Indonesia earthquake aftershocks could last years, Malaysia's MetMalaysia warns

Aftershocks from a significant earthquake in Indonesia could continue for an extended period, potentially lasting for days, weeks, or even years, according to Malaysia's Meteorological Department (MetMalaysia).

Dr. Mohd Hisham Mohd Anip, Director-General of MetMalaysia, explained that strong earthquakes are typically followed by a series of aftershocks in the same fault zone until seismic activity stabilizes. These aftershocks are expected to be of lower magnitude than the main quake. He cited the example of a 7.9 magnitude earthquake in southern Mindanao, Philippines, on June 8, 2026, which continues to produce aftershocks to this day.

Gecrans from major earthquakes in Sumatra, the Philippines, and Sulawesi can often be felt in various parts of Malaysia, particularly on the west coast of Peninsular Malaysia and eastern Sabah. The intensity of these tremors in Malaysia is influenced by several factors, including the earthquake's magnitude, its distance and depth, and the soil conditions in the affected areas. Shallower earthquakes, less than 100 kilometers deep, generally produce stronger tremors than deeper ones. Soft soil can also amplify seismic waves.

MetMalaysia has a history of recording tremors in eastern Sabah due to earthquakes in Sulawesi, Indonesia, and the Philippines. However, Dr. Mohd Hisham stressed that earthquakes cannot be predicted in terms of their exact location, strength, or timing. The department maintains its National Early Warning System for Earthquakes and Tsunamis (SAATNM) on high alert, operating 24/7 to monitor seismic activity and potential tsunami threats to the country. The public is advised to remain calm and obtain information only from official MetMalaysia channels.