Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 06-07-2021 and time 20:49:36 (Italy) in region 1 km E Nicolosi (CT)

A magnitude ML 1.9 earthquake occured in region: 1 km E Nicolosi (CT), on

  • 06-07-2021 18:49:36 (UTC)
  • 06-07-2021 20:49:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6140, 15.0400 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
Nicolosi CT 1 7463 7463
Pedara CT 2 14102 21565
Trecastagni CT 4 10910 32475
Mascalucia CT 5 31958 64433
San Pietro Clarenza CT 5 7743 72176
Viagrande CT 5 8563 80739
Tremestieri Etneo CT 5 20589 101328
Camporotondo Etneo CT 6 5023 106351
Belpasso CT 6 28108 134459
Gravina di Catania CT 6 25838 160297
San Giovanni la Punta CT 6 23060 183357
Aci Bonaccorsi CT 6 3524 186881
Sant'Agata li Battiati CT 7 9479 196360
Aci Sant'Antonio CT 8 17984 214344
San Gregorio di Catania CT 8 11966 226310
Valverde CT 8 7840 234150
Ragalna CT 9 3924 238074
Aci Catena CT 9 29851 267925
Zafferana Etnea CT 11 9517 277442
Misterbianco CT 11 49410 326852
Acireale CT 11 52622 379474
Aci Castello CT 11 18723 398197
Santa Venerina CT 12 8592 406789
Paternò CT 13 48228 455017
Motta Sant'Anastasia CT 13 12116 467133
Catania CT 13 314555 781688
Santa Maria di Licodia CT 13 7641 789329
Milo CT 14 1087 790416
Biancavilla CT 15 24007 814423
Sant'Alfio CT 17 1582 816005
Giarre CT 18 27659 843664
Adrano CT 19 36122 879786
Riposto CT 20 14838 894624

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km W of Acireale (52622 inhabitants)
13 Km NW of Catania (314555 inhabitants)
66 Km NW of Siracusa (122291 inhabitants)
77 Km SW of Reggio di Calabria (183035 inhabitants)
79 Km SW of Messina (238439 inhabitants)
81 Km NE of Ragusa (73313 inhabitants)
86 Km NE of Vittoria (63339 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
87 Km N of Modica (54633 inhabitants)
93 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 1.9 2021-07-06
18:49:36		 37.6142 15.0402 7 2021-12-29
11:12:29		 Bollettino Sismico Italiano INGV 95340121
Reviewed
Rev200 		ML 1.6 2021-07-06
18:49:36		 37.669 15.019 6 2021-09-12
10:25:47		 Sala Operativa INGV_OE (Catania) 92318461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-06 18:49:36 ± 0.09
Latitude 37.6142 ± 0.0045
Longitude 15.0402 ± 0.0079
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95340121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 660
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
Circular confidence region, given by single value of horizontal uncertainty (meter) 660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 100
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 40
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.74554
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 95340121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-12 10:25:22

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 92318461
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-07-06 18:54:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMGO.HHZ. 2021-07-06T18:50:06.71 3.0 undecidable manual P 1.26 0
IV.HAVL.HHZ. 2021-07-06T18:49:59.90 0.6 undecidable manual S 174 72.9714 50 0.67 38
