for earthquakes in the future. In 1847, in the Tampomas segment there was an earthquake. BRIN has conducted a detailed morphological survey using drones to determine the impact of the ground earthquake. The drone data shows there is a distinctive tear from the active fault that causes a shift of about four meters. The four-meter shift could cause an earthquake measuring 7.0 magnitudes. "So on the other side there is a strong indication that an earthquake had occurred magnitude 7," said Mudrik. Furthermore, he said that the community must prepare with the worst possibility by mitigating the earthquake threat in the future.