Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 31-12-2020 and time 22:09:44 (UTC) in region 5 km N Ragalna (CT)

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

  • 31-12-2020 22:09:44 (UTC)
  • 31-12-2020 23:09:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6750, 14.9410 at 18 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 7 24007 27931
Santa Maria di Licodia CT 8 7641 35572
Adrano CT 10 36122 71694
Belpasso CT 10 28108 99802
Nicolosi CT 10 7463 107265
Paternò CT 11 48228 155493
Pedara CT 12 14102 169595
Camporotondo Etneo CT 13 5023 174618
San Pietro Clarenza CT 14 7743 182361
Trecastagni CT 14 10910 193271
Zafferana Etnea CT 15 9517 202788
Mascalucia CT 15 31958 234746
Viagrande CT 16 8563 243309
Bronte CT 16 19172 262481
Tremestieri Etneo CT 16 20589 283070
Milo CT 16 1087 284157
Gravina di Catania CT 17 25838 309995
Aci Bonaccorsi CT 17 3524 313519
San Giovanni la Punta CT 17 23060 336579
Santa Venerina CT 18 8592 345171
Sant'Agata li Battiati CT 18 9479 354650
Misterbianco CT 18 49410 404060
Aci Sant'Antonio CT 18 17984 422044
Motta Sant'Anastasia CT 18 12116 434160
Maletto CT 19 3920 438080
Centuripe EN 19 5470 443550
San Gregorio di Catania CT 19 11966 455516
Valverde CT 19 7840 463356
Aci Catena CT 20 29851 493207
Sant'Alfio CT 20 1582 494789

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km W of Acireale (52622 inhabitants)
23 Km NW of Catania (314555 inhabitants)
75 Km NW of Siracusa (122291 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
80 Km E of Caltanissetta (63360 inhabitants)
85 Km N of Ragusa (73313 inhabitants)
88 Km NE of Vittoria (63339 inhabitants)
91 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
22:09:44		 37.6752 14.9407 18 2021-02-26
14:56:20		 Bollettino Sismico Italiano INGV 87503821
Reviewed
Rev200 		ML 1.7 2020-12-31
22:09:45		 37.687 14.954 10 2021-02-26
11:55:12		 Sala Operativa INGV_OE (Catania) 85925961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-31 22:09:44 ± 0.12
Latitude 37.6752 ± 0.0063
Longitude 14.9407 ± 0.0114
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87503821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 785
Semi-minor axis of confidence ellipse (meter) 716
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 98
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
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 32
Number of defining phases 32
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) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.72935
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:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 85925961
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-12-31 23:56:11

