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Light earthquake: M4.1 quake has struck near San Isidro in Costa Rica

Posted by admin on April 28, 2018 0 Comments

A light earthquake magnitude 4.1 (ml/mb) has occurred on Friday, 15 kilometers (9 miles) from San Isidro in Costa Rica. The epicenter of the earthquake was roughly 29.31 km (18 miles) below the earth’s surface. The 4.1-magnitude earthquake has occurred at 09:33:42 / 9:33 am (local time epicenter). Exact location, longitude -83.8063° West, latitude 9.4718° North, depth = 29.31 km. All ids that are associated to the event: us1000dtz7. Unique identifier: us1000dtz7. Date and time of earthquake in UTC/GMT: 27/04/18 / 2018-04-27 15:33:42 / April 27, 2018 @ 3:33 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Epicenter of the event was 60 km (37 miles) from San José (c. 335 000 pop), 68 km (42 miles) from San Francisco (c. 55 900 pop), 75 km (47 miles) from Alajuela (c. 47 500 pop), 41 km (26 miles) from Paraíso (c. 39 700 pop), 16 km (10 miles) from San Isidro (c. 34 900 pop), 55 km (34 miles) from Curridabat (c. 34 600 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was San Juan, Atenas, Guácimo. Nearby country/countries that might be effected, Costa Rica (c. 4 516 000 pop).

Each year there are an estimated 13,000 light earthquakes in the world. 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 three, in the past 30 days five and in the last 365 days twenty-eight earthquakes of magnitude 3.0 or greater that has struck near.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 15 km NW of San Isidro, Costa Rica. This information comes from the USGS Earthquake Notification Service.

More information

Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	-83.8063° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	9.4718° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	29.31 km	Depth of the event in kilometers.
Place	15km NW of San Isidro, 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	2018-04-27 15:33:42	Time when the event occurred. UTC/GMT
Updated	2018-04-28 13:05:52	Time when the event was most recently updated. UTC/GMT
Timezone offset	-360	Timezone offset from UTC in minutes at the event epicenter.
Felt	8	The total number of felt reports
CDI	3.8	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	262	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		The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.155	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.82 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	149	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	us1000dtz7	Id of event.
Event Code	1000dtz7	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us1000dtz7,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.1 quake has struck near San Isidro in Costa Rica

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