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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.5 mag, 34 km WNW of Ribeira Grande, Portugal


Earthquake location 38.6663S, -29.0455WA light earthquake with magnitude 4.5 (ml/mb) was detected on Wednesday, 34 kilometers (21 miles) from Ribeira Grande in Portugal. The earthquake occurred 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). The 4.5-magnitude earthquake was detected at 02:42:06 / 2:42 am (local time epicenter). Event id: us10002mu4. Ids that are associated to the earthquake: us10002mu4. Exact location, longitude -29.0455° West, latitude 38.6663° North, depth = 10 km. Exact time and date of event in UTC/GMT: 17/06/15 / 2015-06-17 02:42:06 / June 17, 2015 @ 2:42 am.

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Madalena, Horta, Ribeira Grande. Epicenter of the earthquake was 39 km (24 miles) from Horta (c. 6 600 pop), 47 km (29 miles) from Madalena (c. 6 100 pop), 34 km (21 miles) from Ribeira Grande (c. 5 200 pop). Close country/countries that might be effected, Portugal (c. 10 676 000 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 two, in the past 30 days two and in the last 365 days five earthquakes of magnitude 3.0 or greater that was reported nearby.

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: 34 km WNW of Ribeira Grande, Portugal.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude -29.0455° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 38.6663° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 34km WNW of Ribeira Grande, Portugal Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-06-17 02:42:06 Time when the event occurred. UTC/GMT
Updated 2015-07-02 00:59:53 Time when the event was most recently updated. UTC/GMT
Timezone offset 0 Timezone offset from UTC in minutes at the event epicenter.
Felt 0 The total number of felt reports
CDI 1 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 312 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 0.627 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.31 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 us10002mu4 Id of event.
Event Code 10002mu4 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10002mu4, A comma-separated list of event ids that are associated to an event.

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