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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 12 km ESE of Hafnarfjörður, Iceland

Earthquake location 64.0363S, -21.6833WA light earthquake magnitude 4.2 (ml/mb) has struck on Sunday, 12 kilometers (7 miles) from Hafnarfjörður in Iceland. The epicenter was at a depth of 10 km (6 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: us7000dfj9. Unique identifier: us7000dfj9. Global date and time of event UTC/GMT: 28/02/21 / 2021-02-28 11:32:29 / February 28, 2021 @ 11:32 am. Exact location of earthquake, -21.6833° West, 64.0363° North, depth 10 km. The temblor was picked up at 11:32:29 / 11:32 am (local time epicenter).

Nearest cities/city/villages to epicentrum/hypocenter was Borgarnes, Akranes, Selfoss (min 5000 pop). Earthquake epicenter was 15 km (9 miles) from Reykjavík (c. 118 900 pop), 14 km (9 miles) from Kópavogur (c. 31 700 pop), 13 km (8 miles) from Hafnarfjörður (c. 26 800 pop), 13 km (8 miles) from Garðabær (c. 11 400 pop), 15 km (9 miles) from Mosfellsbær (c. 8 700 pop), 37 km (23 miles) from Akranes (c. 6 600 pop). Nearby country/countries, Iceland (c. 309 000 pop) (That might be effected).

Every year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been fifteen, in the last 10 days twenty-seven, in the past 30 days twenty-seven and in the last 365 days thirty-four 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.

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 12 km ESE of Hafnarfjörður, Iceland.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -21.6833° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 64.0363° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 12 km ESE of Hafnarfjörður, 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 11:32:29 Time when the event occurred. UTC/GMT
Updated 2021-03-12 06:10:34 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 271 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 0.73 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.88 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 141 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 us7000dfj9 Id of event.
Event Code 7000dfj9 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000dfj9, A comma-separated list of event ids that are associated to an event.

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