Light earthquake 4.1 mag, 105 km NNW of Piti Village, Guam

A light earthquake magnitude 4.1 (ml/mb) has occurred on Saturday, 105 km NNW of Piti Village, Guam (65 miles). Date and time of earthquake in UTC/GMT: 02/08/25 / 2025-08-02 08:28:06 / August 2, 2025 @ 8:28 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 144.2649 East, latitude 14.3209 North, depth = 10 km. The earthquake was roughly at a depth of 10 km (6 miles). The temblor was reported at 08:28:06 / 8:28 am (local time epicenter). Id of earthquake: us7000qqt4. Event ids that are associated: us7000qqt4.

There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been two, in the last 10 days four, in the past 30 days five and in the last 365 days thirty-two earthquakes of magnitude 3.0 or greater that have been detected in the same area. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

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Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 105 km NNW of Piti Village, Guam.

Guam Piti Village

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Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	144.2649° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	14.3209° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	105 km NNW of Piti Village, Guam	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-08-02 08:28:06	Time when the event occurred. UTC/GMT
Updated	2025-08-28 07:40:20	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	reviewed	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	259	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	us	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,us,	A comma-separated list of network contributors.
Number of Stations Used	15	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.934	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.32 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	121	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mb	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us7000qqt4	Id of event.
Event Code	7000qqt4	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qqt4,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.1 mag, 105 km NNW of Piti Village, Guam

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