Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 03-12-2020 and time 00:56:45 (Italy) in region 10 km N Ragalna (CT)

A magnitude ML 1.8 earthquake occured in region: 10 km N Ragalna (CT), on

  • 02-12-2020 23:56:45 (UTC)
  • 03-12-2020 00:56:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.72, 14.97 at 5 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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Ragalna CT 10 3924 3924
Zafferana Etnea CT 12 9517 13441
Nicolosi CT 12 7463 20904
Biancavilla CT 12 24007 44911
Milo CT 13 1087 45998
Pedara CT 13 14102 60100
Santa Maria di Licodia CT 13 7641 67741
Belpasso CT 14 28108 95849
Adrano CT 14 36122 131971
Trecastagni CT 14 10910 142881
Bronte CT 15 19172 162053
Santa Venerina CT 15 8592 170645
Sant'Alfio CT 15 1582 172227
Maletto CT 16 3920 176147
Viagrande CT 16 8563 184710
San Pietro Clarenza CT 17 7743 192453
Paternò CT 17 48228 240681
Camporotondo Etneo CT 17 5023 245704
Mascalucia CT 17 31958 277662
Aci Bonaccorsi CT 18 3524 281186
Tremestieri Etneo CT 18 20589 301775
Aci Sant'Antonio CT 18 17984 319759
Randazzo CT 18 10900 330659
Giarre CT 19 27659 358318
San Giovanni la Punta CT 19 23060 381378
Gravina di Catania CT 19 25838 407216
Aci Catena CT 19 29851 437067
Sant'Agata li Battiati CT 20 9479 446546

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
26 Km NW of Catania (314555 inhabitants)
73 Km SW of Reggio di Calabria (183035 inhabitants)
74 Km SW of Messina (238439 inhabitants)
78 Km NW of Siracusa (122291 inhabitants)
84 Km E of Caltanissetta (63360 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
97 Km NE of Gela (75827 inhabitants)
97 Km N of Modica (54633 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 1.8 2020-12-02
23:56:45		 37.72 14.97 5 2020-12-03
00:07:13		 Sala Sismica INGV-Roma 85165551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-02 23:56:45 ± 0.1
Latitude 37.72 ± 0.00
Longitude 14.97 ± 0.01
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85165551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 590
Semi-minor axis of confidence ellipse (meter) 48
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 69
Circular confidence region, given by single value of horizontal uncertainty (meter) 590
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
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) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.78781
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 85165551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-03 00:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2020-12-02T23:56:57.28 0.1 undecidable manual P 172 0.5639 50 -0.26 86
IV.MUCR.HHE. 2020-12-02T23:56:53.24 0.1 undecidable manual P 346 0.3354 97 0.03 95
IV.AIO.HHE. 2020-12-02T23:56:53.09 0.1 undecidable manual P 39 0.3265 98 0.1 94
IV.HLNI.HHE. 2020-12-02T23:56:53.74 0.1 undecidable manual P 192 0.3768 97 -0.37 88
IV.GALF.HHE. 2020-12-02T23:56:52.72 0.1 undecidable manual P 269 0.3229 98 -0.2 92
IV.EVRN.HHZ. 2020-12-02T23:56:50.95 0.6 undecidable manual S 102 0.1304 109 -0.03 49
IV.EPOZ.HHE. 2020-12-02T23:56:50.02 0.1 undecidable manual P 105 0.1754 104 0.33 92
IV.ESML.HHZ. 2020-12-02T23:56:49.04 0.1 undecidable manual P 217 0.1241 110 0.43 91
IV.EPZF.HHE. 2020-12-02T23:56:49.22 0.1 undecidable manual P 319 0.1421 107 0.23 95
IV.ENIC.HHZ. 2020-12-02T23:56:49.73 0.3 undecidable manual S 156 0.0926 115 0.08 74
IV.EMSG.HHZ. 2020-12-02T23:56:49.61 0.3 undecidable manual S 349 0.1061 113 -0.49 68
IV.EVRN.HHZ. 2020-12-02T23:56:48.64 0.1 undecidable manual P 102 0.1304 109 -0.1 97
IV.EMSG.HHZ. 2020-12-02T23:56:48.32 0.1 undecidable manual P 349 0.1061 113 0.09 98
IV.ACATE.EHZ. 2020-12-02T23:56:48.36 1.0 undecidable manual P 0.7878 -9.99 0
IV.ECHR.HHE. 2020-12-02T23:56:47.57 0.1 undecidable manual P 238 0.0576 128 0.28 95
IV.ESLN.HHZ. 2020-12-02T23:56:47.07 0.6 undecidable manual S 180 0.0234 152 -0.53 45
IV.ENIC.HHZ. 2020-12-02T23:56:47.88 0.1 undecidable manual P 156 0.0926 115 -0.09 98
IV.ESLN.HHZ. 2020-12-02T23:56:46.86 0.1 undecidable manual P 180 0.0234 152 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHE. ML:0 0.00136265 0.6656 AML other m 2020-12-02T23:56:51.01
IV.ESLN.HHN. ML:0 0.0011695065 0.6528 AML other m 2020-12-02T23:56:50.49
IV.ENIC.HNE. ML:1.9 0.0013225185 5.0304 AML other m 2020-12-02T23:56:47.47
IV.ENIC.HNN. ML:2 0.0017945985 3.1872 AML other m 2020-12-02T23:56:48.45
IV.ENIC.HHE. ML:1.6 0.0006167066 0.8576 AML other m 2020-12-02T23:56:53.03
IV.EMSG.HHN. ML:1.8 0.00084627775 0.7424 AML other m 2020-12-02T23:56:51.16
IV.ACATE.HNE. ML:2.6 0.00057514675 1.2416 AML other m 2020-12-02T23:56:49.49
IV.ACATE.HNN. ML:2.6 0.00057280275 1.3568 AML other m 2020-12-02T23:56:49.68
IV.EVRN.HHE. ML:1.9 0.0009049029 0.4992 AML other m 2020-12-02T23:56:52.47
IV.EVRN.HNN. ML:1.9 0.0010004704 0.4864 AML other m 2020-12-02T23:56:52.49
IV.ESML.HHE. ML:1.5 0.00039185675 1.1264 AML other m 2020-12-02T23:56:52.96
IV.ESML.HHN. ML:1.5 0.0004187057 0.8704 AML other m 2020-12-02T23:56:53.23
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