Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 25-11-2020 and time 22:05:27 (Italy) in region Tirreno Meridionale (MARE)

A magnitude ML 1.6 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 25-11-2020 21:05:27 (UTC)
  • 25-11-2020 22:05:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 39.16, 15.46 at 43 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
71 Km W of Cosenza (67546 inhabitants)
77 Km W of Lamezia Terme (70714 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.6 2020-11-25
21:05:27		 39.16 15.46 43 2020-11-25
21:20:02		 Sala Sismica INGV-Roma 85017491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-25 21:05:27 ± 0.58
Latitude 39.16 ± 0.02
Longitude 15.46 ± 0.02
Depth (km) 43 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85017491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2058
Semi-minor axis of confidence ellipse (meter) 1679
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 328
Circular confidence region, given by single value of horizontal uncertainty (meter) 2060
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 313
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.96407
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.6
Num. used stations 6
Type of magnitude ML
Reference to an origin 85017491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-25 21:20:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
MN.CEL.HHZ. 2020-11-25T21:05:58.70 0.6 undecidable manual S 159 0.9641 95 0.59 52
IV.IVUG.HHZ. 2020-11-25T21:05:56.12 0.6 undecidable manual S 206 0.849 96 0.74 56
IV.MSRU.HHZ. 2020-11-25T21:05:55.68 0.6 undecidable manual S 177 0.8984 95 -0.88 51
IV.IVPL.HNZ. 2020-11-25T21:05:55.90 0.6 undecidable manual S 205 0.8687 96 0.05 64
IV.PETRA.HHZ. 2020-11-25T21:05:48.02 3.0 positive manual P 0 0
MN.CEL.HHZ. 2020-11-25T21:05:45.15 0.3 undecidable manual P 159 0.9641 95 -0.14 94
IV.IST3.HHZ. 2020-11-25T21:05:44.49 0.3 undecidable manual S 206 0.4029 117 -0.55 100
IV.MSRU.HHZ. 2020-11-25T21:05:43.69 0.6 undecidable manual P 177 0.8984 95 -0.71 53
IV.IVUG.HHZ. 2020-11-25T21:05:43.81 0.3 undecidable manual P 206 0.849 96 0.1 97
IV.IVPL.HNZ. 2020-11-25T21:05:43.75 0.3 undecidable manual P 205 0.8687 96 -0.23 90
IV.IST3.HHZ. 2020-11-25T21:05:38.26 0.3 undecidable manual P 206 0.4029 117 0.52 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.IST3.HHE. ML:3 0.0020863505 0.3072 AML other m 2020-11-25T21:05:41.71
IV.IST3.HHN. ML:3.2 0.0028060295 0.256 AML other m 2020-11-25T21:05:42.49
IV.MSRU.HHE. ML:1.8 5.9399125E-5 0.4352 AML other m 2020-11-25T21:05:56.42
IV.MSRU.HHN. ML:1.4 1.864202E-5 0.3072 AML other m 2020-11-25T21:05:57.29
MN.CEL.HHE. ML:1.3 1.29797031E-5 0.4352 AML other m 2020-11-25T21:06:00.53
MN.CEL.HHN. ML:1.4 2.2347925E-5 0.4864 AML other m 2020-11-25T21:06:00.62
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download