Earthquake with magnitude of ML 1.6 on date 01-12-2020 and time 16:47:46 (Italy) in region 7 km NW Siracusa (SR)

A magnitude ML 1.6 earthquake occured in region: 7 km NW Siracusa (SR), on

  • 01-12-2020 15:47:46 (UTC)
  • 01-12-2020 16:47:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.1, 15.24 at 29 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
Siracusa SR 7 122291 122291
Floridia SR 8 22762 145053
Priolo Gargallo SR 8 12091 157144
Solarino SR 10 8091 165235
Melilli SR 13 13621 178856
Augusta SR 15 36305 215161
Canicattini Bagni SR 17 7109 222270
Sortino SR 19 8690 230960

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km NW of Siracusa (122291 inhabitants)
47 Km S of Catania (314555 inhabitants)
49 Km E of Ragusa (73313 inhabitants)
50 Km NE of Modica (54633 inhabitants)
57 Km S of Acireale (52622 inhabitants)
64 Km E of Vittoria (63339 inhabitants)
87 Km E of Gela (75827 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 2020-12-01
15:47:46
37.1 15.23 29 2020-12-01
15:55:52
Sala Sismica INGV-Roma 85128661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-01 15:47:46 ± 0.36
Latitude 37.10 ± 0.01
Longitude 15.23 ± 0.02
Depth (km) 29 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85128661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1393
Semi-minor axis of confidence ellipse (meter) 1103
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 1390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 231
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.42088
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 85128661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-01 15:55:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
AC.VLO.HHZ. 2020-12-01T15:49:43.67 3.0 undecidable manual Sn -9.99 0
IV.SGG.HHZ. 2020-12-01T15:49:33.79 3.0 undecidable manual Sn -9.64 0
IV.SENA.HHZ. 2020-12-01T15:49:02.66 3.0 undecidable manual Pn -7.64 0
XK.ALB1.HNZ. 2020-12-01T15:48:52.24 3.0 undecidable manual Sg -0.03 0
IV.MTGR.HHZ. 2020-12-01T15:48:24.48 3.0 undecidable manual Pg 2.26 0
IV.RESU.HHZ. 2020-12-01T15:48:22.50 3.0 undecidable manual Sg -0.78 0
IV.SPS2.HHZ. 2020-12-01T15:48:20.41 3.0 undecidable manual Pn -5.9 0
IV.HPAC.HHZ. 2020-12-01T15:48:03.73 3.0 undecidable manual S 0
IV.HVZN.HHE. 2020-12-01T15:48:03.16 0.6 undecidable manual S 281 0.4209 116 0.56 43
IV.HMDC.HHE. 2020-12-01T15:48:01.62 0.3 undecidable manual S 249 0.3876 118 -0.1 70
IV.HLNI.HHZ. 2020-12-01T15:48:01.42 0.3 undecidable manual S 311 0.3795 119 -0.1 70
IV.GALF.HHZ. 2020-12-01T15:47:59.36 3.0 negative manual Pn -4.43 0
IV.ACATE.EHZ. 2020-12-01T15:47:57.82 3.0 undecidable manual P -1.79 0
IV.HAGA.HHZ. 2020-12-01T15:47:57.01 0.3 undecidable manual S 341 0.1943 139 -0.19 71
IV.HVZN.HHE. 2020-12-01T15:47:56.07 0.1 undecidable manual P 281 0.4209 116 0.25 92
IV.HAVL.HHZ. 2020-12-01T15:47:56.74 0.3 undecidable manual S 212 0.1682 144 0.02 75
IV.SSY.HHZ. 2020-12-01T15:47:56.17 0.3 undecidable manual S 294 0.1403 149 -0.09 74
IV.HLNI.HHZ. 2020-12-01T15:47:55.11 0.1 undecidable manual P 311 0.3795 119 -0.09 93
IV.HPAC.HHZ. 2020-12-01T15:47:55.56 3.0 undecidable manual P 0
IV.HMDC.HHE. 2020-12-01T15:47:54.63 0.1 undecidable manual P 249 0.3876 118 -0.69 78
IV.HAVL.HHZ. 2020-12-01T15:47:52.69 0.1 undecidable manual P 212 0.1682 144 0.27 96
IV.SSY.HHZ. 2020-12-01T15:47:52.27 0.1 undecidable manual P 294 0.1403 149 0.11 100
IV.HAGA.HHZ. 2020-12-01T15:47:52.86 0.3 negative manual P 341 0.1943 139 0.16 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHE. ML:1.7 0.000212 0.24 AML other m 2020-12-01T15:47:56.85
IV.HAVL.HHN. ML:1.8 0.0002425 1.44 AML other m 2020-12-01T15:47:57.79
IV.HAGA.HHE. ML:1.4 0.00011365 0.44 AML other m 2020-12-01T15:47:57.06
IV.HAGA.HHN. ML:1.5 0.0001197 0.84 AML other m 2020-12-01T15:47:57.43
IV.MTGR.HHN. ML:2.8 0.0001376 0.44 AML other m 2020-12-01T15:48:31.87
IV.MTGR.HHE. ML:2.6 8.335E-5 1.14 AML other m 2020-12-01T15:48:32.00
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