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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Sardinal in Costa Rica

Earthquake location 10.5505S, -86.003WA light earthquake magnitude 4 (ml/mb) strikes 39 kilometers (24 miles) from Sardinal in Costa Rica on Wednesday. The temblor was detected at 23:40:12 / 11:40 pm (local time epicenter). The earthquake occurred at a depth of 30.71 km (19 miles) below the earth’s surface. Event id: us10009978. Ids that are associated to the earthquake: us10009978. Exact location of earthquake, -86.003° West, 10.5505° North, depth 30.71 km. Global date and time of event UTC/GMT: 06/07/17 / 2017-07-06 05:40:12 / July 6, 2017 @ 5:40 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearby country/countries that might be effected, Costa Rica (c. 4 516 000 pop), Nicaragua (c. 5 996 000 pop). The epicenter was 62 km (39 miles) from Liberia (c. 45 400 pop), 75 km (47 miles) from Nicoya (c. 15 300 pop), 56 km (35 miles) from Santa Cruz (c. 12 300 pop), 79 km (49 miles) from San Juan del Sur (c. 7 800 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was San Juan del Sur, Nicoya, Liberia.

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

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 39 km W of Sardinal, Costa Rica.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -86.003° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 10.5505° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 30.71 km Depth of the event in kilometers.
Place 39km W of Sardinal, 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 2017-07-06 05:40:12 Time when the event occurred. UTC/GMT
Updated 2017-08-03 11:46:15 Time when the event was most recently updated. UTC/GMT
Timezone offset -360 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 246 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 0.432 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.93 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 168 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 us10009978 Id of event.
Event Code 10009978 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10009978, A comma-separated list of event ids that are associated to an event.

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