Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.6 on date 06-12-2020 and time 23:38:26 (Italy) in region 8 km SE Bronte (CT)

A magnitude ML 2.6 earthquake occured in region: 8 km SE Bronte (CT), on

  • 06-12-2020 22:38:26 (UTC)
  • 06-12-2020 23:38:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7560, 14.9110 at 25 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 8 19172 19172
Maletto CT 9 3920 23092
Adrano CT 12 36122 59214
Biancavilla CT 13 24007 83221
Randazzo CT 14 10900 94121
Ragalna CT 14 3924 98045
Maniace CT 15 3765 101810
Santa Maria di Licodia CT 16 7641 109451
Zafferana Etnea CT 18 9517 118968
Santa Domenica Vittoria ME 18 980 119948
Milo CT 18 1087 121035
Nicolosi CT 19 7463 128498
Belpasso CT 19 28108 156606
Paternò CT 20 48228 204834

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Acireale (52622 inhabitants)
32 Km NW of Catania (314555 inhabitants)
75 Km SW of Messina (238439 inhabitants)
75 Km SW of Reggio di Calabria (183035 inhabitants)
80 Km E of Caltanissetta (63360 inhabitants)
84 Km NW of Siracusa (122291 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
96 Km NE of Vittoria (63339 inhabitants)
96 Km NE of Gela (75827 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 2.6 2020-12-06
22:38:26		 37.7563 14.911 25 2021-02-26
14:56:19		 Bollettino Sismico Italiano INGV 87307151
Reviewed
Rev200 		ML 2.1 2020-12-06
22:38:26		 37.762 14.921 13 2021-02-19
22:51:14		 Sala Operativa INGV_OE (Catania) 85254171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-06 22:38:26 ± 0.12
Latitude 37.7563 ± 0.0054
Longitude 14.9110 ± 0.0091
Depth (km) 25 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87307151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 611
Semi-minor axis of confidence ellipse (meter) 583
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 56
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 33
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 44
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.07015
Epicentral distance of station farthest from the epicenter (degree) 1.55673
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85254171
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-12-06 23:10:53

ML:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 87307151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-19 22:50:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MBFT.HHZ. 2020-12-06T22:38:54.16 0.3 undecidable manual P 278 172.7937 54 1.12 37
IV.HAVL.HHZ. 2020-12-06T22:38:53.09 0.6 undecidable manual S 168 90.3429 100 -0.01 44
IV.HMDC.HHZ. 2020-12-06T22:38:53.29 0.6 undecidable manual S 187 89.1441 100 0.48 40
IV.SSY.HHZ. 2020-12-06T22:38:47.75 0.3 undecidable manual S 168 67.8765 104 0.48 62
IV.MPNC.HHZ. 2020-12-06T22:38:45.36 0.6 undecidable manual S 42 57.9975 107 0.64 40
IV.HAGA.HHZ. 2020-12-06T22:38:44.58 0.6 undecidable manual S 158 56.499 108 0.24 44
IV.CPTP.HHZ. 2020-12-06T22:38:41.32 0.3 undecidable manual P 240 76.368 102 1.7 33
IV.HAVL.HHZ. 2020-12-06T22:38:41.35 0.3 undecidable manual P 168 90.3429 100 -0.39 60
IV.HLNI.HHZ. 2020-12-06T22:38:41.35 0.6 undecidable manual S 184 45.3213 112 -0.19 46
