Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 06-12-2020 and time 22:37:28 (UTC) in region 5 km SE Bronte (CT)

A magnitude ML 2.3 earthquake occured in region: 5 km SE Bronte (CT), on

  • 06-12-2020 22:37:28 (UTC)
  • 06-12-2020 23:37:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.77, 14.88 at 28 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.

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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
Bronte CT 5 19172 19172
Maletto CT 7 3920 23092
Adrano CT 12 36122 59214
Maniace CT 12 3765 62979
Biancavilla CT 14 24007 86986
Randazzo CT 14 10900 97886
Ragalna CT 16 3924 101810
Santa Maria di Licodia CT 17 7641 109451
Cesarò ME 17 2439 111890
San Teodoro ME 18 1403 113293
Santa Domenica Vittoria ME 18 980 114273

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Acireale (52622 inhabitants)
35 Km NW of Catania (314555 inhabitants)
76 Km SW of Messina (238439 inhabitants)
77 Km SW of Reggio di Calabria (183035 inhabitants)
78 Km E of Caltanissetta (63360 inhabitants)
87 Km NW of Siracusa (122291 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
96 Km NE of Gela (75827 inhabitants)
96 Km NE of Vittoria (63339 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 2.3 2020-12-06
22:37:28		 37.77 14.88 28 2021-02-26
14:56:19		 Bollettino Sismico Italiano INGV 87307021
Reviewed
Rev200 		ML 1.9 2020-12-06
22:37:28		 37.79 14.89 18 2021-02-19
22:50:56		 Sala Operativa INGV_OE (Catania) 85254281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-06 22:37:28 ± 0.15
Latitude 37.77 ± 0.01
Longitude 14.88 ± 0.01
Depth (km) 28 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87307021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 807
Semi-minor axis of confidence ellipse (meter) 616
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 277
Circular confidence region, given by single value of horizontal uncertainty (meter) 810
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.05936
Epicentral distance of station farthest from the epicenter (degree) 0.82917
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 87307021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-19 22:45:54

