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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.4 mag was detected near Santa Cruz da Graciosa in Portugal

Posted by admin on February 28, 2025 0 Comments

Earthquake location 39.0495S, -28.5364WA light earthquake magnitude 4.4 (ml/mb) has occurred on Friday, 46 kilometers (29 miles) from Santa Cruz da Graciosa in Portugal. All ids that are associated to the event: us6000pw3g. Unique identifier: us6000pw3g. Exact time and date of event in UTC/GMT: 21/02/25 / 2025-02-21 04:51:37 / February 21, 2025 @ 4:51 am. The 4.4-magnitude earthquake was detected at 04:51:37 / 4:51 am (local time epicenter). 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, -28.5364° West, 39.0495° North. The earthquake was roughly at a depth of 10 km (6 miles).

Nearest cities/city/towns to hypocenter/epicentrum was Ribeira Grande, Horta, Madalena (min 5000 pop). Earthquake epicenter was 48 km (30 miles) from Lagoa (c. 9 200 pop), 58 km (36 miles) from Horta (c. 6 600 pop), 57 km (35 miles) from Madalena (c. 6 100 pop), 61 km (38 miles) from Ribeira Grande (c. 5 200 pop). Country/countries that might be effected, Portugal (c. 10 676 000 pop).

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 one 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.

How would you describe the shaking?

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: 46 km W of Santa Cruz da Graciosa, Portugal.

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More information

Parameter Value Description
Magnitude 4.4 mb The magnitude for the event.
Longitude -28.5364° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 39.0495° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 46 km W of Santa Cruz da Graciosa, Portugal Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-02-21 04:51:37 Time when the event occurred. UTC/GMT
Updated 2025-02-28 23:24:38 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 298 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 36 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.692 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.72 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 103 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 us6000pw3g Id of event.
Event Code 6000pw3g An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000pw3g, A comma-separated list of event ids that are associated to an event.

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