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Light earthquake: M4.6 quake has struck near Álftanes in Iceland

Earthquake location 64.0429S, -22.1979WA light earthquake magnitude 4.6 (ml/mb) has occurred on Sunday, 10 kilometers (6 miles) from Álftanes in Iceland. The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, depth 10 km, -22.1979° West, 64.0429° North. The 4.6-magnitude earthquake was detected at 00:19:16 / 12:19 am (local time epicenter). Global date and time of event UTC/GMT: 28/02/21 / 2021-02-28 00:19:16 / February 28, 2021 @ 12:19 am. Event id: us7000de8w. Ids that are associated to the earthquake: us7000de8w.

Earthquake epicenter was 18 km (11 miles) from Reykjavík (c. 118 900 pop), 16 km (10 miles) from Kópavogur (c. 31 700 pop), 13 km (8 miles) from Hafnarfjörður (c. 26 800 pop), 14 km (9 miles) from Garðabær (c. 11 400 pop), 28 km (17 miles) from Mosfellsbær (c. 8 700 pop), 32 km (20 miles) from Akranes (c. 6 600 pop), 60 km (37 miles) from Selfoss (c. 6 500 pop). Nearest cities/city/villages to epicentrum/hypocenter was Selfoss, Borgarnes, Akranes (min 5000 pop). Nearby country/countries, Iceland (c. 309 000 pop) (That might be effected).

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

How would you describe the shaking?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity 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: 10 km SW of Álftanes, Iceland.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -22.1979° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 64.0429° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 10 km SW of Álftanes, Iceland Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2021-02-28 00:19:16 Time when the event occurred. UTC/GMT
Updated 2021-02-28 00:35:28 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 2 The total number of felt reports
CDI 2.7 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 326 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 0.802 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.86 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 113 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 us7000de8w Id of event.
Event Code 7000de8w An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000de8w, A comma-separated list of event ids that are associated to an event.

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