Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 01-01-2021 and time 14:20:26 (Italy) in region 3 km NW Ragalna (CT)

A magnitude ML 1.8 earthquake occured in region: 3 km NW Ragalna (CT), on

  • 01-01-2021 13:20:26 (UTC)
  • 01-01-2021 14:20:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6520, 14.9140 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 3 3924 3924
Biancavilla CT 4 24007 27931
Santa Maria di Licodia CT 5 7641 35572
Adrano CT 7 36122 71694
Paternò CT 8 48228 119922
Belpasso CT 9 28108 148030
Nicolosi CT 11 7463 155493
Camporotondo Etneo CT 12 5023 160516
San Pietro Clarenza CT 13 7743 168259
Pedara CT 14 14102 182361
Mascalucia CT 15 31958 214319
Trecastagni CT 15 10910 225229
Centuripe EN 16 5470 230699
Tremestieri Etneo CT 16 20589 251288
Motta Sant'Anastasia CT 16 12116 263404
Gravina di Catania CT 17 25838 289242
Bronte CT 17 19172 308414
Misterbianco CT 17 49410 357824
Viagrande CT 17 8563 366387
Zafferana Etnea CT 17 9517 375904
San Giovanni la Punta CT 18 23060 398964
Sant'Agata li Battiati CT 18 9479 408443
Aci Bonaccorsi CT 18 3524 411967
Aci Sant'Antonio CT 19 17984 429951
Milo CT 20 1087 431038
San Gregorio di Catania CT 20 11966 443004

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of Catania (314555 inhabitants)
23 Km W of Acireale (52622 inhabitants)
74 Km NW of Siracusa (122291 inhabitants)
77 Km E of Caltanissetta (63360 inhabitants)
82 Km SW of Reggio di Calabria (183035 inhabitants)
82 Km N of Ragusa (73313 inhabitants)
83 Km SW of Messina (238439 inhabitants)
85 Km NE of Vittoria (63339 inhabitants)
88 Km NE of Gela (75827 inhabitants)
89 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 1.8 2021-01-01
13:20:26		 37.6523 14.9137 18 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86398471
Reviewed
Rev200 		ML 1.6 2021-01-01
13:20:27		 37.676 14.953 11 2021-02-04
16:48:33		 Sala Operativa INGV_OE (Catania) 85941601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-01 13:20:26 ± 0.07
Latitude 37.6523 ± 0.0036
Longitude 14.9137 ± 0.0068
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 86398471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 575
Semi-minor axis of confidence ellipse (meter) 288
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
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) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.71226
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 86398471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-20 10:50:28

