Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 17-02-2021 and time 18:10:19 (Italy) in region 10 km N Ragalna (CT)

A magnitude ML 2.0 earthquake occured in region: 10 km N Ragalna (CT), on

  • 17-02-2021 17:10:19 (UTC)
  • 17-02-2021 18:10:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7190, 14.9680 at 7 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 10 3924 3924
Biancavilla CT 12 24007 27931
Zafferana Etnea CT 12 9517 37448
Nicolosi CT 13 7463 44911
Milo CT 13 1087 45998
Santa Maria di Licodia CT 13 7641 53639
Adrano CT 13 36122 89761
Pedara CT 14 14102 103863
Belpasso CT 14 28108 131971
Bronte CT 14 19172 151143
Trecastagni CT 15 10910 162053
Maletto CT 15 3920 165973
Santa Venerina CT 16 8592 174565
Sant'Alfio CT 16 1582 176147
Viagrande CT 17 8563 184710
Paternò CT 17 48228 232938
San Pietro Clarenza CT 17 7743 240681
Camporotondo Etneo CT 17 5023 245704
Mascalucia CT 18 31958 277662
Randazzo CT 18 10900 288562
Aci Bonaccorsi CT 18 3524 292086
Tremestieri Etneo CT 18 20589 312675
Aci Sant'Antonio CT 19 17984 330659
Giarre CT 19 27659 358318
San Giovanni la Punta CT 19 23060 381378
Gravina di Catania CT 19 25838 407216
Aci Catena CT 20 29851 437067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
26 Km NW of Catania (314555 inhabitants)
74 Km SW of Reggio di Calabria (183035 inhabitants)
74 Km SW of Messina (238439 inhabitants)
79 Km NW of Siracusa (122291 inhabitants)
84 Km E of Caltanissetta (63360 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
96 Km NE of Gela (75827 inhabitants)
97 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 2.0 2021-02-17
17:10:19		 37.7187 14.9678 7 2021-07-12
16:55:00		 Bollettino Sismico Italiano INGV 87772861
Reviewed
Rev200 		ML 1.5 2021-02-17
17:10:18		 37.722 14.989 4 2021-06-09
13:34:46		 Sala Operativa INGV_OE (Catania) 87247441
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-17 17:10:19 ± 0.05
Latitude 37.7187 ± 0.0018
Longitude 14.9678 ± 0.0034
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87772861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 258
Semi-minor axis of confidence ellipse (meter) 135
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.76802
Number of stations at which the event was observed 34
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 87772861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-05 09:43:06

