Earthquake with magnitude of ML 1.7 on date 29-10-2020 and time 20:15:56 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 1.7 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 29-10-2020 20:15:56 (UTC)
  • 29-10-2020 21:15:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.56, 13.38 at 11 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.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km N of Palermo (674435 inhabitants)
54 Km N of Bagheria (55387 inhabitants)
97 Km NE of Trapani (68759 inhabitants)
Recent and historical Seismicity
Seismic hazard
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 ( 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
ML 1.7 2020-10-29
38.56 13.38 11 2020-10-29
Sala Sismica INGV-Roma 84244331
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-10-29 20:15:56 ± 0.32
Latitude 38.56 ± 0.02
Longitude 13.38 ± 0.03
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84244331


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2210
Semi-minor axis of confidence ellipse (meter) 2160
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 339
Circular confidence region, given by single value of horizontal uncertainty (meter) 2210
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.62
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.9317
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 7
Magnitude information


Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 84244331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-29 20:31:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-10-29T20:17:44.88 3.0 undecidable manual Sn -0.08 0
IV.MTMR.EHZ. 2020-10-29T20:17:01.05 3.0 undecidable manual Sn 0.02 0
IV.CSLB.HHZ. 2020-10-29T20:16:23.80 0.6 undecidable manual S 139 0.8148 50 1.09 31
IV.MBFT.HHZ. 2020-10-29T20:16:20.40 0.3 undecidable manual S 209 0.6979 50 1.16 46
IV.IACL.HHZ. 2020-10-29T20:16:20.60 1.0 undecidable manual S 92 0.7599 50 -0.48 21
IV.IFIL.HHE. 2020-10-29T20:16:14.02 0.3 undecidable manual P 89 0.9317 50 0.58 57
IV.ERC.EHE. 2020-10-29T20:16:11.16 0.3 undecidable manual P 230 0.8121 50 -0.25 64
IV.CSLB.HHZ. 2020-10-29T20:16:11.41 0.3 undecidable manual P 139 0.8148 50 -0.05 67
IV.MBFT.HHZ. 2020-10-29T20:16:10.41 0.3 undecidable manual P 209 0.6979 50 0.96 51
IV.IACL.HHZ. 2020-10-29T20:16:10.32 0.6 undecidable manual P 92 0.7599 50 -0.19 44
IV.MPG.HHZ. 2020-10-29T20:16:09.50 0.3 undecidable manual S 183 0.3957 50 -0.79 59
IV.MPG.HHZ. 2020-10-29T20:16:02.92 0.1 undecidable manual P 183 0.3957 50 -1.36 60
IV.USI.HHZ. 2020-10-29T20:16:01.19 0.1 undecidable manual P 313 0.2194 50 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.USI.HHE. ML:1.8 0.000339 0.3 AML other m 2020-10-29T20:16:08.32
IV.USI.HHN. ML:2.2 0.000958 0.5 AML other m 2020-10-29T20:16:08.48
IV.MBFT.HHN. ML:1.6 6.16E-5 0.42 AML other m 2020-10-29T20:16:21.48
IV.MBFT.HHE. ML:1.6 5.525E-5 0.78 AML other m 2020-10-29T20:16:22.07
IV.CSLB.HHE. ML:1.5 4.215E-5 0.42 AML other m 2020-10-29T20:16:27.97
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download