1.8
Earthquake Details: 7 km WSW of Marked Tree, Arkansas, United States
Jul 18, 2026, 08:38:15
- Depth
- 4.96 km
- Felt reports
- No data
Source: USGSUpdated: Aug 21, 2026, 05:37 PM UTC
A magnitude 1.8 earthquake occurred on Jul 18, 2026 at 08:38:15. Epicenter: 7 km WSW of Marked Tree, Arkansas, United States. Reported depth: 4.96 km.
Status: Reviewed
Tsunami information
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Time & depth
- Local time
- Jul 18, 2026, 03:38:15 CDT
- UTC
- Jul 18, 2026, 08:38:15 UTC
4.96 km · Shallow-focus
Less than 70 km deep. Shaking is often stronger near the epicentre.
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Nearby major cities
Agency measurements
Agencies may use different observations and magnitude scales, and initial estimates can change.
- USGSmd 1.81
nm60625351
- Depth:
- 4.96 km
- Status:
- Reviewed
- Time:
- Updated:
- Aug 21, 2026, 05:37 PM UTC
Technical Details
Depth4.96 km
Significance50
Latitude35.5005
Longitude-90.4940
Event IDnm60625351
Magnitude1.8
Updated:Aug 21, 2026, 17:37:58 UTC
Regional Seismicity
External Resources
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Earthquake information is automatically aggregated from the official seismic agencies listed below. Preliminary measurements can change as agencies review an event; use local emergency authorities for safety decisions. Latest successful data update: Aug 21, 2026, 17:37 UTC.
Data sources:
- USGS — Credit: U.S. Geological Survey.
- EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0.
- JMA — Source: Japan Meteorological Agency (JMA).
- Geoscience Australia — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies.
- GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.
- CENC / Wolfx — CENC earthquake parameters via Wolfx, an independent unofficial relay.
- GFZ / GEOFON — Locations, depths and magnitudes: GFZ/GEOFON using GEVN network data (CC BY 4.0).