ML:2.2

Field Value
Value 2.2
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 87503821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-26 11:54:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2020-12-31T22:10:09.42 0.6 undecidable manual S 169 80.9523 95 0.53 39
IV.SSY.HHZ. 2020-12-31T22:10:03.66 0.6 undecidable manual S 168 58.5969 98 0.7 38
IV.HCRL.HHZ. 2020-12-31T22:09:59.48 0.6 undecidable manual S 169 44.2224 101 0.3 45
IV.HAVL.HHZ. 2020-12-31T22:09:58.36 0.1 undecidable manual P 169 80.9523 95 -0.33 85
IV.HLNI.HHZ. 2020-12-31T22:09:57.35 0.6 undecidable manual S 189 36.741 105 0.13 48
IV.RAFF.HHZ. 2020-12-31T22:09:57.43 0.3 undecidable manual P 226 71.4729 96 0.19 66
IV.EPOZ.HHZ. 2020-12-31T22:09:55.00 0.6 undecidable manual S 91 21.7671 119 1.51 27
IV.SSY.HHZ. 2020-12-31T22:09:55.04 0.1 negative manual P 168 58.5969 98 -0.22 91
IV.GALF.HHZ. 2020-12-31T22:09:52.38 0.3 undecidable manual P 277 33.0447 107 0.98 56
IV.EPIT.HHN. 2020-12-31T22:09:52.99 0.6 undecidable manual S 34 18.2706 125 0.31 48
IV.EPZF.HHZ. 2020-12-31T22:09:52.87 0.6 undecidable manual S 336 18.0708 125 0.21 49
IV.HCRL.HHZ. 2020-12-31T22:09:52.70 0.1 undecidable manual P 169 44.2224 101 -0.37 90
IV.EVRN.HNN. 2020-12-31T22:09:52.03 0.6 undecidable manual S 85 17.1717 127 -0.43 47
IV.AIO.HHZ. 2020-12-31T22:09:52.78 0.3 undecidable manual P 38 41.625 102 0.09 71
IV.MUCR.HHZ. 2020-12-31T22:09:52.80 0.3 undecidable manual P 352 41.2254 103 0.17 71
IV.HLNI.HHZ. 2020-12-31T22:09:51.46 0.1 negative manual P 189 36.741 105 -0.49 89
IV.ECBD.HHN. 2020-12-31T22:09:51.99 0.6 undecidable manual S 48 17.2716 127 -0.5 46
IV.ENIC.HHZ. 2020-12-31T22:09:51.29 0.6 undecidable manual S 124 8.5803 149 0.38 48
IV.ESLN.HHZ. 2020-12-31T22:09:50.13 0.6 undecidable manual S 56 3.5964 166 -0.27 49
IV.EFIU.HHE. 2020-12-31T22:09:50.93 0.6 undecidable manual P 62 26.8509 112 0.43 45
IV.ECHR.HHE. 2020-12-31T22:09:50.75 0.6 undecidable manual S 297 2.6973 170 0.4 49
IV.EMSG.HHZ. 2020-12-31T22:09:49.24 0.1 undecidable manual P 3 16.1727 129 0.16 99
IV.ECBD.HHN. 2020-12-31T22:09:49.13 0.1 undecidable manual P 48 17.2716 127 -0.08 100
IV.EPOZ.HHZ. 2020-12-31T22:09:49.93 0.3 undecidable manual P 91 21.7671 119 0.14 73
IV.EPIT.HHN. 2020-12-31T22:09:49.22 0.1 undecidable manual P 34 18.2706 125 -0.11 99
IV.EPZF.HHZ. 2020-12-31T22:09:49.49 0.3 undecidable manual P 336 18.0708 125 0.18 74
IV.EVRN.HNN. 2020-12-31T22:09:48.83 0.3 undecidable manual P 85 17.1717 127 -0.37 71
IV.ENIC.HHZ. 2020-12-31T22:09:48.32 0.3 undecidable manual P 124 8.5803 149 0.01 77
IV.EMCN.HHZ. 2020-12-31T22:09:48.59 0.3 undecidable manual P 32 15.2736 131 -0.37 71
IV.ESLN.HHZ. 2020-12-31T22:09:47.89 0.3 undecidable manual P 56 3.5964 166 -0.12 76
IV.ECHR.HHE. 2020-12-31T22:09:47.77 0.1 undecidable manual P 297 2.6973 170 -0.21 99
IV.ESML.HHZ. 2020-12-31T22:09:47.85 0.1 negative manual P 220 8.2806 150 -0.43 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHN. ML:2.3 0.0019050000000000002 0.3 AML other m 2020-12-31T22:09:50.32
IV.ESLN.HHE. ML:2.3 0.002045 0.34 AML other m 2020-12-31T22:09:50.30
IV.ESML.HHE. ML:2.1 0.00115 0.62 AML other m 2020-12-31T22:09:51.99
IV.ENIC.HHN. ML:2.4 0.0024649999999999997 0.52 AML other m 2020-12-31T22:09:53.80
IV.ENIC.HHE. ML:2.3 0.001895 0.18 AML other m 2020-12-31T22:09:54.09
IV.ENIC.HNE. ML:2.4 0.00242 0.2 AML other m 2020-12-31T22:09:54.01
IV.EMSG.HHN. ML:2.1 0.0009735000000000001 1.48 AML other m 2020-12-31T22:09:54.87
IV.EPZF.HHE. ML:2.2 0.0009525 0.26 AML other m 2020-12-31T22:09:54.58
IV.ESML.HHN. ML:1.9 0.0006695 1.26 AML other m 2020-12-31T22:09:54.95
IV.EPZF.HHN. ML:2.2 0.0010515 0.52 AML other m 2020-12-31T22:09:55.44
IV.ENIC.HNN. ML:2.5 0.00256 0.88 AML other m 2020-12-31T22:09:56.54
IV.HLNI.HHE. ML:1.8 0.0002175 0.7 AML other m 2020-12-31T22:09:57.22
IV.HLNI.HHN. ML:1.9 0.000279 1.84 AML other m 2020-12-31T22:09:57.05
IV.AIO.HHE. ML:1.8 0.00021450000000000004 1.24 AML other m 2020-12-31T22:10:00.06
IV.HCRL.HHE. ML:2.2 0.000482 0.48 AML other m 2020-12-31T22:10:00.31
IV.HCRL.HHN. ML:2.1 0.00034599999999999995 0.54 AML other m 2020-12-31T22:10:00.63
IV.MUCR.HHE. ML:1.6 0.000111 0.44 AML other m 2020-12-31T22:10:00.48
IV.AIO.HHN. ML:1.7 0.00014150000000000002 1.28 AML other m 2020-12-31T22:10:00.77
IV.EMSG.HHE. ML:2.2 0.0010400000000000001 1.42 AML other m 2020-12-31T22:10:01.15
IV.MUCR.HHN. ML:1.6 0.00012785000000000002 0.96 AML other m 2020-12-31T22:10:02.19
IV.GALF.HHN. ML:2.1 0.0005355 1.02 AML other m 2020-12-31T22:10:02.41
IV.SSY.HHE. ML:2.7 0.001135 0.26 AML other m 2020-12-31T22:10:03.80
IV.SSY.HHN. ML:3.0 0.002235 1.58 AML other m 2020-12-31T22:10:07.90
IV.GALF.HHE. ML:2.2 0.0006039999999999999 0.6 AML other m 2020-12-31T22:10:07.43
IV.HAVL.HHE. ML:2.6 0.0005705 0.52 AML other m 2020-12-31T22:10:10.50
IV.HAVL.HHN. ML:2.7 0.0007199999999999999 1.74 AML other m 2020-12-31T22:10:11.97
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