M5.5 Earthquake 44 km WNW of Monywa, Myanmar — October 7, 2021
2021-10-07 18:28:03 UTC (2021-10-07) · approx. 12:28 AM UTC+6 local
Felt by 39 people across nearby locations.
On October 7, 2021 at 18:28 UTC, a magnitude 5.5 intermediate depth earthquake struck 44 km WNW of Monywa, Myanmar, at a depth of 110.0 km and coordinates 22.3124°, 94.7676°. The earthquake was reported felt by 39 peopleacross nearby locations, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 3.9 (light). The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. The nearest populated place is Monywa (population 182,011).
Physical scale: An earthquake of magnitude 5.5 releases seismic energy equivalent to roughly 3 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 3.8 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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 39 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 | 9,754,264 |
| MMI 4 | light | 5,652,035 |
Earthquake Details
94.7676°E
Technical Information
Common Questions
How strong was the magnitude 5.5 earthquake near Monywa, Myanmar?
The magnitude 5.5 earthquake that struck 44 km WNW of Monywa, Myanmar on October 7, 2021 at 18:28 UTC had a depth of 110.0 km. It was felt by 39 people with maximum shaking intensity of MMI 3.9 (light). For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 22.3124°, 94.7676°, which is 44 km WNW of Monywa, Myanmar. The nearest populated place is Monywa (population 182,011).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.5 earthquakes can continue for days to weeks and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000fsrg). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 7, 2021). M5.5 Earthquake 44 km WNW of Monywa, Myanmar — October 7, 2021. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000fsrg/