Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 31-12-2020 and time 20:01:48 (UTC) in region 5 km NE Ragalna (CT)

A magnitude ML 2.2 earthquake occured in region: 5 km NE Ragalna (CT), on

  • 31-12-2020 20:01:48 (UTC)
  • 31-12-2020 21:01:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6700, 14.9590 at 16 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 5 3924 3924
Biancavilla CT 8 24007 27931
Nicolosi CT 9 7463 35394
Santa Maria di Licodia CT 9 7641 43035
Belpasso CT 9 28108 71143
Pedara CT 11 14102 85245
Adrano CT 11 36122 121367
Paternò CT 11 48228 169595
Camporotondo Etneo CT 12 5023 174618
Trecastagni CT 12 10910 185528
San Pietro Clarenza CT 12 7743 193271
Zafferana Etnea CT 13 9517 202788
Mascalucia CT 14 31958 234746
Viagrande CT 14 8563 243309
Tremestieri Etneo CT 14 20589 263898
Gravina di Catania CT 15 25838 289736
Milo CT 15 1087 290823
Aci Bonaccorsi CT 15 3524 294347
San Giovanni la Punta CT 16 23060 317407
Santa Venerina CT 16 8592 325999
Sant'Agata li Battiati CT 16 9479 335478
Aci Sant'Antonio CT 16 17984 353462
Misterbianco CT 17 49410 402872
Bronte CT 17 19172 422044
Motta Sant'Anastasia CT 17 12116 434160
San Gregorio di Catania CT 18 11966 446126
Valverde CT 18 7840 453966
Aci Catena CT 18 29851 483817
Sant'Alfio CT 18 1582 485399
Acireale CT 19 52622 538021
Maletto CT 20 3920 541941
Centuripe EN 20 5470 547411

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Acireale (52622 inhabitants)
22 Km NW of Catania (314555 inhabitants)
74 Km NW of Siracusa (122291 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
81 Km E of Caltanissetta (63360 inhabitants)
85 Km N of Ragusa (73313 inhabitants)
88 Km NE of Vittoria (63339 inhabitants)
92 Km NE of Gela (75827 inhabitants)
92 Km N of Modica (54633 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 2.2 2020-12-31
20:01:48		 37.6697 14.959 17 2021-02-26
14:56:20		 Bollettino Sismico Italiano INGV 87481331
Reviewed
Rev200 		ML 1.7 2020-12-31
20:01:48		 37.679 14.95 9 2021-02-25
17:36:57		 Sala Operativa INGV_OE (Catania) 85928271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-31 20:01:48 ± 0.11
Latitude 37.6697 ± 0.0045
Longitude 14.9590 ± 0.0114
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87481331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 908
Semi-minor axis of confidence ellipse (meter) 363
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 281
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
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) 0.02698
Epicentral distance of station farthest from the epicenter (degree) 0.72395
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 87481331
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-25 17:35:44

