Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 31-12-2020 and time 20:47:39 (UTC) in region 4 km N Ragalna (CT)

A magnitude ML 2.2 earthquake occured in region: 4 km N Ragalna (CT), on

  • 31-12-2020 20:47:39 (UTC)
  • 31-12-2020 21:47:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6660, 14.9450 at 15 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 4 3924 3924
Biancavilla CT 7 24007 27931
Santa Maria di Licodia CT 7 7641 35572
Belpasso CT 9 28108 63680
Nicolosi CT 9 7463 71143
Adrano CT 10 36122 107265
Paternò CT 11 48228 155493
Pedara CT 12 14102 169595
Camporotondo Etneo CT 12 5023 174618
San Pietro Clarenza CT 13 7743 182361
Trecastagni CT 13 10910 193271
Mascalucia CT 14 31958 225229
Zafferana Etnea CT 14 9517 234746
Viagrande CT 15 8563 243309
Tremestieri Etneo CT 15 20589 263898
Gravina di Catania CT 16 25838 289736
Aci Bonaccorsi CT 16 3524 293260
Milo CT 16 1087 294347
San Giovanni la Punta CT 17 23060 317407
Bronte CT 17 19172 336579
Sant'Agata li Battiati CT 17 9479 346058
Misterbianco CT 17 49410 395468
Motta Sant'Anastasia CT 17 12116 407584
Aci Sant'Antonio CT 17 17984 425568
Santa Venerina CT 17 8592 434160
San Gregorio di Catania CT 18 11966 446126
Valverde CT 19 7840 453966
Centuripe EN 19 5470 459436
Aci Catena CT 19 29851 489287
Maletto CT 20 3920 493207
Sant'Alfio CT 20 1582 494789

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Acireale (52622 inhabitants)
22 Km NW of Catania (314555 inhabitants)
74 Km NW of Siracusa (122291 inhabitants)
79 Km SW of Reggio di Calabria (183035 inhabitants)
80 Km SW of Messina (238439 inhabitants)
80 Km E of Caltanissetta (63360 inhabitants)
85 Km N of Ragusa (73313 inhabitants)
87 Km NE of Vittoria (63339 inhabitants)
91 Km NE of Gela (75827 inhabitants)
91 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
20:47:39		 37.6665 14.945 15 2021-02-26
14:56:20		 Bollettino Sismico Italiano INGV 87500061
Reviewed
Rev200 		ML 1.9 2020-12-31
20:47:38		 37.666 14.959 13 2021-02-26
10:37:31		 Sala Operativa INGV_OE (Catania) 85923871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-31 20:47:39 ± 0.09
Latitude 37.6665 ± 0.0036
Longitude 14.9450 ± 0.0091
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87500061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 703
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 282
Circular confidence region, given by single value of horizontal uncertainty (meter) 700.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 52
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.03238
Epicentral distance of station farthest from the epicenter (degree) 0.96048
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 87500061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-26 10:37:11

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85923871
