M5.7 Earthquake 199 km NW of Oula Xiuma, China — July 28, 2026
2026-07-28 03:16:08 UTC (2026-07-28) · approx. 10:16 AM UTC+7 local
Felt by 1 person across nearby locations. Maximum shaking intensity MMI 7.1 (severe). Aftershock of the M5.8 mainshock.
On July 28, 2026 at 03:16 UTC, a magnitude 5.7 shallow crustal earthquake struck 199 km NW of Oula Xiuma, China, at a depth of 10.0 km and coordinates 35.4217°, 99.4752°. The earthquake was reported felt by 1 personacross nearby locations, with a maximum shaking intensity of Modified Mercalli Intensity (MMI) 7.1 (severe). The USGS PAGER system issued a yellow alert level for this event, indicating local impact possible. This earthquake was detected by 267 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 650, making it a moderate-impact event. The nearest populated place is Ziketan (population 24,758).
Physical scale: An earthquake of magnitude 5.7 releases seismic energy equivalent to roughly 5 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 5.2 km — a useful intuition for the size of the slip patch on the fault.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.8 mainshock that occurred 15 days ago 194 km NW of Oula Xiuma, China. Since the mainshock, the USGS has recorded 6 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
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 1 citizen response 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 | 1,662,039 |
| MMI 4 | light | 360,140 |
| MMI 5 | moderate | 2,594 |
| MMI 6 | strong | 263 |
| MMI 7 | very strong | 2,261 |
Earthquake Details
99.4752°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.7 earthquake near Oula Xiuma, China?
The magnitude 5.7 earthquake that struck 199 km NW of Oula Xiuma, China on July 28, 2026 at 03:16 UTC had a depth of 10.0 km. It was felt by 1 person with maximum shaking intensity of MMI 7.1 (severe). For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 35.4217°, 99.4752°, which is 199 km NW of Oula Xiuma, China. The nearest populated place is Ziketan (population 24,758).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.7 earthquakes can continue for days to weeks and gradually diminish over time.
Is this the same earthquake as the M5.8 one earlier?
No. This magnitude 5.7 earthquake is an aftershock of the larger magnitude 5.8 mainshock that occurred earlier 194 km NW of Oula Xiuma, China. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Location
Authoritative source: USGS event page (event ID: us6000tga6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 28, 2026). M5.7 Earthquake 199 km NW of Oula Xiuma, China — July 28, 2026. Retrieved August 4, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tga6/