M 4.8 Light Earthquake Strikes Near Tonopah, Nevada
Areazine synthesizes this USGS earthquake report directly from USGS's official public data feed. See our methodology for full source attribution and refresh cadence.
A magnitude 4.8 light earthquake occurred 78 km northeast of Tonopah, Nevada, on March 21, 2026. The shallow event was recorded at a depth of 2.7 km.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 6, 2026 and geographically references Nevada. Its severity classification of "medium" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Nevada.
What Happened
A light earthquake with a magnitude of 4.79 ml was recorded on March 21, 2026, at 05:57 UTC (March 20, 10:57 PM local time). The seismic event was centered 78 km northeast of Tonopah, Nevada, and occurred at a very shallow depth of 2.7 km.
Location Details
The epicenter was located at coordinates 38.4791°N and 116.4982°W. The recorded depth of 2.7 km is considered shallow; earthquakes occurring at depths of less than 20 km are typically felt more intensely by those in the immediate vicinity compared to deeper seismic events.
Impact Assessment
The USGS has assigned a "green" alert level to this event, indicating a low likelihood of casualties or significant economic damage. As this was an inland earthquake, there is no tsunami advisory, watch, or warning in effect. At the time of this report, one felt report had been submitted to the USGS, and the Maximum Modified Mercalli Intensity (MMI) was measured at 4.181, indicating light shaking.
What You Should Know
Earthquakes with magnitudes between 4.0 and 4.9 are classified as "light." These events often cause noticeable shaking and may result in light damage, though they rarely cause significant structural failure. Residents in the area should remain aware of the potential for aftershocks. In the event of further seismic activity, remember to drop, cover, and hold on.
Source
Information and data for this report were provided by the USGS Earthquake Hazards Program.
Original source: USGS Official Notice ↗
Related Earthquakes
All Earthquakes →Frequently Asked Questions
Common questions about this USGS earthquake report.