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Light earthquake: M4.7 quake has struck near Tilarán in Costa Rica

Posted by admin on October 4, 2025 0 Comments

A light earthquake magnitude 4.7 (ml/mb) has struck on Saturday, 13 kilometers (8 miles) from Tilarán in Costa Rica. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 10 km (6 miles). Exact time and date of event in UTC/GMT: 04/10/25 / 2025-10-04 21:08:45 / October 4, 2025 @ 9:08 pm. The temblor was detected at 21:08:45 / 9:08 pm (local time epicenter). Id of earthquake: us6000reun. Event ids that are associated: us6000reun. Exact location of event, longitude -84.8718 West, latitude 10.543 North, depth = 10 km.

The epicenter was 93 km (58 miles) from Alajuela (c. 47 500 pop), 63 km (39 miles) from Liberia (c. 45 400 pop), 63 km (39 miles) from Puntarenas (c. 35 700 pop), 54 km (33 miles) from San José (c. 31 400 pop), 54 km (34 miles) from Quesada (c. 27 300 pop), 63 km (39 miles) from Chacarita (c. 26 400 pop), 28 km (17 miles) from Cañas (c. 20 300 pop). Country/countries that might be effected, Costa Rica (c. 4 516 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Llorente, Santiago, Colón.

There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days seven earthquakes of magnitude 3.0 or greater that has occurred nearby.

Did you feel it?

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 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: 13 km NE of Tilarán, Costa Rica.

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Parameter	Value	Description
Magnitude	4.7 mb	The magnitude for the event.
Longitude	-84.8718° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	10.543° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10 km	Depth of the event in kilometers.
Place	13 km NE of Tilarán, Costa Rica	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-10-04 21:08:45	Time when the event occurred. UTC/GMT
Updated	2025-10-04 21:45:12	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	340	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	39	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.263	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.91 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	78	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	us6000reun	Id of event.
Event Code	6000reun	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000reun,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.7 quake has struck near Tilarán in Costa Rica

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