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-12-31 22:52:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2020-12-31T20:48:03.66 0.3 undecidable manual S 169 79.9644 93 0.61 58
IV.SSY.HHZ. 2020-12-31T20:47:58.00 0.6 undecidable manual S 169 57.5979 95 0.92 35
IV.HPAC.HHZ. 2020-12-31T20:47:56.92 0.3 undecidable manual P 176 106.6155 92 -0.15 61
IV.HAGA.HHZ. 2020-12-31T20:47:54.41 0.6 undecidable manual S 156 46.2204 97 0.35 44
IV.HCRL.HHZ. 2020-12-31T20:47:53.74 0.6 undecidable manual S 170 43.2234 97 0.47 43
IV.HAVL.HHZ. 2020-12-31T20:47:52.78 0.1 undecidable manual P 169 79.9644 93 -0.19 85
IV.HLNI.HHZ. 2020-12-31T20:47:51.43 0.6 undecidable manual S 190 35.8419 100 0.1 47
IV.SSY.HHZ. 2020-12-31T20:47:49.45 0.1 undecidable manual P 169 57.5979 95 -0.08 90
IV.ECTS.HHZ. 2020-12-31T20:47:49.95 0.6 undecidable manual S 33 28.4493 104 0.56 42
IV.EPOZ.HHZ. 2020-12-31T20:47:49.06 0.6 undecidable manual S 88 21.3675 112 1.47 29
IV.AIO.HHZ. 2020-12-31T20:47:47.13 0.3 undecidable manual P 37 42.2244 98 -0.04 71
IV.MUCR.HHZ. 2020-12-31T20:47:47.21 0.3 undecidable manual P 352 42.2244 98 0.03 70
IV.HAGA.HHZ. 2020-12-31T20:47:47.39 0.3 undecidable manual P 156 46.2204 97 -0.39 65
IV.EPZF.HHZ. 2020-12-31T20:47:47.41 0.6 undecidable manual S 336 19.0698 115 0.37 45
IV.EMCN.HHZ. 2020-12-31T20:47:46.04 0.6 undecidable manual S 29 15.873 122 -0.24 47
IV.HCRL.HHZ. 2020-12-31T20:47:46.96 0.1 undecidable manual P 170 43.2234 97 -0.37 87
IV.EMSG.HHZ. 2020-12-31T20:47:46.85 0.6 undecidable manual S 1 17.1717 119 0.29 46
IV.GALF.HHZ. 2020-12-31T20:47:46.54 0.3 undecidable manual P 279 33.5442 101 0.68 59
IV.ECBD.HHN. 2020-12-31T20:47:46.41 0.6 undecidable manual S 45 17.6712 118 -0.29 46
IV.HLNI.HHZ. 2020-12-31T20:47:45.86 0.1 undecidable manual P 190 35.8419 100 -0.35 89
IV.ECHR.HHE. 2020-12-31T20:47:44.71 0.6 undecidable manual S 308 3.5964 164 0.46 46
IV.ESLN.HHZ. 2020-12-31T20:47:44.46 0.6 undecidable manual S 41 3.996 162 0.19 49
IV.ESML.HHZ. 2020-12-31T20:47:44.85 0.6 undecidable manual S 227 7.881 146 0.12 49
IV.ECTS.HHZ. 2020-12-31T20:47:44.75 0.3 undecidable manual P 33 28.4493 104 -0.34 68
IV.ENIC.HHZ. 2020-12-31T20:47:44.48 0.6 undecidable manual S 120 7.7811 147 -0.24 47
IV.EPOZ.HHZ. 2020-12-31T20:47:44.37 0.1 undecidable manual P 88 21.3675 112 0.31 92
IV.EMSG.HHZ. 2020-12-31T20:47:43.53 0.1 negative manual P 1 17.1717 119 0.07 97
IV.EVRN.HHZ. 2020-12-31T20:47:43.07 0.6 undecidable manual P 81 16.9719 120 -0.36 46
IV.ECBD.HHN. 2020-12-31T20:47:43.11 0.1 undecidable manual P 45 17.6712 118 -0.43 90
IV.EPZF.HHZ. 2020-12-31T20:47:43.76 0.1 undecidable manual P 336 19.0698 115 0.03 97
IV.EPIT.HHN. 2020-12-31T20:47:43.72 0.3 undecidable manual P 31 18.7701 116 0.03 73
IV.EMCN.HHZ. 2020-12-31T20:47:43.05 0.3 undecidable manual P 29 15.873 122 -0.24 71
IV.ESML.HHZ. 2020-12-31T20:47:42.08 0.1 negative manual P 227 7.881 146 -0.32 93
IV.ENIC.HHZ. 2020-12-31T20:47:42.42 0.1 undecidable manual P 120 7.7811 147 0.03 100
