Light earthquake, 4.1 mag was detected near Charlotte Amalie in U.S. Virgin Islands

A light earthquake with magnitude 4.1 (ml/mb) was reported 64 kilometers (40 miles) from Charlotte Amalie in U.S. Virgin Islands on Sunday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: pt18273001. Event ids that are associated: pt18273001. Global time and date of event 30/09/18 / 2018-09-30 23:29:42 / September 30, 2018 @ 11:29 pm UTC/GMT. The temblor was picked up at 19:29:42 / 7:29 pm (local time epicenter). Exact location of earthquake, -65.158° West, 18.878° North, depth 20 km. The earthquake occurred at a depth of 20 km (12 miles).

Epicenter of the event was 81 km (50 miles) from Fajardo (c. 34 100 pop), 76 km (47 miles) from Tortola (c. 23 900 pop), 64 km (40 miles) from Charlotte Amalie (c. 20 000 pop), 90 km (56 miles) from Río Grande (c. 13 500 pop), 86 km (54 miles) from Isabel Segunda (c. 9 300 pop), 76 km (47 miles) from Road Town (c. 8 400 pop). Nearest cities/city/villages to epicentrum/hypocenter was Loíza, Río Grande, Isabel Segunda (min 5000 pop). Close country/countries that might be effected, Puerto Rico (c. 3 917 000 pop), British Virgin Islands (c. 22 000 pop), U.S. Virgin Islands (c. 109 000 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been four, in the last 10 days fourteen, in the past 30 days thirty-four and in the last 365 days four hundred and thirty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light quakes in the world each year.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 64 km NNW of Charlotte Amalie, U.S. Virgin Islands.

More information

Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	-65.158° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	18.878° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	20 km	Depth of the event in kilometers.
Place	64km NNW of Charlotte Amalie, U.S. Virgin Islands	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2018-09-30 23:29:42	Time when the event occurred. UTC/GMT
Updated	2018-09-30 23:33:14	Time when the event was most recently updated. UTC/GMT
Timezone offset	-240	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	259	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	pt	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,pt,	A comma-separated list of network contributors.
Number of Stations Used	15	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance		Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap		The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	Ml	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	pt18273001	Id of event.
Event Code	18273001	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,pt18273001,	A comma-separated list of event ids that are associated to an event.

Parameter

Value

Description

Magnitude

4.1 mb

The magnitude for the event.

Longitude

-65.158° West

Decimal degrees longitude. Negative values for western longitudes.

Latitude

18.878° North

Decimal degrees latitude. Negative values for southern latitudes.

Depth

20 km

Depth of the event in kilometers.

Place

64km NNW of Charlotte Amalie, U.S. Virgin Islands

Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.

Time

2018-09-30 23:29:42

Time when the event occurred. UTC/GMT

Updated

2018-09-30 23:33:14

Time when the event was most recently updated. UTC/GMT

Timezone offset

-240

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

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

259

A number describing how significant the event is. Larger numbers indicate a more significant event.

Network

The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.

Sources

,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

Horizontal distance from the epicenter to the nearest station (in degrees).

Root Mean Square

sec

The root-mean-square (RMS) travel time residual, in sec, using all weights.

Azimuthal Gap

The largest azimuthal gap between azimuthally adjacent stations (in degrees).

Magnitude Type

The method or algorithm used to calculate the preferred magnitude for the event.

Event Type

earthquake

Type of seismic event.

Event ID

pt18273001

Id of event.

Event Code

18273001

An identifying code assigned by, and unique from, the corresponding source for the event.

Event IDS

,pt18273001,

A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.1 mag was detected near Charlotte Amalie in U.S. Virgin Islands

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