A 2.9-magnitude earthquake struck Sri Medan in Parit Sulong, Johor on September 3, 2025 at 6:39pm. The Malaysian Meteorological Department recorded the tremor 10 kilometres below ground.
The epicentre sat 10km southwest of Yong Peng. Coordinates pinpointed the location at 1.95 degrees north and 102.99 degrees east. Nobody reported damage or strong shaking.
This earthquake became the eighth to rock Johor since seismic activity kicked off on August 24, 2025. The series began with a 4.1-magnitude earthquake at 6:13am that morning.
Six more earthquakes followed on back-to-back days. A 3.2-magnitude quake hit on August 27 at 8:59am. The next day brought a 2.5-magnitude tremor at 7:56pm.
The ground kept moving. August 29 delivered a 3.4-magnitude earthquake at 4:24am. August 30 saw a 2.7-magnitude tremor at 7:29am. August 31 produced another 2.9-magnitude earthquake.
A separate 2.8-magnitude tremor also struck Yong Peng on August 24, 2025. That quake hit 28 kilometres northwest of Kluang. MetMalaysia keeps watching the seismic situation across the region.
Mersing Fault Drives Johor’s Earthquake Activity
Scientists have pinpointed the Mersing fault as the culprit behind Johor’s recent earthquake spree. The fault has woken up from its slumber despite zero recorded earthquakes in the area before this.
The tremors happen when pieces of earth’s crust crash into each other. This creates pressure along the fault line. Eventually, the fault gives way and releases energy as seismic waves.
Malaysia sits on the stable Sunda Plate. This puts the peninsula in a low earthquake zone. The country lies outside the Pacific Ring of Fire, making earthquakes pretty rare here.
Old faults can spring back to life because of earthquakes in nearby countries. Johor’s rocks are hard and ancient. This lets seismic waves travel much further than usual.
Even rock-solid regions like the Malaysian peninsula can see dormant faults wake up again.
