Minor earthquake: M3.01 quake has struck near Mammoth in Wyoming

A minor earthquake magnitude 3.01 (ml/mb) has occurred on Sunday, 21 km SW of Mammoth, Wyoming (13 miles). All ids that are associated to the event: uu80118201. Unique identifier: uu80118201. Exact location, longitude -110.85566711426° West, latitude 44.822334289551° North, depth = 1.0900000333786 km. The temblor was reported at 07:38:38 / 7:38 am (local time epicenter). Global time and date of event 28/09/25 / 2025-09-28 07:38:38 / September 28, 2025 @ 7:38 am UTC/GMT. The earthquake occurred at a depth of 1.0900000333786 km (1 miles).

There are an estimated 130,000 minor earthquakes in the world each year. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days five and in the last 365 days eight earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Did you feel the quake?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 21 km SW of Mammoth, Wyoming.

Mammoth Wyoming

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Parameter	Value	Description
Magnitude	3.01 mb	The magnitude for the event.
Longitude	-110.85566711426° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	44.822334289551° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	1.0900000333786 km	Depth of the event in kilometers.
Place	21 km SW of Mammoth, Wyoming	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-28 07:38:38	Time when the event occurred. UTC/GMT
Updated	2025-09-28 07:41:54	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt		The total number of felt reports
CDI		The maximum reported intensity for the event.
MMI		The maximum estimated instrumental intensity for the event.
Alert Level		The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status	automatic	Indicates whether the event has been reviewed by a human.
Tsunami	0	This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG	139	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	uu	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,uu,	A comma-separated list of network contributors.
Number of Stations Used	28	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.1069	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.469999999 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	47	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	ml	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	uu80118201	Id of event.
Event Code	80118201	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,uu80118201,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake: M3.01 quake has struck near Mammoth in Wyoming

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