IV.HMDC.HHZ. 2020-12-06T22:38:41.01 0.3 undecidable manual P 187 89.1441 100 -0.56 58
IV.MSFR.HHZ. 2020-12-06T22:38:40.76 0.6 undecidable manual S 318 41.625 115 0.14 47
IV.PETRA.HHZ. 2020-12-06T22:38:39.10 0.3 undecidable manual P 277 70.2741 104 0.38 63
IV.CSLB.HHZ. 2020-12-06T22:38:39.58 0.3 undecidable manual P 285 77.367 102 -0.21 64
IV.RAFF.HHZ. 2020-12-06T22:38:39.76 0.3 undecidable manual P 219 76.368 102 0.12 66
IV.MUCR.HHZ. 2020-12-06T22:38:38.14 0.6 undecidable manual S 354 31.9458 122 -0.21 47
IV.SSY.HHZ. 2020-12-06T22:38:38.20 0.3 undecidable manual P 168 67.8765 104 -0.16 66
IV.HAGA.HHZ. 2020-12-06T22:38:36.32 0.3 undecidable manual P 158 56.499 108 -0.35 65
IV.MPNC.HHZ. 2020-12-06T22:38:36.93 0.1 positive manual P 42 57.9975 107 0.03 93
IV.ECTS.HHZ. 2020-12-06T22:38:36.61 0.6 undecidable manual S 53 23.0547 132 0.15 48
IV.EPIT.HHN. 2020-12-06T22:38:35.83 0.6 undecidable manual S 64 14.1747 147 0.91 38
IV.ESML.HHZ. 2020-12-06T22:38:35.76 0.6 undecidable manual S 190 15.5733 145 0.63 42
IV.ECBD.HHN. 2020-12-06T22:38:35.78 0.6 undecidable manual S 80 15.5733 144 0.65 42
IV.EMSG.HHZ. 2020-12-06T22:38:34.16 0.6 undecidable manual S 25 7.881 161 -0.02 51
IV.HLNI.HHZ. 2020-12-06T22:38:34.73 0.1 undecidable manual P 184 45.3213 112 -0.33 89
IV.EMCN.HHZ. 2020-12-06T22:38:34.89 0.6 undecidable manual S 70 11.3775 153 0.34 47
IV.EPZF.HHZ. 2020-12-06T22:38:34.43 0.6 undecidable manual S 328 8.88 158 0.16 49
IV.ECHR.HHE. 2020-12-06T22:38:34.20 0.6 undecidable manual S 179 7.7811 161 0.04 50
IV.ESLN.HHZ. 2020-12-06T22:38:34.09 0.6 undecidable manual S 141 8.88 158 -0.18 49
IV.MSFR.HHZ. 2020-12-06T22:38:34.21 0.3 undecidable manual P 318 41.625 115 -0.31 67
IV.GALF.HHZ. 2020-12-06T22:38:33.10 0.1 undecidable manual P 261 30.6471 123 0.06 97
IV.MUCR.HHZ. 2020-12-06T22:38:32.81 0.1 positive manual P 354 31.9458 122 -0.41 89
IV.EFIU.HHE. 2020-12-06T22:38:32.65 0.3 undecidable manual P 82 26.4513 128 0.12 72
IV.EPOZ.HHZ. 2020-12-06T22:38:32.94 0.3 undecidable manual P 111 26.0517 129 0.46 67
IV.ECBD.HHN. 2020-12-06T22:38:31.24 0.1 undecidable manual P 80 15.5733 144 -0.12 98
IV.ENIC.HHZ. 2020-12-06T22:38:31.18 0.3 undecidable manual P 145 16.872 142 -0.3 71
IV.ECTS.HHZ. 2020-12-06T22:38:31.91 0.1 undecidable manual P 53 23.0547 132 -0.22 94
IV.EPIT.HHN. 2020-12-06T22:38:31.34 0.1 undecidable manual P 64 14.1747 147 0.11 98
IV.EMCN.HHZ. 2020-12-06T22:38:31.08 0.1 positive manual P 70 11.3775 153 0.06 100
IV.EVRN.HHZ. 2020-12-06T22:38:31.70 0.1 negative manual P 111 21.0678 135 -0.2 95
IV.ESML.HHZ. 2020-12-06T22:38:31.21 0.3 undecidable manual P 190 15.5733 145 -0.14 73
IV.ESLN.HHZ. 2020-12-06T22:38:30.63 0.1 undecidable manual P 141 8.88 158 -0.23 97
IV.EMSG.HHZ. 2020-12-06T22:38:30.51 0.1 positive manual P 25 7.881 161 -0.3 96
IV.EPZF.HHZ. 2020-12-06T22:38:30.29 0.1 undecidable manual P 328 8.88 158 -0.57 89
IV.ECHR.HHE. 2020-12-06T22:38:30.67 0.1 undecidable manual P 179 7.7811 161 -0.13 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMCN.HHE. ML:2.9 0.00475 0.44 AML other m 2020-12-06T22:38:35.82
IV.EMCN.HHN. ML:2.9 0.004880000000000001 1.4 AML other m 2020-12-06T22:38:35.16
