West Valley Fault — the "Big One" (≈M7.2) source. Runs N–S through Quezon City, Marikina, Pasig, Taguig, Muntinlupa.East Valley Fault — shorter splay near Marikina/Rodriguez.Philippine Fault Zone — major arc-wide strike-slip system.Manila / Philippine Trench — offshore subduction zones.Other mapped plate boundaries (live).
Earthquakes (live)
M 2.5–4
M 4–5
M 5–6
M 6+
Size + fill = magnitude. Border colour = reporting agency:
🇵🇭 PHIVOLCS (confirmed)
USGS
EMSC
A pulsing ring marks a just-arrived live event. ⬥ markers = curated historical major quakes.
View:
Soft-soil hazard
Liquefaction / shaking-amplification zones — soft, water-saturated alluvium & reclaimed land. Shaking is amplified and the ground can lose strength (liquefy). Approximate, illustrative.