Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.8 on date 09-12-2020 and time 18:33:57 (Italy) in region 12 km N Ragalna (CT)

A magnitude ML 2.8 earthquake occured in region: 12 km N Ragalna (CT), on

  • 09-12-2020 17:33:57 (UTC)
  • 09-12-2020 18:33:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7320, 14.9790 at 9 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
Ragalna CT 12 3924 3924
Zafferana Etnea CT 12 9517 13441
Milo CT 12 1087 14528
Nicolosi CT 14 7463 21991
Biancavilla CT 14 24007 45998
Bronte CT 14 19172 65170
Pedara CT 15 14102 79272
Sant'Alfio CT 15 1582 80854
Maletto CT 15 3920 84774
Adrano CT 15 36122 120896
Santa Venerina CT 15 8592 129488
Santa Maria di Licodia CT 15 7641 137129
Trecastagni CT 16 10910 148039
Belpasso CT 16 28108 176147
Randazzo CT 17 10900 187047
Viagrande CT 17 8563 195610
San Pietro Clarenza CT 18 7743 203353
Giarre CT 18 27659 231012
Camporotondo Etneo CT 18 5023 236035
Paternò CT 18 48228 284263
Mascalucia CT 19 31958 316221
Aci Bonaccorsi CT 19 3524 319745
Linguaglossa CT 19 5403 325148
Aci Sant'Antonio CT 19 17984 343132
Tremestieri Etneo CT 19 20589 363721
Mascali CT 19 14282 378003
Piedimonte Etneo CT 20 3963 381966
Moio Alcantara ME 20 717 382683
Riposto CT 20 14838 397521
San Giovanni la Punta CT 20 23060 420581

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
27 Km NW of Catania (314555 inhabitants)
72 Km SW of Reggio di Calabria (183035 inhabitants)
72 Km SW of Messina (238439 inhabitants)
80 Km NW of Siracusa (122291 inhabitants)
85 Km E of Caltanissetta (63360 inhabitants)
92 Km N of Ragusa (73313 inhabitants)
95 Km NE of Vittoria (63339 inhabitants)
98 Km NE of Gela (75827 inhabitants)
99 Km N of Modica (54633 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 2.8 2020-12-09
17:33:57		 37.732 14.9788 9 2021-02-26
14:56:19		 Bollettino Sismico Italiano INGV 87263001
Reviewed
Rev200 		ML 2.4 2020-12-09
17:33:57		 37.735 14.972 5 2021-02-18
01:48:34		 Sala Operativa INGV_OE (Catania) 85320891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-09 17:33:57 ± 0.08
Latitude 37.7320 ± 0.0045
Longitude 14.9788 ± 0.0080
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87263001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 647
Semi-minor axis of confidence ellipse (meter) 471
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.01349
Epicentral distance of station farthest from the epicenter (degree) 1.12775
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85320891
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-12-09 17:47:24