IV.HVIT.HHZ. 2021-07-06T18:49:50.59 0.6 undecidable manual P 214 82.7505 50 -0.52 40
IV.HAGA.HHZ. 2021-07-06T18:49:50.28 0.6 undecidable manual S 164 37.9287 101 0.44 44
IV.HAVL.HHZ. 2021-07-06T18:49:49.45 0.3 undecidable manual P 174 72.9714 50 -0.15 66
IV.HCRL.HHZ. 2021-07-06T18:49:49.91 0.6 undecidable manual S 181 36.741 101 0.46 44
IV.RAFF.HHZ. 2021-07-06T18:49:49.58 0.3 undecidable manual P 234 73.8705 50 -0.16 65
IV.MSFR.HHZ. 2021-07-06T18:49:48.72 0.3 undecidable manual P 320 60.8946 50 0.97 51
IV.HLNI.HHZ. 2021-07-06T18:49:47.81 0.6 undecidable manual S 207 32.9448 102 -0.36 45
IV.SSY.HHZ. 2021-07-06T18:49:46.04 0.3 undecidable manual P 177 50.7159 50 -0.14 69
IV.GALF.HHZ. 2021-07-06T18:49:45.66 0.3 undecidable manual P 285 42.9237 50 0.68 60
IV.HAGA.HHZ. 2021-07-06T18:49:44.07 0.3 undecidable manual P 164 37.9287 101 -0.11 71
IV.HCRL.HHZ. 2021-07-06T18:49:43.61 0.1 undecidable manual P 181 36.741 101 -0.35 90
IV.ECZM.HHN. 2021-07-06T18:49:43.48 0.6 undecidable manual S 317 17.6712 112 0.4 46
IV.ESML.HHZ. 2021-07-06T18:49:42.04 0.6 undecidable manual S 272 14.1747 117 0.07 50
IV.EPZF.HHZ. 2021-07-06T18:49:42.34 0.6 undecidable manual P 325 28.2495 104 0.04 49
IV.ECPN.HHZ. 2021-07-06T18:49:42.15 0.6 undecidable manual S 342 15.0738 116 -0.13 49
IV.ECHR.HHE. 2021-07-06T18:49:42.54 0.6 undecidable manual S 306 13.7751 118 0.69 42
IV.HLNI.HHZ. 2021-07-06T18:49:42.64 0.1 undecidable manual P 207 32.9448 102 -0.58 85
IV.EMFS.HHE. 2021-07-06T18:49:41.31 0.6 undecidable manual S 342 12.2766 121 -0.09 49
IV.EMPL.HHZ. 2021-07-06T18:49:41.06 0.6 undecidable manual S 320 9.4794 128 0.47 46
IV.ESCV.HHZ. 2021-07-06T18:49:41.67 0.6 undecidable manual P 307 24.6531 106 0.07 49
IV.EMFO.HHE. 2021-07-06T18:49:41.31 0.6 undecidable manual S 18 14.1747 117 -0.67 42
IV.EVRN.HHZ. 2021-07-06T18:49:41.79 0.6 undecidable manual S 45 11.7771 122 0.52 45
IV.EMSG.HHZ. 2021-07-06T18:49:41.20 0.3 undecidable manual P 341 24.2535 107 -0.32 69
IV.ESPC.HHN. 2021-07-06T18:49:40.23 0.6 undecidable manual S 353 8.7801 130 -0.18 49
IV.EPOZ.HHZ. 2021-07-06T18:49:40.64 0.3 undecidable manual P 64 14.4744 117 0.93 57
IV.EPIT.HHZ. 2021-07-06T18:49:40.86 0.1 undecidable manual P 4 21.867 108 -0.22 95
IV.ESAL.HHZ. 2021-07-06T18:49:40.57 0.3 undecidable manual P 28 17.6712 112 0.28 71
IV.ECZM.HHN. 2021-07-06T18:49:40.28 0.1 undecidable manual P 317 17.6712 112 0 100
IV.EMFO.HHE. 2021-07-06T18:49:39.13 0.1 undecidable manual P 18 14.1747 117 -0.51 90
IV.EVRN.HHZ. 2021-07-06T18:49:39.53 0.3 undecidable manual P 45 11.7771 122 0.3 71
IV.ENIC.HHZ. 2021-07-06T18:49:39.98 0.6 undecidable manual S 319 2.4975 161 0.85 40
IV.ESML.HHZ. 2021-07-06T18:49:39.71 0.1 positive manual P 272 14.1747 117 0.07 99
IV.ECPN.HHZ. 2021-07-06T18:49:39.42 0.1 undecidable manual P 342 15.0738 116 -0.39 92
IV.ECHR.HHE. 2021-07-06T18:49:39.66 0.1 undecidable manual P 306 13.7751 118 0.09 99
IV.EMFS.HHE. 2021-07-06T18:49:38.91 0.1 undecidable manual P 342 12.2766 121 -0.41 93
IV.ESPC.HHN. 2021-07-06T18:49:38.47 0.1 undecidable manual P 353 8.7801 130 -0.27 96