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85254281
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-12-06 23:20:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2020-12-06T22:37:50.24 0.6 undecidable manual S 166 0.6277 106 0.35 42
IV.MPNC.HHZ. 2020-12-06T22:37:47.78 0.6 undecidable manual S 44 0.5333 109 0.57 41
IV.HAVL.HHZ. 2020-12-06T22:37:44.24 0.3 undecidable manual P 166 0.8292 102 0.18 63
IV.HLNI.HHZ. 2020-12-06T22:37:43.78 0.6 undecidable manual S 181 0.4182 115 -0.26 45
IV.SSY.HHZ. 2020-12-06T22:37:40.64 0.3 undecidable manual P 166 0.6277 106 -0.08 67
IV.ECTS.HHZ. 2020-12-06T22:37:39.27 0.6 undecidable manual S 59 0.2239 134 0.02 49
IV.MPNC.HHZ. 2020-12-06T22:37:39.31 0.1 undecidable manual P 44 0.5333 109 0.14 91
IV.ESML.HHZ. 2020-12-06T22:37:38.24 0.6 undecidable manual S 179 0.1484 146 0.44 46
IV.EPIT.HHN. 2020-12-06T22:37:38.16 0.6 undecidable manual S 72 0.1484 146 0.35 46
IV.ECBD.HHN. 2020-12-06T22:37:38.18 0.6 undecidable manual S 85 0.1655 143 0.08 49
IV.HLNI.HHZ. 2020-12-06T22:37:37.22 0.3 undecidable manual P 181 0.4182 115 -0.12 70
IV.ESLN.HHZ. 2020-12-06T22:37:36.76 0.6 undecidable manual S 134 0.1061 155 -0.43 47
IV.MSFR.HHZ. 2020-12-06T22:37:36.62 0.3 undecidable manual P 320 0.3498 120 0.31 69
IV.EPZF.HHZ. 2020-12-06T22:37:36.99 0.6 undecidable manual S 344 0.0594 165 0.28 48
IV.GALF.HHZ. 2020-12-06T22:37:35.30 0.3 undecidable manual P 257 0.2518 130 0.36 69
IV.MUCR.HHZ. 2020-12-06T22:37:35.17 0.1 undecidable manual P 359 0.2761 127 -0.09 96
IV.EVRN.HHZ. 2020-12-06T22:37:34.06 0.3 undecidable manual P 111 0.2176 135 -0.44 68
IV.ENIC.HHE. 2020-12-06T22:37:34.70 0.3 undecidable manual P 140 0.1763 141 0.67 63
IV.ECTS.HHZ. 2020-12-06T22:37:34.26 0.1 undecidable manual P 59 0.2239 134 -0.32 93
IV.ECBD.HHN. 2020-12-06T22:37:33.94 0.1 undecidable manual P 85 0.1655 143 0.03 99
IV.ECHR.HHE. 2020-12-06T22:37:33.05 0.6 undecidable manual P 161 0.0845 159 -0.19 49
IV.ESLN.HHZ. 2020-12-06T22:37:33.19 0.3 undecidable manual P 134 0.1061 155 -0.19 73
IV.ESML.HHZ. 2020-12-06T22:37:33.68 0.1 undecidable manual P 179 0.1484 146 -0.06 99
IV.EMCN.HHZ. 2020-12-06T22:37:33.41 0.6 undecidable manual P 79 0.1259 151 -0.13 49
IV.EPIT.HHN. 2020-12-06T22:37:33.76 0.1 undecidable manual P 72 0.1484 146 0.02 100
IV.EMSG.HHZ. 2020-12-06T22:37:32.92 0.1 positive manual P 46 0.0782 161 -0.28 96
IV.EPZF.HHZ. 2020-12-06T22:37:32.77 0.1 positive manual P 344 0.0594 165 -0.34 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPZF.HHE. ML:2.7 0.002655 0.5 AML other m 2020-12-06T22:37:37.61
IV.EPZF.HHN. ML:2.5 0.001795 0.72 AML other m 2020-12-06T22:37:37.83
IV.EMCN.HHN. ML:2.5 0.001665 0.56 AML other m 2020-12-06T22:37:38.80
IV.EMCN.HNN. ML:2.5 0.001695 0.56 AML other m 2020-12-06T22:37:38.80
IV.EMCN.HHE. ML:2.6 0.002 0.52 AML other m 2020-12-06T22:37:39.84
IV.EMCN.HNE. ML:2.6 0.002035 0.56 AML other m 2020-12-06T22:37:39.85
IV.ECTS.HHE. ML:2.2 0.0006065 0.96 AML other m 2020-12-06T22:37:39.92
IV.EMSG.HHN. ML:2.4 0.00153 0.3 AML other m 2020-12-06T22:37:39.92
IV.ECTS.HHN. ML:2.2 0.0005755 1.16 AML other m 2020-12-06T22:37:39.34
IV.EMSG.HHE. ML:2.5 0.001575 1.32 AML other m 2020-12-06T22:37:41.81
IV.MUCR.HHE. ML:1.8 0.0002105 0.42 AML other m 2020-12-06T22:37:41.56
IV.MUCR.HHN. ML:1.8 0.000212 1 AML other m 2020-12-06T22:37:42.27
IV.GALF.HNE. ML:1.8 0.0002055 1.2 AML other m 2020-12-06T22:37:42.86
IV.GALF.HNN. ML:1.7 0.0001965 1.58 AML other m 2020-12-06T22:37:43.79
IV.GALF.HHN. ML:2.5 0.001262 1.62 AML other m 2020-12-06T22:37:43.82
IV.GALF.HHE. ML:2.5 0.001105 0.56 AML other m 2020-12-06T22:37:43.78
IV.MPNC.HHN. ML:2.2 0.000285 0.56 AML other m 2020-12-06T22:37:48.33
IV.MPNC.HHE. ML:2.1 0.000231 0.46 AML other m 2020-12-06T22:37:49.63
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