Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 01-01-2021 and time 21:46:09 (Italy) in region 4 km NE Ragalna (CT)

A magnitude ML 2.0 earthquake occured in region: 4 km NE Ragalna (CT), on

  • 01-01-2021 20:46:09 (UTC)
  • 01-01-2021 21:46:09 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6560, 14.9670 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
Nicolosi CT 7 7463 11387
Belpasso CT 7 28108 39495
Santa Maria di Licodia CT 8 7641 47136
Biancavilla CT 9 24007 71143
Pedara CT 9 14102 85245
Camporotondo Etneo CT 10 5023 90268
Paternò CT 10 48228 138496
San Pietro Clarenza CT 11 7743 146239
Trecastagni CT 11 10910 157149
Adrano CT 12 36122 193271
Mascalucia CT 12 31958 225229
Viagrande CT 13 8563 233792
Tremestieri Etneo CT 13 20589 254381
Zafferana Etnea CT 13 9517 263898
Gravina di Catania CT 14 25838 289736
Aci Bonaccorsi CT 14 3524 293260
San Giovanni la Punta CT 14 23060 316320
Sant'Agata li Battiati CT 15 9479 325799
Aci Sant'Antonio CT 15 17984 343783
Milo CT 15 1087 344870
Misterbianco CT 15 49410 394280
Santa Venerina CT 16 8592 402872
Motta Sant'Anastasia CT 16 12116 414988
San Gregorio di Catania CT 16 11966 426954
Valverde CT 16 7840 434794
Aci Catena CT 17 29851 464645
Acireale CT 18 52622 517267
Sant'Alfio CT 19 1582 518849
Bronte CT 19 19172 538021
Aci Castello CT 19 18723 556744
Catania CT 20 314555 871299

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Acireale (52622 inhabitants)
20 Km NW of Catania (314555 inhabitants)
72 Km NW of Siracusa (122291 inhabitants)
78 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
82 Km E of Caltanissetta (63360 inhabitants)
84 Km N of Ragusa (73313 inhabitants)
87 Km NE of Vittoria (63339 inhabitants)
90 Km N of Modica (54633 inhabitants)
91 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 2021-01-01
20:46:09		 37.656 14.9667 15 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86435901
Reviewed
Rev200 		ML 1.6 2021-01-01
20:46:08		 37.689 14.973 13 2021-02-04
16:51:31		 Sala Operativa INGV_OE (Catania) 85948041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-01 20:46:09 ± 0.09
Latitude 37.6560 ± 0.0036
Longitude 14.9667 ± 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 86435901

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 647
Semi-minor axis of confidence ellipse (meter) 548
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 88
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 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.03777
Epicentral distance of station farthest from the epicenter (degree) 0.70687
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:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 86435901
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-21 15:45:06

