Where is the South China Sea earthquake located relative to active seismic zones?

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South China Sea Earthquake Located Outside Active Seismic Zones

An earthquake recorded in the South China Sea on April 3, 2024, with a magnitude of 4.4, occurred at a depth of 611 kilometres. This depth and its geographical location mean it did not cause any surface tremors. The earthquake's epicentre was situated generally outside of active earthquake zones and the Pacific Ring of Fire.
Geographical Location and Depth

The Malaysian Meteorological Department (MetMalaysia) detected the earthquake at 3:32 AM. Its coordinates were 6.45 degrees North and 115.87 degrees East in the South China Sea. The significant depth of 611 km is a key factor in why no surface tremors were felt, as earthquakes occurring at depths greater than 300 km typically do not impact the surface.
Seismotectonic Map Analysis

Analysis based on the Department of Minerals and Geoscience (JMG) 2009 seismotectonic map, in its fifth edition, indicates that the earthquake originated in an area identified as an 'inactive thrust fault'. This classification further supports the assessment that the event occurred in a region not typically associated with significant seismic activity.
Absence of Aftershocks and Surface Impact

Following the initial event, MetMalaysia reported that no aftershocks were triggered. This observation, combined with the earthquake's considerable depth and location outside known active seismic belts, contributed to the conclusion that there was no effect on the surface. Information regarding the earthquake was recorded but not initially released to the public, though MetMalaysia continued to monitor the event.

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Where is the South China Sea earthquake located relative to active seismic zones?

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