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 87247441
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-02-17 17:17:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCEL.HHZ. 2021-02-17T17:10:45.50 3.0 undecidable manual Sg 16.389999 0
IV.TDS.HHZ. 2021-02-17T17:10:44.50 3.0 undecidable manual Sn -3.64 0
IV.SSY.HHZ. 2021-02-17T17:10:39.63 0.6 undecidable manual S 171 62.8926 50 0.2 58
IV.MPNC.HHZ. 2021-02-17T17:10:38.31 0.3 undecidable manual S 35 58.1973 50 0.14 89
IV.HAVL.HHZ. 2021-02-17T17:10:34.59 0.6 undecidable manual P 171 85.248 50 0.23 56
IV.HLNI.HHZ. 2021-02-17T17:10:33.59 0.3 undecidable manual S 192 41.9247 50 -0.23 90
IV.MSRU.HHZ. 2021-02-17T17:10:33.17 0.6 undecidable manual P 38 76.7676 50 0.13 58
IV.MUCR.HHZ. 2021-02-17T17:10:32.42 0.3 undecidable manual S 347 36.9297 101 0.1 94
IV.SSY.HHZ. 2021-02-17T17:10:31.09 0.3 undecidable manual P 171 62.8926 50 0.18 88
IV.MPNC.HHZ. 2021-02-17T17:10:30.38 0.3 undecidable manual P 35 58.1973 50 0.19 88
IV.HLNI.HHZ. 2021-02-17T17:10:27.28 0.6 undecidable manual P 192 41.9247 50 -0.39 58
IV.MUCR.HHZ. 2021-02-17T17:10:26.57 0.3 undecidable manual P 347 36.9297 101 -0.24 91
IV.NOV.HHZ. 2021-02-17T17:10:26.76 0.6 undecidable manual P 23 37.3293 101 -0.14 62
IV.GALF.HHZ. 2021-02-17T17:10:26.73 0.6 undecidable manual P 269 35.2425 101 0.25 61
IV.AIO.HHZ. 2021-02-17T17:10:26.32 0.6 undecidable manual P 40 36.4413 101 -0.39 59
IV.ESAL.HHZ. 2021-02-17T17:10:25.29 0.3 undecidable manual S 74 15.1737 115 0.2 95
IV.EPZF.HHZ. 2021-02-17T17:10:24.92 0.3 undecidable manual S 320 15.1737 115 -0.18 96
IV.EMSG.HHZ. 2021-02-17T17:10:24.23 0.3 undecidable manual S 352 11.4774 122 0.28 94
IV.ESCV.HHZ. 2021-02-17T17:10:24.44 0.3 undecidable manual S 283 13.7751 117 -0.2 95
IV.EFIU.HHZ. 2021-02-17T17:10:24.05 0.6 undecidable manual P 70 22.6551 107 0.01 65
IV.EPIT.HHZ. 2021-02-17T17:10:24.43 0.3 undecidable manual S 37 12.876 119 0.05 99
IV.ESML.HHZ. 2021-02-17T17:10:24.82 0.3 undecidable manual S 215 13.5753 117 0.23 95
IV.EVRN.HHZ. 2021-02-17T17:10:24.77 0.6 undecidable manual S 102 15.0738 115 -0.29 62
IV.ENIC.HHZ. 2021-02-17T17:10:23.41 0.3 undecidable manual S 154 10.7781 123 -0.34 93
IV.EPIT.HHZ. 2021-02-17T17:10:22.18 0.3 undecidable manual P 37 12.876 119 -0.05 99
IV.ESML.HHZ. 2021-02-17T17:10:22.58 0.3 undecidable manual P 215 13.5753 117 0.23 95
IV.EMPL.HHZ. 2021-02-17T17:10:22.56 0.3 undecidable manual S 177 4.3956 148 0.39 93
IV.EVRN.HHZ. 2021-02-17T17:10:22.27 0.6 undecidable manual P 102 15.0738 115 -0.35 62
IV.EPZF.HHZ. 2021-02-17T17:10:22.31 0.6 undecidable manual P 320 15.1737 115 -0.33 62
IV.ESAL.HHZ. 2021-02-17T17:10:22.72 0.6 undecidable manual P 74 15.1737 115 0.09 65
IV.EMSG.HHZ. 2021-02-17T17:10:22.03 0.3 undecidable manual P 352 11.4774 122 0.06 99
IV.ESCV.HHZ. 2021-02-17T17:10:22.32 0.3 undecidable manual P 283 13.7751 117 -0.06 98
IV.ENIC.HHZ. 2021-02-17T17:10:21.75 0.6 undecidable manual P 154 10.7781 123 -0.11 65
IV.EMPL.HHZ. 2021-02-17T17:10:20.89 0.3 undecidable manual P 177 4.3956 148 -0.06 100
CR.STON.BHZ. 2021-02-17T17:10:11.26 3.0 negative manual Pg 12.99 0
IV.ZONE.HHZ. 2021-02-17T17:10:10.73 3.0 positive manual Pn 1.95 0
IT.FIE.HGZ. 2021-02-17T17:10:08.03 3.0 undecidable manual Sg 2.33 0
IV.CSNT.HHZ. 2021-02-17T17:10:01.44 3.0 undecidable manual Sg 0.08 0
IV.RIBO.EHZ.01 2021-02-17T17:09:44.94 3.0 undecidable manual Pg 5.93 0
IV.MRB1.HHZ. 2021-02-17T17:09:44.41 3.0 positive manual Pn 3.73 0
IV.RMP.HHZ. 2021-02-17T17:09:39.66 3.0 undecidable manual S -1.71 0
IV.BRSN.HNZ. 2021-02-17T17:09:35.80 3.0 undecidable manual Pn -5.4 0
IV.TOLF.HHZ. 2021-02-17T17:09:27.39 3.0 negative manual Pn -3.5 0
IV.ARVD.HHZ. 2021-02-17T17:09:25.79 3.0 negative manual Pg -1.94 0
IV.TERO.HHZ. 2021-02-17T17:09:19.16 3.0 undecidable manual P 3.2 0
IV.SMA1.EHZ. 2021-02-17T17:09:17.65 3.0 undecidable manual P 2.38 0
IV.RM33.EHZ. 2021-02-17T17:09:16.15 3.0 positive manual Pn -0.15 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESCV.HHN. ML:2.0 0.0012900000000000001 0.68 AML other m 2021-02-17T17:10:29.05
IV.ESCV.HHE. ML:2.1 0.0013900000000000002 0.22 AML other m 2021-02-17T17:10:29.17
IV.GALF.HHN. ML:2.1 0.000503 0.92 AML other m 2021-02-17T17:10:35.90
IV.GALF.HHE. ML:2.0 0.0003685 1 AML other m 2021-02-17T17:10:38.96
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