Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 02-01-2021 and time 08:19:27 (Italy) in region 4 km NE Trecastagni (CT)

A magnitude ML 2.3 earthquake occured in region: 4 km NE Trecastagni (CT), on

  • 02-01-2021 07:19:27 (UTC)
  • 02-01-2021 08:19:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6500, 15.1000 at 9 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
Trecastagni CT 4 10910 10910
Viagrande CT 4 8563 19473
Pedara CT 5 14102 33575
Zafferana Etnea CT 5 9517 43092
Aci Sant'Antonio CT 5 17984 61076
Santa Venerina CT 6 8592 69668
Aci Bonaccorsi CT 6 3524 73192
Aci Catena CT 6 29851 103043
Acireale CT 7 52622 155665
Nicolosi CT 7 7463 163128
San Giovanni la Punta CT 8 23060 186188
Valverde CT 8 7840 194028
Tremestieri Etneo CT 8 20589 214617
Milo CT 9 1087 215704
San Gregorio di Catania CT 9 11966 227670
Mascalucia CT 9 31958 259628
Sant'Agata li Battiati CT 10 9479 269107
Gravina di Catania CT 10 25838 294945
San Pietro Clarenza CT 11 7743 302688
Aci Castello CT 11 18723 321411
Sant'Alfio CT 11 1582 322993
Giarre CT 12 27659 350652
Camporotondo Etneo CT 12 5023 355675
Belpasso CT 13 28108 383783
Riposto CT 13 14838 398621
Ragalna CT 14 3924 402545
Mascali CT 15 14282 416827
Catania CT 16 314555 731382
Misterbianco CT 16 49410 780792
Fiumefreddo di Sicilia CT 19 9623 790415
Santa Maria di Licodia CT 19 7641 798056
Piedimonte Etneo CT 19 3963 802019
Motta Sant'Anastasia CT 19 12116 814135
Paternò CT 19 48228 862363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km NW of Acireale (52622 inhabitants)
16 Km N of Catania (314555 inhabitants)
68 Km N of Siracusa (122291 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
73 Km SW of Messina (238439 inhabitants)
87 Km NE of Ragusa (73313 inhabitants)
92 Km NE of Vittoria (63339 inhabitants)
93 Km NE of Modica (54633 inhabitants)
93 Km E of Caltanissetta (63360 inhabitants)
99 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 2.3 2021-01-02
07:19:27		 37.6495 15.1 9 2021-07-12
16:54:55		 Bollettino Sismico Italiano INGV 86218441
Reviewed
Rev200 		ML 1.6 2021-01-02
07:19:26		 37.662 15.075 5 2021-02-04
17:48:27		 Sala Operativa INGV_OE (Catania) 85961181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-02 07:19:27 ± 0.09
Latitude 37.6495 ± 0.0063
Longitude 15.1000 ± 0.0068
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86218441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 605
Semi-minor axis of confidence ellipse (meter) 584
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.04856
Epicentral distance of station farthest from the epicenter (degree) 0.73475
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86218441
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-04 17:47:43