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85948041
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-01 20:56:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-01-01T20:46:24.01 0.6 undecidable manual S 158 44.4222 96 0.55 42
IV.MUCR.HHE. 2021-01-01T20:46:23.28 0.6 undecidable manual S 349 43.7229 97 0.01 48
IV.AIO.HHE. 2021-01-01T20:46:23.27 1.0 undecidable manual S 34 42.0246 97 0.44 22
IV.HCRL.HHZ. 2021-01-01T20:46:23.43 0.6 undecidable manual S 172 41.7249 97 0.66 41
IT.LNT.HGZ. 2021-01-01T20:46:22.99 0.6 undecidable manual S 176 40.9257 97 0.46 44
IV.HAVL.HHZ. 2021-01-01T20:46:22.42 0.1 undecidable manual P 170 78.4659 93 -0.2 87
IV.HLNI.HHZ. 2021-01-01T20:46:21.49 0.6 undecidable manual S 194 35.1426 99 0.49 44
IV.ECTS.HHZ. 2021-01-01T20:46:19.55 0.6 undecidable manual S 28 28.4493 102 0.28 46
IV.MSFR.HHZ. 2021-01-01T20:46:19.39 0.3 undecidable manual P 322 53.3022 95 0.64 62
IV.SSY.HHZ. 2021-01-01T20:46:19.20 0.1 undecidable manual P 170 56.0994 95 0.02 94
IV.MPNC.HHN. 2021-01-01T20:46:19.78 0.3 undecidable manual P 32 64.0914 94 -0.63 60
IV.HAGA.HHZ. 2021-01-01T20:46:17.19 0.3 undecidable manual P 158 44.4222 96 -0.2 70
IV.EMSG.HHZ. 2021-01-01T20:46:17.19 0.6 undecidable manual S 355 18.3705 115 0.5 45
IV.MUCR.HHE. 2021-01-01T20:46:17.26 0.6 undecidable manual P 349 43.7229 97 -0.03 48
IV.EPZF.HHZ. 2021-01-01T20:46:17.93 0.6 undecidable manual S 333 20.9679 110 0.59 44
IV.HCRL.HHZ. 2021-01-01T20:46:16.89 0.1 undecidable manual P 172 41.7249 97 -0.1 95
IV.GALF.HHZ. 2021-01-01T20:46:16.42 0.1 undecidable manual P 280 35.6421 99 0.37 92
IT.LNT.HGZ. 2021-01-01T20:46:16.60 0.3 undecidable manual P 176 40.9257 97 -0.26 69
IV.AIO.HHE. 2021-01-01T20:46:16.74 0.3 undecidable manual P 34 42.0246 97 -0.29 69
IV.HLNI.HHZ. 2021-01-01T20:46:15.62 0.1 positive manual P 194 35.1426 99 -0.36 91
IV.ECHR.HHE. 2021-01-01T20:46:14.56 1.0 undecidable manual S 305 5.7942 153 0.33 24
IV.ECTS.HHZ. 2021-01-01T20:46:14.65 0.3 undecidable manual P 28 28.4493 102 -0.32 70
IV.EPOZ.HHZ. 2021-01-01T20:46:14.14 0.3 undecidable manual P 85 19.5693 113 0.49 67
IV.ESML.HHZ. 2021-01-01T20:46:14.12 0.6 undecidable manual S 241 8.7801 142 -0.54 45
IV.ENIC.HHZ. 2021-01-01T20:46:14.35 0.6 undecidable manual S 120 5.5944 155 0.14 49
IV.EPZF.HHZ. 2021-01-01T20:46:13.62 0.3 undecidable manual P 333 20.9679 110 -0.24 71
IV.ESLN.HHZ. 2021-01-01T20:46:13.88 0.6 undecidable manual S 9 4.1958 160 -0.19 50
IV.EPIT.HHN. 2021-01-01T20:46:13.36 0.3 undecidable manual P 25 18.9699 114 -0.21 73
IV.EMSG.HHZ. 2021-01-01T20:46:13.33 0.1 undecidable manual P 355 18.3705 115 -0.15 98
IV.ENIC.HHZ. 2021-01-01T20:46:12.16 0.1 positive manual P 120 5.5944 155 0.11 100
IV.ECHR.HHE. 2021-01-01T20:46:12.19 0.3 undecidable manual P 305 5.7942 153 0.12 75
IV.ESML.HHZ. 2021-01-01T20:46:11.91 0.1 negative manual P 241 8.7801 142 -0.4 94
IV.ESLN.HHZ. 2021-01-01T20:46:11.73 0.1 positive manual P 9 4.1958 160 -0.24 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:1.7 0.000193 1.3 AML other m 2021-01-01T20:46:21.94
IV.HLNI.HHE. ML:1.7 0.00017299999999999998 0.74 AML other m 2021-01-01T20:46:22.37
IV.HCRL.HHE. ML:2.1 0.00043149999999999997 1.16 AML other m 2021-01-01T20:46:24.99
IV.HCRL.HHN. ML:2.0 0.0002895 0.64 AML other m 2021-01-01T20:46:24.61
IV.SSY.HHE. ML:2.4 0.0005480000000000001 0.9 AML other m 2021-01-01T20:46:31.01
IV.SSY.HHN. ML:2.7 0.0010785 0.96 AML other m 2021-01-01T20:46:31.26
IV.HAVL.HHN. ML:2.4 0.0003265 0.66 AML other m 2021-01-01T20:46:35.41
IV.HAVL.HHE. ML:2.3 0.0003025 0.58 AML other m 2021-01-01T20:46:35.39
IV.ESLN.HHN. ML:1.7 0.0006858111 0.4992 AML other m 2021-01-01T20:46:18.07
IV.ESLN.HHE. ML:1.9 0.0010296132999999999 0.512 AML other m 2021-01-01T20:46:14.27
IV.ESML.HHN. ML:1.5 0.0003328382 0.3072 AML other m 2021-01-01T20:46:15.33
IV.ESML.HHE. ML:1.6 0.00039364305 0.32 AML other m 2021-01-01T20:46:19.44
IV.ENIC.HHN. ML:2.0 0.00120082035 0.2432 AML other m 2021-01-01T20:46:15.81
IV.ENIC.HNN. ML:2.1 0.00158107975 0.2816 AML other m 2021-01-01T20:46:15.33
IV.ENIC.HHE. ML:1.9 0.00098890915 0.1792 AML other m 2021-01-01T20:46:17.18
IV.ENIC.HNE. ML:2.0 0.001268552 0.1664 AML other m 2021-01-01T20:46:17.10
IV.EMSG.HHE. ML:2.0 0.0006929669 0.2176 AML other m 2021-01-01T20:46:17.52
IV.EMSG.HHN. ML:2.1 0.0008014569000000001 0.448 AML other m 2021-01-01T20:46:23.35
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