Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 01-01-2021 and time 18:07:29 (UTC) in region 4 km NE Ragalna (CT)

A magnitude ML 1.5 earthquake occured in region: 4 km NE Ragalna (CT), on

  • 01-01-2021 18:07:29 (UTC)
  • 01-01-2021 19:07:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6580, 14.9680 at 12 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 11 5023 90268
Paternò CT 11 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
Zafferana Etnea CT 13 9517 243309
Tremestieri Etneo CT 13 20589 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
Milo CT 15 1087 326886
Aci Sant'Antonio CT 15 17984 344870
Santa Venerina CT 16 8592 353462
Misterbianco CT 16 49410 402872
San Gregorio di Catania CT 16 11966 414838
Motta Sant'Anastasia CT 16 12116 426954
Valverde CT 16 7840 434794
Aci Catena CT 17 29851 464645
Acireale CT 18 52622 517267
Sant'Alfio CT 18 1582 518849
Bronte CT 19 19172 538021
Aci Castello CT 19 18723 556744

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)
91 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 1.5 2021-01-01
18:07:29		 37.6577 14.9677 12 2021-07-12
16:54:56		 Bollettino Sismico Italiano INGV 86401451
Reviewed
Rev200 		ML 1.6 2021-01-01
18:07:28		 37.672 14.964 11 2021-02-04
16:49:32		 Sala Operativa INGV_OE (Catania) 85946051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-01 18:07:29 ± 0.09
Latitude 37.6577 ± 0.0036
Longitude 14.9677 ± 0.0080
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86401451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 668
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.03597
Epicentral distance of station farthest from the epicenter (degree) 0.70867
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:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 86401451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-20 14:20:30

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 85946051
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-01 18:51:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAGA.HHZ. 2021-01-01T18:07:44.03 0.6 undecidable manual S 158 44.5221 92 0.58 42
IV.HCRL.HHZ. 2021-01-01T18:07:43.46 0.3 undecidable manual S 172 41.9247 92 0.69 61
IV.HAVL.HHZ. 2021-01-01T18:07:42.49 0.1 undecidable manual P 170 78.6657 91 -0.16 86
IV.HLNI.HHZ. 2021-01-01T18:07:41.13 0.6 undecidable manual S 194 35.3424 93 0.13 48
IV.RAFF.HHZ. 2021-01-01T18:07:41.68 0.3 undecidable manual P 228 71.9724 91 0.07 68
IV.SSY.HHZ. 2021-01-01T18:07:39.16 0.1 undecidable manual P 170 56.1993 91 -0.04 92
IV.HVZN.HNZ. 2021-01-01T18:07:39.75 0.6 undecidable manual P 203 57.5979 91 0.34 44
IV.MSFR.HHZ. 2021-01-01T18:07:39.20 0.6 undecidable manual P 322 53.2023 91 0.47 42
IV.HAGA.HHZ. 2021-01-01T18:07:37.15 0.3 undecidable manual P 158 44.5221 92 -0.24 68
IV.EPZF.HHZ. 2021-01-01T18:07:37.52 0.6 undecidable manual S 332 20.868 97 0.37 46
IV.EMSG.HHZ. 2021-01-01T18:07:36.23 1.0 undecidable manual S 355 18.1707 101 -0.21 24
IV.AIO.HHE. 2021-01-01T18:07:36.78 0.3 undecidable manual P 34 41.8248 92 -0.2 70
IV.HCRL.HHZ. 2021-01-01T18:07:36.76 0.1 undecidable manual P 172 41.9247 92 -0.23 91
IV.GALF.HHZ. 2021-01-01T18:07:36.22 0.6 undecidable manual P 280 35.742 93 0.18 47
IV.HLNI.HHZ. 2021-01-01T18:07:35.44 0.1 positive manual P 194 35.3424 93 -0.53 85
IV.ESML.HHZ. 2021-01-01T18:07:34.09 0.6 undecidable manual S 240 8.88 132 -0.12 49
IV.ECHR.HHE. 2021-01-01T18:07:33.65 0.6 undecidable manual S 303 5.7942 147 -0.01 51
IV.EMSG.HHZ. 2021-01-01T18:07:33.27 0.1 positive manual P 355 18.1707 101 -0.07 99
IV.ESLN.HHZ. 2021-01-01T18:07:33.76 0.6 undecidable manual S 8 3.996 157 0.32 48
IV.EPZF.HHZ. 2021-01-01T18:07:33.65 0.1 undecidable manual P 332 20.868 97 -0.1 98
IV.ENIC.HHZ. 2021-01-01T18:07:33.54 0.6 undecidable manual S 122 5.5944 148 -0.09 50
IV.ENIC.HHZ. 2021-01-01T18:07:31.84 0.6 undecidable manual P 122 5.5944 148 0.12 50
IV.ESML.HHZ. 2021-01-01T18:07:31.84 0.1 negative manual P 240 8.88 132 -0.22 96
IV.ECHR.HHE. 2021-01-01T18:07:31.86 0.1 positive manual P 303 5.7942 147 0.12 100
IV.ESLN.HHZ. 2021-01-01T18:07:31.71 0.1 undecidable manual P 8 3.996 157 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ENIC.HHE. ML:1.5 0.00045329969999999997 0.2944 AML other m 2021-01-01T18:07:36.74
IV.ESML.HHN. ML:1.1 0.00013744645 0.192 AML other m 2021-01-01T18:07:36.73
IV.ENIC.HHN. ML:1.5 0.00045622125 0.2688 AML other m 2021-01-01T18:07:38.39
IV.ESML.HHE. ML:1.4 0.000282067 0.1792 AML other m 2021-01-01T18:07:39.17
IV.EPZF.HHN. ML:1.6 0.0002785 0.48 AML other m 2021-01-01T18:07:39.51
IV.EPZF.HHE. ML:1.6 0.000249 1.68 AML other m 2021-01-01T18:07:40.06
IV.HLNI.HHE. ML:1.3 0.00008413185 0.128 AML other m 2021-01-01T18:07:42.05
IV.HLNI.HHN. ML:1.3 0.000074821535 0.1152 AML other m 2021-01-01T18:07:42.15
IV.HCRL.HHE. ML:1.6 0.00012507085 0.1152 AML other m 2021-01-01T18:07:44.09
IV.HAGA.HHN. ML:1.4 0.000078503645 0.2048 AML other m 2021-01-01T18:07:44.53
IV.HAGA.HHE. ML:1.5 0.00010037259 0.1792 AML other m 2021-01-01T18:07:44.49
IV.HCRL.HHN. ML:1.4 0.000090214285 0.1536 AML other m 2021-01-01T18:07:44.57
IV.HAVL.HHE. ML:2.1 0.00017461388 0.1024 AML other m 2021-01-01T18:07:54.43
IV.HAVL.HHN. ML:2.1 0.00019682454999999998 0.1024 AML other m 2021-01-01T18:07:54.69
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