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85961181
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-02 07:30:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HCRL.HHZ. 2021-01-02T07:19:41.20 0.3 undecidable manual S 188 41.0256 50 0.22 69
IV.HMDC.HHZ. 2021-01-02T07:19:41.44 0.3 undecidable manual P 200 81.5517 50 0.07 66
IV.HAGA.HHZ. 2021-01-02T07:19:34.71 0.1 undecidable manual P 173 40.7259 50 -0.37 91
IV.AIO.HHE. 2021-01-02T07:19:34.92 0.3 undecidable manual P 18 37.5291 50 0.33 67
IV.HCRL.HHZ. 2021-01-02T07:19:34.62 0.3 undecidable manual P 188 41.0256 50 -0.52 66
IV.ESML.HHZ. 2021-01-02T07:19:34.97 0.3 undecidable manual S 260 19.6692 115 0.26 72
IV.EPZF.HHZ. 2021-01-02T07:19:34.02 0.3 undecidable manual P 312 28.749 108 0.8 58
IV.EMCN.HHZ. 2021-01-02T07:19:33.84 0.3 undecidable manual S 340 16.7721 119 0.03 76
IV.ECPN.HHZ. 2021-01-02T07:19:32.99 0.3 undecidable manual S 316 14.4744 123 -0.12 74
IV.ESLN.HHZ. 2021-01-02T07:19:32.38 0.3 undecidable manual S 294 12.0768 128 -0.05 75
IV.ECTS.HHZ. 2021-01-02T07:19:32.73 0.3 undecidable manual P 4 25.8519 110 0.07 74
IV.ESML.HHZ. 2021-01-02T07:19:31.75 0.1 undecidable manual P 260 19.6692 115 0.23 97
IV.ENIC.HNZ. 2021-01-02T07:19:31.70 0.3 undecidable manual S 254 7.1928 142 0.47 71
IV.EPIT.HHN. 2021-01-02T07:19:31.60 0.3 undecidable manual P 348 18.3705 117 0.32 71
IV.ECHR.HHE. 2021-01-02T07:19:31.16 0.3 undecidable manual P 284 16.9719 119 0.14 74
IV.EPOZ.HHZ. 2021-01-02T07:19:31.99 0.3 undecidable manual S 72 8.1807 139 0.55 70
IV.EVRN.HNZ. 2021-01-02T07:19:30.80 0.3 undecidable manual S 35 5.3946 150 -0.08 76
IV.ECPN.HHZ. 2021-01-02T07:19:30.22 0.1 undecidable manual P 316 14.4744 123 -0.37 94
IV.ECBD.HHN. 2021-01-02T07:19:30.51 0.1 undecidable manual P 355 14.5743 123 -0.1 100
IV.EMCN.HHZ. 2021-01-02T07:19:30.67 0.1 undecidable manual P 340 16.7721 119 -0.33 95
IV.ENIC.HNZ. 2021-01-02T07:19:29.33 0.1 undecidable manual P 254 7.1928 142 -0.18 99
IV.EPOZ.HHZ. 2021-01-02T07:19:29.80 0.1 positive manual P 72 8.1807 139 0.17 100
IV.ESLN.HHZ. 2021-01-02T07:19:29.78 0.1 undecidable manual P 294 12.0768 128 -0.43 93
IV.EVRN.HNZ. 2021-01-02T07:19:28.91 0.1 positive manual P 35 5.3946 150 -0.4 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EVRN.HNN. ML:2.5 0.0057179514999999995 0.1504 AML other m 2021-01-02T07:19:30.95
IV.EVRN.HHN. ML:2.5 0.006404999999999999 1.86 AML other m 2021-01-02T07:19:31.95
IV.EVRN.HNE. ML:2.4 0.004025 1.66 AML other m 2021-01-02T07:19:31.09
IV.EVRN.HHE. ML:2.3 0.0035283175 0.16 AML other m 2021-01-02T07:19:31.33
IV.ENIC.HNE. ML:2.3 0.0030097945 0.1376 AML other m 2021-01-02T07:19:35.23
IV.ENIC.HHE. ML:2.3 0.003100427 0.1792 AML other m 2021-01-02T07:19:33.58
IV.EPOZ.HHN. ML:2.1 0.0018029545 0.1792 AML other m 2021-01-02T07:19:36.05
IV.EPOZ.HHE. ML:2.1 0.0016984545 0.1408 AML other m 2021-01-02T07:19:34.56
IV.ENIC.HHN. ML:2.4 0.0037800000000000004 0.2 AML other m 2021-01-02T07:19:34.29
IV.ENIC.HNN. ML:2.4 0.003942488 0.1888 AML other m 2021-01-02T07:19:34.29
IV.EMCN.HHE. ML:2.4 0.002076307 0.4 AML other m 2021-01-02T07:19:35.54
IV.EMCN.HNE. ML:2.4 0.0020608 0.3872 AML other m 2021-01-02T07:19:35.54
IV.HCRL.HHN. ML:1.7 0.00018059415 0.3392 AML other m 2021-01-02T07:19:41.74
IV.HCRL.HHE. ML:2.1 0.0004477151 0.1824 AML other m 2021-01-02T07:19:41.40
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