Zambales, Central Luzon • 14.83°N, 120.28°E
Real-time earthquake tracking and seismic risk for Olongapo, Zambales — recent activity, nearby fault lines and volcanoes, and emergency contacts.
Seismic risk
100/100
very high
Last 90 days
341
within 200 km
Last 24h
7
Largest
M5.0
Nearest fault
39 km
Digdig Fault
Faults <150 km
5
Volcanoes <100 km
1
Population
260,317
Seismic Risk Score: 100/100
39km from Digdig Fault
7 km NW of Cabacao, Philippines
1 months ago • 90km deep
Energy: ~477 tons of TNT
264
Shallow (<70km)
Most damaging
77
Intermediate
70-300km
0
Deep (>300km)
Less damage
Shallow earthquakes (<70km) typically cause the most damage as seismic waves travel a shorter distance to the surface. Olongapo has experienced 264 shallow earthquakes in the past 90 days.
Largest recorded events within 250 km of Olongapo (USGS catalog, since 1900).
4 km E of Macapsing, Philippines
1990 • 134 km away • 25 km deep
6 km E of Tignoan, Philippines
1937 • 153 km away • 15 km deep
18 km WSW of Tayaman, Philippines
1942 • 188 km away • 15 km deep
14 km ENE of Suklayin, Philippines
1970 • 184 km away • 31 km deep
18 km W of Harrison, Philippines
1972 • 156 km away • 26 km deep
14 km WNW of Bolitoc, Philippines
1999 • 119 km away • 33 km deep
10 km E of Sabang, Philippines
1994 • 168 km away • 32 km deep
17 km N of Karligan, Philippines
1970 • 193 km away • 15 km deep
1 km ENE of Santo Cristo, Philippines
1985 • 67 km away • 188 km deep
Southeastern Luzon, Philippines
1901 • 207 km away • 10 km deep
26 km WSW of Malamig, Philippines
1928 • 238 km away • 25 km deep
4 km N of Canaoalan, Philippines
1987 • 138 km away • 107 km deep
Marikina Valley Fault System
🔴 Active • 146km long
Max historical: M7.5
West Valley Fault
🔴 Active • 100km long
Max historical: M7.2
East Valley Fault
🔴 Active • 80km long
Max historical: M7
Lubang Fault
🔴 Active • 80km long
Max historical: M7
Regional:
Olongapo is located in the Central Luzon of the Philippines, a country that sits on the Pacific Ring of Fire—one of the most seismically active zones on Earth. The Philippines experiences an average of 20 earthquakes per day, though most are too small to be felt.
The nearest major fault to Olongapo is the Digdig Fault, located approximately 39 km away. The last major event on this fault was the 1990 Luzon Earthquake (M7.8).
With a population of 260,317, earthquake preparedness is crucial for Olongapo residents. We recommend having an emergency kit ready, knowing the safest spots in your home, and practicing DROP-COVER-HOLD ON with your family.
FAQ
Olongapo, Zambales has a very high earthquake risk (100/100 on QuakeGlobe's index), driven mainly by its proximity to the Digdig Fault (~39 km away). Our catalog logged 341 earthquakes within 200 km in the last 90 days, the strongest a M5.0.
The nearest mapped fault to Olongapo is the Digdig Fault, about 39 km away. It is considered capable of up to about M7.8. Its last major event was the 1990 Luzon Earthquake (M7.8).
The strongest earthquake catalogued near Olongapo since 1900 was a M7.7 in 1990 (4 km E of Macapsing, Philippines). Damaging earthquakes are infrequent, but the surrounding region is seismically active.
Yes — 1 active or potentially active volcano lies within 100 km of Olongapo: Pinatubo. The nearest is Pinatubo, about 34 km away.
Drop, Cover, and Hold On: get under a sturdy table, protect your head and neck, and stay put until the shaking stops. Stay away from windows and exterior walls, and if you are near the coast and feel strong or prolonged shaking, move to higher ground in case of a tsunami. See the QuakeGlobe preparedness guide for a full checklist.