Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 31-12-2020 and time 21:54:43 (Italy) in region 6 km NE Ragalna (CT)

A magnitude ML 2.0 earthquake occured in region: 6 km NE Ragalna (CT), on

  • 31-12-2020 20:54:43 (UTC)
  • 31-12-2020 21:54:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6780, 14.9650 at 17 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 6 3924 3924
Nicolosi CT 9 7463 11387
Biancavilla CT 9 24007 35394
Belpasso CT 10 28108 63502
Santa Maria di Licodia CT 10 7641 71143
Pedara CT 11 14102 85245
Adrano CT 12 36122 121367
Trecastagni CT 12 10910 132277
Zafferana Etnea CT 12 9517 141794
Paternò CT 12 48228 190022
Camporotondo Etneo CT 13 5023 195045
San Pietro Clarenza CT 13 7743 202788
Viagrande CT 14 8563 211351
Mascalucia CT 14 31958 243309
Milo CT 14 1087 244396
Tremestieri Etneo CT 15 20589 264985
Santa Venerina CT 15 8592 273577
Aci Bonaccorsi CT 16 3524 277101
Gravina di Catania CT 16 25838 302939
San Giovanni la Punta CT 16 23060 325999
Aci Sant'Antonio CT 16 17984 343983
Sant'Agata li Battiati CT 17 9479 353462
Bronte CT 17 19172 372634
Sant'Alfio CT 18 1582 374216
Aci Catena CT 18 29851 404067
Misterbianco CT 18 49410 453477
San Gregorio di Catania CT 18 11966 465443
Valverde CT 18 7840 473283
Motta Sant'Anastasia CT 18 12116 485399
Maletto CT 19 3920 489319
Acireale CT 19 52622 541941

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km W of Acireale (52622 inhabitants)
22 Km NW of Catania (314555 inhabitants)
75 Km NW of Siracusa (122291 inhabitants)
77 Km SW of Reggio di Calabria (183035 inhabitants)
77 Km SW of Messina (238439 inhabitants)
82 Km E of Caltanissetta (63360 inhabitants)
86 Km N of Ragusa (73313 inhabitants)
89 Km NE of Vittoria (63339 inhabitants)
93 Km N of Modica (54633 inhabitants)
93 Km NE of Gela (75827 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 2.0 2020-12-31
20:54:43		 37.6783 14.9647 17 2021-02-26
14:56:20		 Bollettino Sismico Italiano INGV 87500531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-31 20:54:43 ± 0.17
Latitude 37.6783 ± 0.0072
Longitude 14.9647 ± 0.0193
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 87500531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1543
Semi-minor axis of confidence ellipse (meter) 776
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) 1540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.01709
Epicentral distance of station farthest from the epicenter (degree) 0.72935
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 87500531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-26 10:44:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2020-12-31T20:55:08.51 0.6 undecidable manual S 170 80.9523 95 0.65 50
IV.SSY.HHZ. 2020-12-31T20:55:02.59 0.6 undecidable manual S 171 58.497 97 0.67 52
IV.HCRL.HHN. 2020-12-31T20:54:58.40 0.6 undecidable manual S 172 44.2224 101 0.25 60
IV.HAVL.HHZ. 2020-12-31T20:54:57.45 0.3 undecidable manual P 170 80.9523 95 -0.21 86
IV.HLNI.HHZ. 2020-12-31T20:54:56.49 0.6 undecidable manual S 193 37.4292 103 0.11 63
IV.SSY.HHZ. 2020-12-31T20:54:54.18 0.3 undecidable manual P 171 58.497 97 -0.05 93
IV.GALF.HNZ. 2020-12-31T20:54:51.28 0.6 undecidable manual P 276 35.1426 105 0.59 55
IV.HCRL.HHN. 2020-12-31T20:54:51.71 0.3 undecidable manual P 172 44.2224 101 -0.35 89
IV.HLNI.HHZ. 2020-12-31T20:54:50.75 0.3 undecidable manual P 193 37.4292 103 -0.29 92
IV.ESML.HHZ. 2020-12-31T20:54:50.00 0.6 undecidable manual S 228 10.0788 144 -0.02 67
IV.ESLN.HHZ. 2020-12-31T20:54:49.19 0.6 undecidable manual S 27 1.8981 173 -0.01 68
IV.ECHR.HNZ. 2020-12-31T20:54:49.91 0.6 undecidable manual S 281 4.5954 162 0.55 60
IV.ECBD.HHZ. 2020-12-31T20:54:48.06 0.3 undecidable manual P 43 15.5733 129 0.11 98
IV.EPZF.HHZ. 2020-12-31T20:54:48.53 0.3 undecidable manual P 330 18.7701 123 0.18 96
IV.EPIT.HHZ. 2020-12-31T20:54:48.24 0.3 undecidable manual P 29 16.7721 126 0.14 97
IV.EMSG.HHZ. 2020-12-31T20:54:48.16 0.3 undecidable manual P 355 15.873 128 0.17 97
IV.ENIC.HHZ. 2020-12-31T20:54:47.04 0.3 undecidable manual P 136 7.1928 153 -0.09 100
IV.ESLN.HHZ. 2020-12-31T20:54:46.63 0.3 undecidable manual P 27 1.8981 173 -0.25 98
IV.ECHR.HNZ. 2020-12-31T20:54:46.60 0.3 undecidable manual P 281 4.5954 162 -0.38 95
IV.ESML.HHZ. 2020-12-31T20:54:46.72 0.3 undecidable manual P 228 10.0788 144 -0.64 87
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHE. ML:1.7 0.00040300000000000004 1.32 AML other m 2020-12-31T20:54:53.92
IV.ESML.HHN. ML:1.6 0.000339 0.84 AML other m 2020-12-31T20:54:54.14
IV.ENIC.HHN. ML:1.9 0.0007335 0.42 AML other m 2020-12-31T20:54:57.58
IV.ENIC.HHE. ML:1.9 0.000769 0.22 AML other m 2020-12-31T20:54:59.02
IV.SSY.HHN. ML:2.3 0.0004385 1.12 AML other m 2020-12-31T20:55:07.73
IV.SSY.HHE. ML:2.1 0.000261 1.46 AML other m 2020-12-31T20:55:07.08
IV.HAVL.HHN. ML:2.2 0.00021050000000000002 0.74 AML other m 2020-12-31T20:55:12.46
IV.HAVL.HHE. ML:2.0 0.00013350000000000002 1.34 AML other m 2020-12-31T20:55:12.76
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