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 85941601
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-01 13:34:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-01-01T13:20:40.64 0.3 undecidable manual P 166 79.0653 96 0.06 68
IV.HLNI.HHZ. 2021-01-01T13:20:39.02 0.6 undecidable manual S 186 33.9438 107 0.31 46
IV.ECTS.HHE. 2021-01-01T13:20:38.34 0.6 undecidable manual S 35 31.2465 109 0.29 47
IV.SSY.HHZ. 2021-01-01T13:20:37.25 0.6 undecidable manual P 166 56.6988 99 0.09 47
IV.HVZN.HNZ. 2021-01-01T13:20:37.45 0.6 undecidable manual P 198 55.4001 99 0.48 43
IV.MSFR.HHZ. 2021-01-01T13:20:36.40 0.6 undecidable manual P 326 50.9157 100 0.12 47
IV.HAGA.HHZ. 2021-01-01T13:20:35.37 0.3 undecidable manual P 152 45.9207 101 -0.16 70
IV.AIO.HHE. 2021-01-01T13:20:35.32 0.6 undecidable manual P 38 45.1215 102 -0.08 48
IV.HCRL.HHZ. 2021-01-01T13:20:35.04 0.1 positive manual P 166 42.3243 103 0.06 96
IV.MUCR.HHE. 2021-01-01T13:20:35.21 0.1 undecidable manual P 355 43.4232 102 0.05 96
IV.EMSG.HHZ. 2021-01-01T13:20:35.22 0.6 undecidable manual S 10 18.9699 124 0.14 49
IV.ENIC.HHN. 2021-01-01T13:20:33.69 0.6 undecidable manual S 104 9.7791 146 0.36 48
IV.ECHR.HHE. 2021-01-01T13:20:33.13 0.6 undecidable manual S 359 3.7962 166 0.45 48
IV.HLNI.HHZ. 2021-01-01T13:20:33.66 0.6 undecidable manual P 186 33.9438 107 -0.07 49
IV.ECTS.HHE. 2021-01-01T13:20:33.34 0.3 undecidable manual P 35 31.2465 109 -0.01 75
IV.ESML.HHZ. 2021-01-01T13:20:32.88 0.6 undecidable manual S 218 4.8951 162 0.12 51
IV.ESLN.HHE. 2021-01-01T13:20:32.92 0.6 undecidable manual S 50 6.993 155 -0.05 51
IV.EPOZ.HHZ. 2021-01-01T13:20:32.30 0.3 undecidable manual P 85 24.2535 116 -0.04 75
IV.EMSG.HHZ. 2021-01-01T13:20:31.49 0.1 undecidable manual P 10 18.9699 124 -0.15 99
IV.EPZF.HHN. 2021-01-01T13:20:31.91 0.3 undecidable manual P 345 19.6692 123 0.18 73
IV.ENIC.HHN. 2021-01-01T13:20:30.50 0.3 undecidable manual P 104 9.7791 146 -0.13 75
IV.ECHR.HHE. 2021-01-01T13:20:30.04 0.1 undecidable manual P 359 3.7962 166 -0.21 100
IV.ESLN.HHE. 2021-01-01T13:20:30.07 0.1 undecidable manual P 50 6.993 155 -0.35 96
IV.ESML.HHZ. 2021-01-01T13:20:29.94 0.1 negative manual P 218 4.8951 162 -0.35 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ENIC.HHE. ML:2.1 0.00105168335 0.3392 AML other m 2021-01-01T13:20:34.70
IV.ENIC.HNE. ML:2.1 0.0010573906499999999 0.3264 AML other m 2021-01-01T13:20:34.54
IV.ESML.HHE. ML:1.8 0.000557 0.18 AML other m 2021-01-01T13:20:35.84
IV.EMSG.HHN. ML:2.1 0.0007723739 0.5376 AML other m 2021-01-01T13:20:36.44
IV.ESML.HHN. ML:1.6 0.00034596554999999997 0.1984 AML other m 2021-01-01T13:20:37.34
IV.EPZF.HHN. ML:1.8 0.00033350000000000003 0.58 AML other m 2021-01-01T13:20:37.99
IV.ECTS.HHN. ML:1.6 0.000146 0.74 AML other m 2021-01-01T13:20:38.68
IV.ECTS.HHE. ML:1.5 0.0001285 1.12 AML other m 2021-01-01T13:20:39.58
IV.EPZF.HHE. ML:1.7 0.00031354365 0.3776 AML other m 2021-01-01T13:20:39.11
IV.HLNI.HHN. ML:1.6 0.000148 0.62 AML other m 2021-01-01T13:20:40.99
IV.HLNI.HHE. ML:1.7 0.000177 0.48 AML other m 2021-01-01T13:20:40.74
IV.EMSG.HHE. ML:2.1 0.0007992010499999999 0.3008 AML other m 2021-01-01T13:20:41.88
IV.HCRL.HHE. ML:1.9 0.00023500000000000002 0.46 AML other m 2021-01-01T13:20:42.44
IV.HAGA.HHE. ML:1.9 0.0002115 0.4 AML other m 2021-01-01T13:20:42.80
IV.HCRL.HHN. ML:1.9 0.00022700000000000002 1.18 AML other m 2021-01-01T13:20:43.06
IV.HAGA.HHN. ML:1.7 0.00013700000000000002 0.96 AML other m 2021-01-01T13:20:44.99
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