Earthquake with magnitude of ML 1.9 on date 18-01-2021 and time 03:10:58 (Italy) in region 3 km W Sperlinga (EN)

A magnitude ML 1.9 earthquake occured in region: 3 km W Sperlinga (EN), on

  • 18-01-2021 02:10:58 (UTC)
  • 18-01-2021 03:10:58 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.76, 14.32 at 20 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sperlinga EN 3 805 805
Nicosia EN 7 13899 14704
Gangi PA 11 6811 21515
Castel di Lucio ME 15 1294 22809
Leonforte EN 15 13439 36248
Nissoria EN 16 3000 39248
Assoro EN 17 5191 44439
Capizzi ME 17 3176 47615
Cerami EN 18 2006 49621
Geraci Siculo PA 18 1945 51566
Calascibetta EN 19 4528 56094
Petralia Soprana PA 19 3360 59454
Bompietro PA 19 1401 60855
Alimena PA 19 2032 62887
Gagliano Castelferrato EN 20 3593 66480
Mistretta ME 20 4791 71271

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NE of Caltanissetta (63360 inhabitants)
73 Km W of Catania (314555 inhabitants)
76 Km W of Acireale (52622 inhabitants)
77 Km N of Gela (75827 inhabitants)
79 Km E of Bagheria (55387 inhabitants)
82 Km NE of Agrigento (59770 inhabitants)
92 Km N of Vittoria (63339 inhabitants)
93 Km E of Palermo (674435 inhabitants)
99 Km NW of Ragusa (73313 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 1.9 2021-01-18
02:10:58
37.76 14.32 20 2021-01-18
02:31:12
Sala Sismica INGV-Roma 86343011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-18 02:10:58 ± 0.34
Latitude 37.76 ± 0.03
Longitude 14.32 ± 0.03
Depth (km) 20 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86343011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 3746
Semi-minor axis of confidence ellipse (meter) 856
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 3750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 192
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.17897
Epicentral distance of station farthest from the epicenter (degree) 0.52161
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 86343011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-18 02:31:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-01-18T02:11:09.67 0.1 undecidable manual P 57 0.5216 101 0.38 88
IV.CSLB.HHZ. 2021-01-18T02:11:09.85 0.3 undecidable manual S 311 0.2734 114 -0.05 75
IV.PLLN.EHZ. 2021-01-18T02:11:09.79 0.1 undecidable manual S 329 0.2725 114 -0.09 98
IV.GALF.HHZ. 2021-01-18T02:11:08.21 0.3 undecidable manual S 103 0.2005 123 0.21 76
IV.PETRA.HHZ. 2021-01-18T02:11:07.78 0.3 undecidable manual S 295 0.179 127 0.31 74
IV.CSLB.HHZ. 2021-01-18T02:11:05.03 0.1 undecidable manual P 311 0.2734 114 -0.19 98
IV.PLLN.EHZ. 2021-01-18T02:11:05.12 0.1 undecidable manual P 329 0.2725 114 -0.09 100
IV.GALF.HHZ. 2021-01-18T02:11:03.85 0.1 undecidable manual P 103 0.2005 123 -0.27 97
IV.PETRA.HHZ. 2021-01-18T02:11:03.98 0.1 undecidable manual P 295 0.179 127 0.17 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GALF.HHN. ML:2.6 0.00189 0.38 AML other m 2021-01-18T02:11:11.62
IV.PETRA.HHN. ML:1.9 0.0004145 0.5 AML other m 2021-01-18T02:11:12.45
IV.GALF.HHE. ML:2.4 0.001285 0.5 AML other m 2021-01-18T02:11:13.89
IV.PETRA.HHE. ML:1.9 0.0004605 0.54 AML other m 2021-01-18T02:11:14.12
IV.GALF.HNE. ML:1.5 0.0001663407 0.7408 AML other m 2021-01-18T02:11:10.08
IV.GALF.HNN. ML:1.6 0.00023678185 0.36 AML other m 2021-01-18T02:11:11.63
IV.PLLN.EHE. ML:2.1 0.00051152065 0.6608 AML other m 2021-01-18T02:11:10.48
IV.PLLN.EHN. ML:2.1 0.00057583695 0.9392 AML other m 2021-01-18T02:11:16.82
IV.MUCR.HHE. ML:2 0.0001818346 1.4 AML other m 2021-01-18T02:11:26.86
IV.MUCR.HHN. ML:1.8 0.00014066935 0.6016 AML other m 2021-01-18T02:11:18.55
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