IV.ECHR.HHE. 2020-12-31T20:47:41.99 0.1 undecidable manual P 308 3.5964 164 -0.13 98
IV.ESLN.HHZ. 2020-12-31T20:47:41.97 0.1 undecidable manual P 41 3.996 162 -0.17 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHE. ML:2.4 0.00263 1.3 AML other m 2020-12-31T20:47:45.73
IV.ESML.HHN. ML:2.2 0.001815 0.68 AML other m 2020-12-31T20:47:45.59
IV.EVRN.HNN. ML:2.1 0.0009765 0.74 AML other m 2020-12-31T20:47:46.91
IV.EVRN.HHN. ML:2.1 0.0008685 0.66 AML other m 2020-12-31T20:47:46.58
IV.ENIC.HNN. ML:2.5 0.0029649999999999998 0.92 AML other m 2020-12-31T20:47:46.65
IV.ENIC.HHE. ML:2.4 0.002615 0.66 AML other m 2020-12-31T20:47:47.17
IV.ENIC.HHN. ML:2.4 0.0023150000000000002 0.32 AML other m 2020-12-31T20:47:47.17
IV.ENIC.HNE. ML:2.5 0.00307 0.94 AML other m 2020-12-31T20:47:47.56
IV.EMSG.HHN. ML:2.3 0.001495 0.7 AML other m 2020-12-31T20:47:47.99
IV.ESML.HHE. ML:2.2 0.0014849999999999998 1.06 AML other m 2020-12-31T20:47:47.31
IV.EPZF.HHE. ML:2.2 0.001114 0.6 AML other m 2020-12-31T20:47:49.81
IV.EPZF.HHN. ML:2.2 0.0010325 1.68 AML other m 2020-12-31T20:47:50.15
IV.ESLN.HHN. ML:2.3 0.00227 0.92 AML other m 2020-12-31T20:47:50.80
IV.EMCN.HHE. ML:2.5 0.0023 1.14 AML other m 2020-12-31T20:47:51.02
IV.EMCN.HHN. ML:2.6 0.003085 1.38 AML other m 2020-12-31T20:47:51.02
IV.EMCN.HNN. ML:2.6 0.00311 1.4 AML other m 2020-12-31T20:47:51.02
IV.EVRN.HHE. ML:2.0 0.0007215 1.38 AML other m 2020-12-31T20:47:51.19
IV.EVRN.HNE. ML:2.0 0.0007585 1.38 AML other m 2020-12-31T20:47:51.20
IV.HLNI.HHE. ML:1.8 0.0002605 1.02 AML other m 2020-12-31T20:47:51.98
IV.EMSG.HHE. ML:2.4 0.00177 0.76 AML other m 2020-12-31T20:47:52.47
IV.EMCN.HNE. ML:2.5 0.002475 0.92 AML other m 2020-12-31T20:47:52.30
IV.HLNI.HHN. ML:1.8 0.000209 0.3 AML other m 2020-12-31T20:47:53.47
IV.HAGA.HHE. ML:2.1 0.0003375 0.42 AML other m 2020-12-31T20:47:54.94
IV.MUCR.HHE. ML:2.0 0.00028849999999999997 0.84 AML other m 2020-12-31T20:47:55.47
IV.AIO.HHN. ML:1.6 0.00011649999999999999 1.44 AML other m 2020-12-31T20:47:55.92
IV.MUCR.HHN. ML:1.8 0.000217 0.8 AML other m 2020-12-31T20:47:55.00
IV.HCRL.HHE. ML:2.1 0.00034950000000000004 0.72 AML other m 2020-12-31T20:47:55.99
IV.HCRL.HHN. ML:2.0 0.00029099999999999997 1.3 AML other m 2020-12-31T20:47:55.74
IV.AIO.HHE. ML:1.6 0.000123 0.34 AML other m 2020-12-31T20:47:56.79
IV.GALF.HHN. ML:2.4 0.0009274999999999999 0.82 AML other m 2020-12-31T20:47:57.95
IV.SSY.HHE. ML:2.6 0.0009670000000000001 1.18 AML other m 2020-12-31T20:47:58.30
IV.HAGA.HHN. ML:1.8 0.000176 0.62 AML other m 2020-12-31T20:48:00.05
IV.SSY.HHN. ML:2.8 0.00126 0.88 AML other m 2020-12-31T20:48:00.43
IV.GALF.HHE. ML:2.3 0.0008489999999999999 1.5 AML other m 2020-12-31T20:48:02.80
IV.HAVL.HHE. ML:2.4 0.0003775 0.38 AML other m 2020-12-31T20:48:04.82
IV.HAVL.HHN. ML:2.5 0.00044 1.24 AML other m 2020-12-31T20:48:05.74
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