ML:2.8

Field Value
Value 2.8
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 87263001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-18 01:48:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2020-12-09T17:34:24.50 0.3 undecidable manual S 172 86.6466 50 0.96 48
IV.JOPP.HHZ. 2020-12-09T17:34:19.66 0.6 undecidable manual P 39 125.1747 50 1.14 27
IV.SSY.HHZ. 2020-12-09T17:34:18.79 0.6 undecidable manual S 173 64.2912 50 1.21 30
IV.HAVL.HHZ. 2020-12-09T17:34:12.12 0.1 undecidable manual P 172 86.6466 50 -0.45 78
IV.HMDC.HHZ. 2020-12-09T17:34:12.47 0.3 undecidable manual P 191 87.4458 50 -0.24 61
IV.SSY.HHZ. 2020-12-09T17:34:08.78 0.1 undecidable manual P 173 64.2912 50 -0.35 84
IV.MPNC.HHZ. 2020-12-09T17:34:08.21 0.6 undecidable manual P 35 56.3991 50 0.29 43
IV.MSFR.HHZ. 2020-12-09T17:34:06.80 0.6 undecidable manual P 315 47.619 50 0.23 44
IV.HAGA.HHZ. 2020-12-09T17:34:06.62 0.3 undecidable manual P 163 51.9036 50 -0.61 59
IV.HLNI.HHZ. 2020-12-09T17:34:05.32 0.3 undecidable manual P 192 43.5231 50 -0.62 60
IV.GALF.HHZ. 2020-12-09T17:34:05.13 0.3 undecidable manual P 266 36.2415 50 0.31 66
IV.MUCR.HHZ. 2020-12-09T17:34:04.66 0.1 positive manual P 345 35.742 50 -0.07 93
IV.EPZF.HHZ. 2020-12-09T17:34:04.07 0.6 undecidable manual S 314 14.7741 122 0.41 45
IV.ENIC.HHZ. 2020-12-09T17:34:03.25 0.6 undecidable manual S 161 11.7771 128 0.44 45
IV.EVRN.HHZ. 2020-12-09T17:34:03.67 0.3 undecidable manual S 109 14.5743 123 0.08 72
IV.ECHR.HHE. 2020-12-09T17:34:02.22 0.6 undecidable manual S 229 7.6812 141 0.43 45
IV.EPOZ.HHZ. 2020-12-09T17:34:02.41 0.3 undecidable manual P 110 19.5693 116 0.48 66
IV.EMCN.HNZ. 2020-12-09T17:34:02.04 0.6 undecidable manual S 36 8.0808 139 0.15 48
IV.EMSG.HHZ. 2020-12-09T17:34:02.52 0.6 undecidable manual S 345 10.1787 133 0.14 48
IV.ECTS.HHZ. 2020-12-09T17:34:02.02 0.1 undecidable manual P 37 20.7681 114 -0.13 94
IV.ECPN.HHZ. 2020-12-09T17:34:01.42 0.6 undecidable manual S 27 1.4985 171 0.55 44
IV.ECBD.HHN. 2020-12-09T17:34:01.49 0.6 undecidable manual S 60 10.878 131 -1.07 35
IV.ESML.HHZ. 2020-12-09T17:34:01.22 0.3 undecidable manual P 215 15.3735 121 0.03 73
IV.ESLN.HHZ. 2020-12-09T17:34:01.18 0.6 undecidable manual S 185 4.2957 155 0.02 50
IV.EMCN.HNZ. 2020-12-09T17:34:00.01 0.1 undecidable manual P 36 8.0808 139 -0.06 98
IV.EVRN.HHZ. 2020-12-09T17:34:00.99 0.3 undecidable manual P 109 14.5743 123 -0.06 73
IV.EMSG.HHZ. 2020-12-09T17:34:00.36 0.1 positive manual P 345 10.1787 133 0 99
IV.ENIC.HHZ. 2020-12-09T17:34:00.51 0.1 undecidable manual P 161 11.7771 128 -0.09 97
IV.ECBD.HHN. 2020-12-09T17:34:00.47 0.1 undecidable manual P 60 10.878 131 0.01 98
IV.EPZF.HHZ. 2020-12-09T17:34:00.80 0.1 positive manual P 314 14.7741 122 -0.29 92
IV.EPIT.HHN. 2020-12-09T17:34:00.66 0.1 undecidable manual P 38 11.0778 130 0.16 95
IV.ECPN.HHZ. 2020-12-09T17:33:59.47 0.1 undecidable manual P 27 1.4985 171 -0.01 100
IV.ECHR.HHE. 2020-12-09T17:33:59.72 0.1 undecidable manual P 229 7.6812 141 -0.29 93
IV.ECNE.HHN. 2020-12-09T17:33:59.54 0.3 undecidable manual P 29 4.1958 156 -0.1 73
