𝗣𝗛𝗜𝗩𝗢𝗟𝗖𝗦 𝗧𝗢 𝗖𝗘𝗕𝗨𝗔𝗡𝗢𝗦: 𝗡𝗢 𝗘𝗔𝗥𝗧𝗛𝗤𝗨𝗔𝗞𝗘 𝗦𝗪𝗔𝗥𝗠 𝗗𝗘𝗧𝗘𝗖𝗧𝗘𝗗 𝗗𝗘𝗦𝗣𝗜𝗧𝗘 𝗥𝗘𝗖𝗘𝗡𝗧 𝗧𝗥𝗘𝗠𝗢𝗥𝗦
LOOK: The Department of Science and Technology–Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) has clarified that no earthquake swarm has been detected on Cebu Island, despite several minor earthquakes recently recorded in parts of the province, including Lapu-Lapu City.
Engr. Robinson Jorgio, director of the Visayas Cluster Monitoring Center for Earthquake and Tsunami of DOST-PHIVOLCS, explained that an earthquake swarm refers to a series of numerous earthquakes occurring within a localized area over a relatively short period without a single dominant mainshock. Such activity may continue for days, weeks, or even months before eventually subsiding.
Jorgio said that even before the recent earthquake that affected Mindanao on Monday, June 8, caused by movement along the Cotabato Trench, PHIVOLCS had already been observing minor seismic activity in the area since January.
He added that a similar pattern was observed in northern Cebu beginning in April 2025, when a series of minor earthquakes preceded the magnitude 6.9 earthquake that struck on September 30 of the same year.
PHIVOLCS-Cebu is also continuing to monitor aftershocks associated with the Bogo Bay Fault through temporary seismic monitoring stations deployed across northern Cebu. According to Jorgio, the agency is maximizing its available instruments to closely track seismic activity in the area.
While several minor earthquakes have been recorded in Lapu-Lapu City in recent months, Jorgio emphasized that these events have not been persistent and do not indicate the presence of an earthquake swarm.
He also encouraged the public to consult hazard maps to better understand the risks in their communities and to help guide disaster preparedness efforts.
Meanwhile, PHIVOLCS continues to train local government units (LGUs) in the use of the Rapid Earthquake Damage Assessment System (REDAS), a tool designed to estimate the potential impacts of earthquakes in specific areas.
Jorgio said the agency remains in close coordination with LGUs to strengthen disaster preparedness, risk assessment, and response planning initiatives.
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