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Earthquake breaking news, Moderate World Earthquakes Magnitude 5–5.9

Moderate earthquake: M5.4 quake has struck near Vailoatai in American Samoa



Earthquake location -15.4752S, -171.5654WA moderate earthquake magnitude 5.4 (ml/mb) has occurred on Monday, 149 km SW of Vailoatai, American Samoa (93 miles). Exact time and date of earthquake 21/08/17 / 2017-08-21 21:12:23 / August 21, 2017 @ 9:12 pm UTC/GMT. Event ids that are associated to the earthquake: us2000aaei, pt17233050. Id of event: us2000aaei. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 10:12:23 / 10:12 am (local time epicenter). Exact location, longitude -171.5654° West, latitude -15.4752° South, depth = 10 km. The earthquake was roughly at a depth of 10 km (6 miles).

There are an estimated 1320 moderate quakes in the world each year. Earthquakes 5.0 to 6.0 may cause light damage to buildings and other structures. 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 three earthquakes of magnitude 3.0 or greater that was reported nearby.

Questions or comments?

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: 149 km SW of Vailoatai, American Samoa.

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More information

Parameter Value Description
Magnitude 5.4 mb The magnitude for the event.
Longitude -171.5654° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.4752° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 149km SW of Vailoatai, American Samoa Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-08-21 21:12:23 Time when the event occurred. UTC/GMT
Updated 2017-08-21 21:39:56 Time when the event was most recently updated. UTC/GMT
Timezone offset -660 Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 3.4 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 449 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,pt, 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 1.57 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.87 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 72 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 us2000aaei Id of event.
Event Code 2000aaei An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000aaei,pt17233050, A comma-separated list of event ids that are associated to an event.

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