Earthquake with magnitude of ML 1.3 on date 31-12-2020 and time 20:04:36 (Italy) in region 3 km SE Priolo Gargallo (SR)

A magnitude ML 1.3 earthquake occured in region: 3 km SE Priolo Gargallo (SR), on

  • 31-12-2020 19:04:36 (UTC)
  • 31-12-2020 20:04:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.15, 15.22 at 26 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Priolo Gargallo SR 3 12091 12091
Melilli SR 9 13621 25712
Floridia SR 9 22762 48474
Augusta SR 10 36305 84779
Solarino SR 10 8091 92870
Siracusa SR 12 122291 215161
Sortino SR 16 8690 223851
Canicattini Bagni SR 18 7109 230960

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km NW of Siracusa (122291 inhabitants)
41 Km S of Catania (314555 inhabitants)
50 Km NE of Ragusa (73313 inhabitants)
51 Km NE of Modica (54633 inhabitants)
52 Km S of Acireale (52622 inhabitants)
64 Km E of Vittoria (63339 inhabitants)
86 Km E of Gela (75827 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.3 2020-12-31
19:04:36
37.15 15.22 27 2021-02-26
14:56:20
Bollettino Sismico Italiano INGV 87481181
Reviewed
Rev100
ML 1.3 2020-12-31
19:04:38
37.07 14.94 11 2020-12-31
19:18:19
Sala Sismica INGV-Roma 85911481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-31 19:04:36 ± 0.18
Latitude 37.15 ± 0.01
Longitude 15.22 ± 0.01
Depth (km) 27 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87481181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1159
Semi-minor axis of confidence ellipse (meter) 212
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 249
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) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.393
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 87481181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-25 17:15:04

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 85911481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-31 19:18:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2020-12-31T19:04:50.49 0.3 undecidable manual S 307 0.3408 119 -0.07 71
IV.HAVL.HHZ. 2020-12-31T19:04:47.18 0.6 undecidable manual S 202 0.2005 135 -0.05 49
IV.HCRL.HHZ. 2020-12-31T19:04:47.49 0.3 undecidable manual S 313 0.2005 135 0.26 72
IV.SSY.HHZ. 2020-12-31T19:04:45.60 0.6 undecidable manual S 276 0.1142 152 -0.1 49
IV.HMDC.HNN. 2020-12-31T19:04:45.67 0.1 undecidable manual P 242 0.393 115 0.09 95
IV.HLNI.HHZ. 2020-12-31T19:04:44.71 0.3 undecidable manual P 307 0.3408 119 -0.07 72
IV.HAVL.HHZ. 2020-12-31T19:04:42.80 0.3 undecidable manual P 202 0.2005 135 -0.06 74
IV.HCRL.HHZ. 2020-12-31T19:04:42.91 0.3 undecidable manual P 313 0.2005 135 0.05 74
IV.SSY.HHZ. 2020-12-31T19:04:41.91 0.1 positive manual P 276 0.1142 152 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HAVL.HHE. ML:1.4 0.0001117 0.82 AML other m 2020-12-31T19:04:47.10
IV.HAVL.HHN. ML:1.5 0.000151 0.42 AML other m 2020-12-31T19:04:47.67
IV.SSY.HHE. ML:1.5 0.00017332291 0.0768 AML other m 2020-12-31T19:04:47.48
IV.SSY.HHN. ML:1.8 0.00035946165 0.1024 AML other m 2020-12-31T19:04:47.58
IV.HCRL.HHN. ML:1 4.1240718E-5 0.2176 AML other m 2020-12-31T19:04:47.67
IV.HCRL.HHE. ML:1.1 5.4213135E-5 0.1024 AML other m 2020-12-31T19:04:47.69
IV.HLNI.HHN. ML:0.9 2.7176795E-5 0.3584 AML other m 2020-12-31T19:04:50.69
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