IV.EMCN.HNN. ML:2.9 0.0047 1.4 AML other m 2020-12-06T22:38:35.16
IV.EMCN.HNE. ML:2.9 0.00509 1.16 AML other m 2020-12-06T22:38:36.82
IV.ESML.HHE. ML:2.5 0.0017199999999999997 0.54 AML other m 2020-12-06T22:38:36.56
IV.ENIC.HNN. ML:2.6 0.002185 1.24 AML other m 2020-12-06T22:38:36.33
IV.EMSG.HHN. ML:2.9 0.004369999999999999 1.02 AML other m 2020-12-06T22:38:37.52
IV.ESML.HHN. ML:2.4 0.0014299999999999998 1.08 AML other m 2020-12-06T22:38:37.79
IV.EMSG.HHE. ML:2.8 0.003455 0.4 AML other m 2020-12-06T22:38:38.41
IV.EVRN.HNN. ML:2.4 0.0011995 1.82 AML other m 2020-12-06T22:38:39.98
IV.EVRN.HHN. ML:2.4 0.0011600000000000002 1.8 AML other m 2020-12-06T22:38:39.08
IV.MUCR.HHE. ML:2.1 0.000484 0.36 AML other m 2020-12-06T22:38:39.17
IV.GALF.HHN. ML:3.0 0.0034100000000000003 0.44 AML other m 2020-12-06T22:38:40.40
IV.ESLN.HHE. ML:2.4 0.00147 1.12 AML other m 2020-12-06T22:38:40.99
IV.GALF.HNE. ML:2.0 0.00039949999999999995 0.86 AML other m 2020-12-06T22:38:40.44
IV.GALF.HNN. ML:2.0 0.00038849999999999996 0.38 AML other m 2020-12-06T22:38:40.38
IV.GALF.HHE. ML:3.0 0.0032800000000000004 0.6 AML other m 2020-12-06T22:38:41.37
IV.MUCR.HHN. ML:2.2 0.0005045 1.56 AML other m 2020-12-06T22:38:41.10
IV.EPOZ.HHE. ML:2.3 0.000775 0.58 AML other m 2020-12-06T22:38:41.26
IV.ESLN.HHN. ML:2.3 0.001315 0.84 AML other m 2020-12-06T22:38:41.74
IV.ENIC.HNE. ML:2.6 0.0022249999999999995 1.78 AML other m 2020-12-06T22:38:41.02
IV.ENIC.HHE. ML:2.6 0.001815 0.34 AML other m 2020-12-06T22:38:42.01
IV.HLNI.HHN. ML:2.5 0.0008435000000000001 0.4 AML other m 2020-12-06T22:38:42.54
IV.EPOZ.HHN. ML:2.2 0.000694 0.28 AML other m 2020-12-06T22:38:42.85
IV.HLNI.HHE. ML:2.3 0.0005589999999999999 1.38 AML other m 2020-12-06T22:38:42.18
IV.EVRN.HNE. ML:2.5 0.00146 0.86 AML other m 2020-12-06T22:38:43.49
IV.EVRN.HHE. ML:2.5 0.001645 0.88 AML other m 2020-12-06T22:38:43.49
IV.HAGA.HHN. ML:2.5 0.0006125000000000001 1.16 AML other m 2020-12-06T22:38:44.12
IV.ENIC.HHN. ML:2.5 0.0015149999999999999 0.56 AML other m 2020-12-06T22:38:44.86
IV.HAGA.HHE. ML:2.4 0.000549 1.22 AML other m 2020-12-06T22:38:45.33
IV.MPNC.HHE. ML:2.4 0.0005635 0.42 AML other m 2020-12-06T22:38:46.45
IV.MPNC.HHN. ML:2.4 0.0005905 1.44 AML other m 2020-12-06T22:38:46.21
IV.SSY.HHN. ML:3.4 0.004144999999999999 0.2 AML other m 2020-12-06T22:38:49.77
IV.SSY.HHE. ML:3.1 0.002225 1.48 AML other m 2020-12-06T22:38:52.97
IV.HMDC.HHN. ML:2.9 0.0009105 1.62 AML other m 2020-12-06T22:38:54.81
IV.HMDC.HNN. ML:2.9 0.0008945000000000001 1.6 AML other m 2020-12-06T22:38:54.01
IV.HAVL.HHE. ML:2.8 0.000742 0.98 AML other m 2020-12-06T22:38:54.10
IV.HAVL.HHN. ML:3.0 0.0011025 1.74 AML other m 2020-12-06T22:38:54.10
IV.HMDC.HNE. ML:2.7 0.0006025000000000001 0.48 AML other m 2020-12-06T22:38:54.07
IV.HMDC.HHE. ML:2.7 0.0006435 0.5 AML other m 2020-12-06T22:38:54.06
IV.PETRA.HHE. ML:2.3 0.00028900000000000003 0.58 AML other m 2020-12-06T22:38:56.00
IV.PETRA.HHN. ML:2.2 0.00027249999999999996 0.38 AML other m 2020-12-06T22:38:57.81
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, /tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download