IV.ENIC.HHZ. 2021-07-06T18:49:38.20 0.1 positive manual P 319 2.4975 161 0.2 98
IV.ESLN.HHZ. 2021-07-06T18:49:38.78 0.1 undecidable manual P 327 10.4784 125 -0.23 96
IV.EMPL.HHZ. 2021-07-06T18:49:38.78 0.1 undecidable manual P 320 9.4794 128 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHN. ML:2.8 0.01025 0.98 AML other m 2021-07-06T18:49:42.02
IV.ESML.HHE. ML:1.9 0.0009490000000000001 0.6 AML other m 2021-07-06T18:49:43.19
IV.ESML.HNE. ML:1.9 0.000825 0.64 AML other m 2021-07-06T18:49:43.19
IV.EVRN.HHE. ML:2.2 0.0023200000000000004 0.18 AML other m 2021-07-06T18:49:43.59
IV.EVRN.HNE. ML:2.2 0.00209 0.18 AML other m 2021-07-06T18:49:43.59
IV.ESML.HHN. ML:1.8 0.0007675000000000001 1.42 AML other m 2021-07-06T18:49:44.11
IV.ESML.HNN. ML:1.8 0.0007615 1.44 AML other m 2021-07-06T18:49:44.11
IV.EVRN.HHN. ML:2.3 0.0023899999999999998 1.62 AML other m 2021-07-06T18:49:45.09
IV.EVRN.HNN. ML:2.3 0.00249 0.72 AML other m 2021-07-06T18:49:45.09
IV.ESAL.HHE. ML:1.8 0.0006359999999999998 0.74 AML other m 2021-07-06T18:49:46.50
IV.ESAL.HHN. ML:1.7 0.00046899999999999996 0.76 AML other m 2021-07-06T18:49:46.53
IV.EMPL.HHE. ML:2.7 0.00879 0.2 AML other m 2021-07-06T18:49:46.50
IV.EPIT.HHN. ML:1.9 0.000575 0.5 AML other m 2021-07-06T18:49:48.43
IV.EPIT.HHE. ML:1.8 0.00043 0.32 AML other m 2021-07-06T18:49:49.22
IV.ESCV.HHE. ML:2.0 0.0006450000000000001 1 AML other m 2021-07-06T18:49:49.90
IV.ESCV.HHN. ML:2.1 0.000754 0.74 AML other m 2021-07-06T18:49:49.76
IV.EPZF.HHE. ML:1.7 0.0002815 1.2 AML other m 2021-07-06T18:49:50.05
IV.HLNI.HHE. ML:1.5 0.000128 0.52 AML other m 2021-07-06T18:49:50.14
IV.EPZF.HHN. ML:1.7 0.00027449999999999995 1.02 AML other m 2021-07-06T18:49:50.93
IV.HCRL.HHE. ML:2.2 0.000565 0.44 AML other m 2021-07-06T18:49:50.46
IV.HCRL.HHN. ML:2.0 0.0003745 0.44 AML other m 2021-07-06T18:49:50.48
IV.EMSG.HHN. ML:1.8 0.00039449999999999994 0.26 AML other m 2021-07-06T18:49:51.30
IV.HLNI.HHN. ML:1.4 0.00010845000000000001 1.32 AML other m 2021-07-06T18:49:51.33
IV.HAGA.HHE. ML:1.7 0.0001815 0.16 AML other m 2021-07-06T18:49:51.79
IV.HAGA.HHN. ML:1.6 0.0001625 0.6 AML other m 2021-07-06T18:49:52.68
IV.EMSG.HHE. ML:1.6 0.0002835 0.4 AML other m 2021-07-06T18:49:54.65
IV.SSY.HHE. ML:2.3 0.0004935 0.64 AML other m 2021-07-06T18:49:57.58
IV.GALF.HHN. ML:2.0 0.00030649999999999997 0.64 AML other m 2021-07-06T18:49:58.63
IV.SSY.HHN. ML:2.7 0.0012150000000000002 1.48 AML other m 2021-07-06T18:49:59.91
IV.HVZN.HHN. ML:1.8 0.00014150000000000002 0.92 AML other m 2021-07-06T18:49:59.37
IV.GALF.HHE. ML:2.0 0.0003155 0.44 AML other m 2021-07-06T18:50:00.29
IV.HVZN.HHE. ML:1.8 0.000142 0.62 AML other m 2021-07-06T18:50:00.57
IV.HAVL.HHE. ML:2.1 0.0002055 0.28 AML other m 2021-07-06T18:50:01.74
IV.RAFF.HHE. ML:1.6 0.00006035 0.54 AML other m 2021-07-06T18:50:02.58
IV.HAVL.HHN. ML:2.2 0.0002575 0.26 AML other m 2021-07-06T18:50:02.69
IV.HMDC.HHE. ML:2.1 0.000184 0.56 AML other m 2021-07-06T18:50:02.43
IV.HMDC.HHN. ML:2.0 0.000152 0.58 AML other m 2021-07-06T18:50:02.62
IV.RAFF.HHN. ML:1.5 0.000052449999999999994 0.48 AML other m 2021-07-06T18:50:04.43
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