M5.4 Earthquake 178 km NNE of Colonia, Micronesia — April 22, 2024
2024-04-22 12:22:49 UTC (2024-04-22) · approx. 9:22 PM UTC+9 local
On April 22, 2024 at 12:22 UTC, a magnitude 5.4 shallow crustal earthquake struck 178 km NNE of Colonia, Micronesia, at a depth of 10.0 km and coordinates 11.0226°, 138.6943°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 120 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 449, placing it among routine seismic activity. The nearest populated place is Rumung (population 0).
Physical scale: An earthquake of magnitude 5.4 releases seismic energy equivalent to roughly 2 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 3.2 km — a useful intuition for the size of the slip patch on the fault.
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
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 | 9,602 |
Earthquake Details
138.6943°E
Technical Information
Common Questions
How strong was the magnitude 5.4 earthquake near Colonia, Micronesia?
The magnitude 5.4 earthquake that struck 178 km NNE of Colonia, Micronesia on April 22, 2024 at 12:22 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 11.0226°, 138.6943°, which is 178 km NNE of Colonia, Micronesia. The nearest populated place is Rumung (population 0).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.4 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000mduf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, April 22, 2024). M5.4 Earthquake 178 km NNE of Colonia, Micronesia — April 22, 2024. Retrieved July 2, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000mduf/