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85928271
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-01 00:56:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2020-12-31T20:02:12.74 0.6 undecidable manual S 170 80.0643 95 0.83 36
IV.SSY.HHZ. 2020-12-31T20:02:06.80 0.3 undecidable manual S 170 57.6978 97 0.83 56
IV.HCRL.HHZ. 2020-12-31T20:02:02.60 0.6 undecidable manual S 171 43.4232 100 0.42 45
IV.HMDC.HHZ. 2020-12-31T20:02:01.76 0.3 undecidable manual P 191 80.364 95 -0.1 66
IV.HAVL.HHZ. 2020-12-31T20:02:01.61 0.3 undecidable manual P 170 80.0643 95 -0.21 65
IV.RAFF.HHZ. 2020-12-31T20:02:00.48 0.3 undecidable manual P 227 72.2721 95 -0.14 66
IV.HLNI.HHZ. 2020-12-31T20:02:00.40 0.6 undecidable manual S 192 36.4413 103 0.03 49
IV.SSY.HHZ. 2020-12-31T20:01:58.29 0.3 undecidable manual P 170 57.6978 97 -0.09 69
IV.EMSG.HHZ. 2020-12-31T20:01:56.10 0.6 undecidable manual S 357 16.7721 125 0.6 44
IV.MUCR.HHZ. 2020-12-31T20:01:56.11 0.3 undecidable manual P 350 42.0246 100 0.11 71
IV.AIO.HHZ. 2020-12-31T20:01:56.24 0.3 undecidable manual P 36 41.1255 101 0.38 67
IV.HCRL.HHZ. 2020-12-31T20:01:55.91 0.1 undecidable manual P 171 43.4232 100 -0.29 90
IV.GALF.HHZ. 2020-12-31T20:01:55.34 0.1 undecidable manual P 278 34.743 104 0.44 90
IV.EMCN.HHZ. 2020-12-31T20:01:55.20 0.6 undecidable manual S 26 14.9739 129 0.09 50
IV.ECHR.HHE. 2020-12-31T20:01:54.00 0.6 undecidable manual S 294 4.4955 162 0.51 47
IV.ECBD.HHN. 2020-12-31T20:01:54.60 0.6 undecidable manual S 42 16.5723 125 -0.86 40
IV.ENIC.HNZ. 2020-12-31T20:01:54.30 0.6 undecidable manual S 128 6.993 153 0.55 46
IV.ECTS.HHZ. 2020-12-31T20:01:54.20 0.3 undecidable manual P 31 27.4503 109 0.38 68
IV.HLNI.HHZ. 2020-12-31T20:01:54.55 0.3 undecidable manual P 192 36.4413 103 -0.61 63
IV.ESLN.HHZ. 2020-12-31T20:01:53.30 0.6 undecidable manual S 27 2.997 168 -0.09 51
IV.ECBD.HHN. 2020-12-31T20:01:52.01 0.1 undecidable manual P 42 16.5723 125 -0.31 95
IV.EPZF.HHZ. 2020-12-31T20:01:52.71 0.1 undecidable manual P 332 19.2696 120 0.04 100
IV.EPIT.HHN. 2020-12-31T20:01:52.63 0.1 undecidable manual P 29 17.871 123 0.15 98
IV.EMSG.HHZ. 2020-12-31T20:01:52.42 0.1 undecidable manual P 357 16.7721 125 0.08 99
IV.EVRN.HNN. 2020-12-31T20:01:52.04 0.3 undecidable manual P 82 15.6732 127 -0.16 74
IV.ENIC.HNZ. 2020-12-31T20:01:51.39 0.3 undecidable manual P 128 6.993 153 0.06 76
IV.EMCN.HHZ. 2020-12-31T20:01:51.96 0.3 undecidable manual P 26 14.9739 129 -0.16 74
IV.ESML.HHZ. 2020-12-31T20:01:50.89 0.1 negative manual P 231 9.0798 146 -0.6 87
IV.ECHR.HHE. 2020-12-31T20:01:50.86 0.1 undecidable manual P 294 4.4955 162 -0.32 96
IV.ESLN.HHZ. 2020-12-31T20:01:50.92 0.1 undecidable manual P 27 2.997 168 -0.2 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHN. ML:0.0 0.001555 0.32 AML other m 2020-12-31T20:01:53.71
IV.ESML.HHE. ML:0.0 0.0010234999999999999 0.64 AML other m 2020-12-31T20:01:54.42
IV.ESML.HHN. ML:0.0 0.0008035 0.22 AML other m 2020-12-31T20:01:56.00
IV.ENIC.HNE. ML:0.0 0.002315 0.72 AML other m 2020-12-31T20:01:56.45
IV.ENIC.HHE. ML:0.0 0.0020949999999999996 0.28 AML other m 2020-12-31T20:01:56.09
IV.ESLN.HHE. ML:0.0 0.0016099999999999999 0.66 AML other m 2020-12-31T20:01:56.73
IV.EMSG.HHN. ML:0.0 0.0014449999999999999 1.52 AML other m 2020-12-31T20:01:57.89
IV.ENIC.HHN. ML:0.0 0.00217 0.2 AML other m 2020-12-31T20:01:58.47
IV.EPZF.HHN. ML:0.0 0.0010035 0.38 AML other m 2020-12-31T20:01:58.51
IV.EMSG.HHE. ML:0.0 0.001165 0.86 AML other m 2020-12-31T20:01:59.66
IV.EPZF.HHE. ML:0.0 0.0006445000000000001 0.7 AML other m 2020-12-31T20:01:59.67
IV.ENIC.HNN. ML:0.0 0.002445 0.96 AML other m 2020-12-31T20:01:59.36
IV.HLNI.HHE. ML:0.0 0.0003795 0.92 AML other m 2020-12-31T20:02:01.72
IV.HLNI.HHN. ML:0.0 0.000241 0.12 AML other m 2020-12-31T20:02:02.51
IV.MUCR.HHE. ML:0.0 0.000261 0.42 AML other m 2020-12-31T20:02:03.86
IV.MUCR.HHN. ML:2.3 0.0006554999999999999 0.9 AML other m 2020-12-31T20:02:16.20
IV.HCRL.HHE. ML:0.0 0.0004240189 0.128 AML other m 2020-12-31T20:02:16.82
IV.HCRL.HHN. ML:0.0 0.00031584085000000003 0.0768 AML other m 2020-12-31T20:02:16.21
IV.AIO.HHE. ML:2.2 0.0005935 0.92 AML other m 2020-12-31T20:02:17.37
IV.AIO.HHN. ML:2.4 0.000761 0.32 AML other m 2020-12-31T20:02:17.88
IV.SSY.HHE. ML:0.0 0.0011899999999999999 1.68 AML other m 2020-12-31T20:02:07.12
IV.SSY.HHN. ML:0.0 0.00221 0.52 AML other m 2020-12-31T20:02:10.05
IV.HAVL.HHN. ML:0.0 0.00040585865 0.2944 AML other m 2020-12-31T20:02:13.00
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download