IV.ESLN.HHZ. 2020-12-09T17:33:59.47 0.1 positive manual P 185 4.2957 155 -0.18 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ENIC.HHE. ML:2.8 0.008105000000000001 0.98 AML other m 2020-12-09T17:34:03.80
IV.EMSG.HHE. ML:2.9 0.01035 0.7 AML other m 2020-12-09T17:34:03.84
IV.EMCN.HHE. ML:2.8 0.01001 0.12 AML other m 2020-12-09T17:34:03.86
IV.EMCN.HNE. ML:2.8 0.009699999999999999 0.12 AML other m 2020-12-09T17:34:03.86
IV.EMCN.HHN. ML:2.8 0.009885 0.18 AML other m 2020-12-09T17:34:04.21
IV.EMCN.HNN. ML:2.8 0.009935000000000001 0.18 AML other m 2020-12-09T17:34:04.21
IV.EMSG.HHN. ML:2.9 0.011399999999999999 1.46 AML other m 2020-12-09T17:34:04.01
IV.EVRN.HNE. ML:3.0 0.009710000000000002 0.18 AML other m 2020-12-09T17:34:05.02
IV.ENIC.HNN. ML:2.8 0.007965 1.38 AML other m 2020-12-09T17:34:05.26
IV.EVRN.HHN. ML:3.0 0.011224999999999999 1.2 AML other m 2020-12-09T17:34:05.03
IV.EVRN.HHE. ML:3.0 0.01117 0.18 AML other m 2020-12-09T17:34:05.89
IV.EVRN.HNN. ML:3.0 0.01111 0.18 AML other m 2020-12-09T17:34:05.89
IV.EPZF.HHN. ML:2.7 0.00513 0.28 AML other m 2020-12-09T17:34:05.95
IV.ENIC.HHN. ML:2.8 0.0074199999999999995 1.26 AML other m 2020-12-09T17:34:05.33
IV.ECTS.HHE. ML:2.4 0.001765 0.42 AML other m 2020-12-09T17:34:06.22
IV.ESML.HHN. ML:2.7 0.00517 1.28 AML other m 2020-12-09T17:34:06.26
IV.ESML.HHE. ML:2.8 0.00652 0.62 AML other m 2020-12-09T17:34:06.32
IV.ECTS.HHN. ML:2.4 0.0020350000000000004 0.68 AML other m 2020-12-09T17:34:07.57
IV.EPOZ.HHE. ML:2.9 0.00601 0.64 AML other m 2020-12-09T17:34:08.00
IV.EPZF.HHE. ML:2.7 0.00524 0.36 AML other m 2020-12-09T17:34:08.61
IV.EPOZ.HHN. ML:2.8 0.0053100000000000005 0.3 AML other m 2020-12-09T17:34:08.36
IV.ENIC.HNE. ML:2.9 0.008835 0.34 AML other m 2020-12-09T17:34:08.59
IV.MUCR.HHN. ML:2.3 0.0008460000000000001 0.4 AML other m 2020-12-09T17:34:14.20
IV.MUCR.HHE. ML:2.4 0.000968 0.48 AML other m 2020-12-09T17:34:14.57
IV.HLNI.HHE. ML:2.0 0.0003215 0.44 AML other m 2020-12-09T17:34:16.76
IV.HLNI.HHN. ML:2.2 0.000455 1.5 AML other m 2020-12-09T17:34:17.06
IV.GALF.HNE. ML:2.0 0.00041500000000000006 0.78 AML other m 2020-12-09T17:34:17.57
IV.GALF.HHN. ML:3.0 0.004195 0.56 AML other m 2020-12-09T17:34:17.84
IV.GALF.HNN. ML:2.1 0.000533 1.48 AML other m 2020-12-09T17:34:17.85
IV.GALF.HHE. ML:3.0 0.003715 1.58 AML other m 2020-12-09T17:34:17.16
IV.SSY.HHE. ML:3.0 0.00176 1.76 AML other m 2020-12-09T17:34:19.02
IV.MPNC.HHE. ML:2.6 0.0009099999999999999 0.42 AML other m 2020-12-09T17:34:21.21
IV.SSY.HHN. ML:3.2 0.0033099999999999996 0.48 AML other m 2020-12-09T17:34:23.45
IV.MPNC.HHN. ML:2.5 0.0007315 0.48 AML other m 2020-12-09T17:34:23.36
IV.HMDC.HHE. ML:2.6 0.000465 0.88 AML other m 2020-12-09T17:34:26.26
IV.HMDC.HNE. ML:2.6 0.0004375 0.9 AML other m 2020-12-09T17:34:26.26
IV.HAVL.HHN. ML:2.8 0.0007664999999999999 0.56 AML other m 2020-12-09T17:34:26.44
IV.HMDC.HHN. ML:2.8 0.0008715 0.7 AML other m 2020-12-09T17:34:26.56
IV.HMDC.HNN. ML:2.8 0.0007700000000000001 0.7 AML other m 2020-12-09T17:34:26.57
IV.HAVL.HHE. ML:2.8 0.0008345000000000001 0.26 AML other m 2020-12-09T17:34:27.13
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