M6.1 Earthquake 1 km S of Lian, Philippines — May 21, 2022
2022-05-21 21:50:48 UTC (2022-05-21) · approx. 5:50 AM UTC+8 local
Felt by 53 people across nearby locations. Maximum shaking intensity MMI 4.6 (moderate).
On May 21, 2022 at 21:50 UTC, a magnitude 6.1 intermediate depth earthquake struck 1 km S of Lian, Philippines, at a depth of 129.0 km and coordinates 14.0187°, 120.6494°. The earthquake was reported felt by 53 peopleacross nearby locations, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 4.6 (moderate). The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 270 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 606, making it a moderate-impact event. The nearest populated place is Nasugbu (population 62,857).
Physical scale: An earthquake of magnitude 6.1 releases seismic energy equivalent to roughly 21 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 9.7 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Philippines, a region characterized by the Manila Trench and Philippine Trench subduction systems, where the Philippine Sea Plate overrides the Eurasian Plate. The nearest mapped fault system is the Philippine Fault. View all earthquakes in Philippines.
Learn more: Magnitude scale · Aftershock sequences
Nearest Populated Places
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 53 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 69,001 |
| MMI 4 | light | 44,443,684 |
| MMI 5 | moderate | 355,137 |
Earthquake Details
120.6494°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 6.1 earthquake near Lian, Philippines?
The magnitude 6.1 earthquake that struck 1 km S of Lian, Philippines on May 21, 2022 at 21:50 UTC had a depth of 129.0 km. It was felt by 53 people with maximum shaking intensity of MMI 4.6 (moderate). For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at 14.0187°, 120.6494°, which is 1 km S of Lian, Philippines. The nearest populated place is Nasugbu (population 62,857). View all earthquakes in Philippines.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.1 earthquakes can continue for weeks to months and gradually diminish over time.
Has Philippines had earthquakes this big before?
The largest recorded earthquake in Philippines was the M8.0 Mindanao earthquake of August 17, 1976. Today's magnitude 6.1 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000hmz8). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, May 21, 2022). M6.1 Earthquake 1 km S of Lian, Philippines — May 21, 2022. Retrieved August 2, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000hmz8/