Tag: fault mapping
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Cebu Earthquake: Fault Finders, Knowledge Sharers, Enhanced Resilience
Cebu Earthquake: Tracing Surface Rupture and What It Means The magnitude 6.9 Cebu earthquake on September 30, 2025, left more than ground shaking—it exposed a surface rupture zone in northern Cebu. With a shallow focus of about 5 kilometers, geologists from the Philippine Institute of Volcanology and Seismology (Phivolcs) identified a new fault, later named…
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Cebu Earthquake: Fault Finders, Knowledge Sharers, and Enhanced Resilience
Understanding Cebu’s Surface Rupture and the New Bogo Bay Fault When the September 30, 2025, magnitude 6.9 earthquake rattled Cebu, it didn’t just shake the ground; it revealed a surface rupture that geologists had anticipated but not fully mapped before. The initial rupture occurred near Nailon in Bogo City, exposing a new offshore-onland fault system…