Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 12-09-2021 and time 03:33:42 (Italy) in region 11 km W Milo (CT)

A magnitude ML 1.6 earthquake occured in region: 11 km W Milo (CT), on

  • 12-09-2021 01:33:42 (UTC)
  • 12-09-2021 03:33:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7520, 14.9940 at 4 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
Milo CT 11 1087 1087
Zafferana Etnea CT 12 9517 10604
Sant'Alfio CT 13 1582 12186
Maletto CT 14 3920 16106
Ragalna CT 14 3924 20030
Santa Venerina CT 15 8592 28622
Randazzo CT 15 10900 39522
Bronte CT 15 19172 58694
Nicolosi CT 16 7463 66157
Pedara CT 16 14102 80259
Biancavilla CT 16 24007 104266
Linguaglossa CT 17 5403 109669
Trecastagni CT 17 10910 120579
Giarre CT 17 27659 148238
Moio Alcantara ME 17 717 148955
Adrano CT 17 36122 185077
Piedimonte Etneo CT 17 3963 189040
Mascali CT 18 14282 203322
Santa Maria di Licodia CT 18 7641 210963
Belpasso CT 18 28108 239071
Viagrande CT 18 8563 247634
Castiglione di Sicilia CT 19 3215 250849
Santa Domenica Vittoria ME 19 980 251829
Riposto CT 19 14838 266667
Malvagna ME 19 733 267400
Fiumefreddo di Sicilia CT 19 9623 277023
Aci Bonaccorsi CT 20 3524 280547
Aci Sant'Antonio CT 20 17984 298531
San Pietro Clarenza CT 20 7743 306274

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
70 Km SW of Messina (238439 inhabitants)
81 Km NW of Siracusa (122291 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
95 Km N of Ragusa (73313 inhabitants)
98 Km NE of Vittoria (63339 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 1.6 2021-09-12
01:33:42		 37.7522 14.9945 4 2022-03-30
13:04:22		 Bollettino Sismico Italiano INGV 98590241
Reviewed
Rev200 		ML 1.6 2021-09-12
01:33:41		 37.749 15.002 0 2022-02-23
01:27:45		 Sala Operativa INGV_OE (Catania) 95322931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 01:33:42 ± 0.09
Latitude 37.7522 ± 0.0045
Longitude 14.9945 ± 0.0080
Depth (km) 4 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 98590241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 690
Semi-minor axis of confidence ellipse (meter) 510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 295
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.01079
Epicentral distance of station farthest from the epicenter (degree) 0.30577
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 95322931
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-09-12 01:43:24

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 98590241
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-23 01:27:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHE. 2021-09-12T01:33:50.07 0.3 undecidable manual P 342 33.9438 96 0.54 64
IV.AIO.HHE. 2021-09-12T01:33:49.88 0.3 undecidable manual P 41 32.0457 96 0.73 60
IV.ESML.HHZ. 2021-09-12T01:33:47.38 0.3 undecidable manual P 214 17.9709 101 1.02 54
IV.EFIU.HHZ. 2021-09-12T01:33:47.25 0.3 undecidable manual P 78 19.3695 100 0.62 64
IV.EPIT.HHZ. 2021-09-12T01:33:46.48 0.6 undecidable manual S 40 8.4804 112 0.59 44
IV.EMFO.HHZ. 2021-09-12T01:33:46.23 0.6 undecidable manual S 102 8.5803 112 0.32 47
IV.ECTS.HHZ. 2021-09-12T01:33:46.62 0.3 undecidable manual P 38 18.1707 101 0.22 72
IV.ESCV.HHZ. 2021-09-12T01:33:46.65 0.3 undecidable manual P 268 15.7731 103 0.73 62
IV.EMPL.HHZ. 2021-09-12T01:33:46.41 0.3 undecidable manual S 195 8.3805 113 0.56 67
IV.ECHR.HNZ. 2021-09-12T01:33:45.01 0.3 undecidable manual P 224 10.1787 109 0.15 74
IV.ESLN.HHZ. 2021-09-12T01:33:45.64 0.6 undecidable manual S 195 6.7932 118 0.31 48
IV.EPZF.HHZ. 2021-09-12T01:33:45.89 0.3 undecidable manual P 304 14.4744 104 0.22 72
IV.EVRN.HHZ. 2021-09-12T01:33:45.67 0.3 undecidable manual P 119 14.1747 104 0.05 75
IV.EMCN.HNZ. 2021-09-12T01:33:45.21 0.3 undecidable manual S 38 5.4945 123 0.25 73
IV.ESPC.HHZ. 2021-09-12T01:33:45.85 0.3 undecidable manual S 156 7.1928 116 0.37 71
IV.EPDN.HHZ. 2021-09-12T01:33:44.01 0.6 undecidable manual S 52 2.4975 145 -0.18 49
IV.EMPL.HHZ. 2021-09-12T01:33:44.45 0.3 undecidable manual P 195 8.3805 113 -0.06 75
IV.EMFO.HHZ. 2021-09-12T01:33:44.32 0.3 undecidable manual P 102 8.5803 112 -0.23 73
IV.EMFS.HHZ. 2021-09-12T01:33:44.20 0.3 undecidable manual S 175 3.5964 134 -0.24 73
IV.ESLN.HHZ. 2021-09-12T01:33:44.08 0.3 undecidable manual P 195 6.7932 118 -0.14 74
IV.EMSG.HHZ. 2021-09-12T01:33:44.75 0.6 positive manual P 333 8.5803 112 0.2 49
IV.EMNR.HHZ. 2021-09-12T01:33:44.26 0.3 undecidable manual P 21 7.6812 115 -0.12 74
IV.ECBD.HHZ. 2021-09-12T01:33:44.63 0.1 undecidable manual P 69 8.6802 112 0.07 100
IV.ESPC.HHZ. 2021-09-12T01:33:44.10 0.3 undecidable manual P 156 7.1928 116 -0.2 73
IV.ESVO.HHZ. 2021-09-12T01:33:44.67 0.6 undecidable manual S 299 4.7952 126 -0.08 50
IV.EPIT.HHZ. 2021-09-12T01:33:44.52 0.3 undecidable manual P 40 8.4804 112 -0.02 76
IV.ECZM.HHZ. 2021-09-12T01:33:44.66 0.6 undecidable manual P 254 8.2806 113 0.17 49
IV.ESVO.HHZ. 2021-09-12T01:33:43.41 0.3 undecidable manual P 299 4.7952 126 -0.47 69
IV.ECNE.HHZ. 2021-09-12T01:33:43.35 0.6 undecidable manual S 24 1.5984 156 -0.68 43
IV.EMCN.HNZ. 2021-09-12T01:33:43.79 0.3 undecidable manual P 38 5.4945 123 -0.21 73
IV.ECPN.HHZ. 2021-09-12T01:33:42.85 0.6 undecidable manual S 217 1.1988 162 -1.13 35
IV.EPDN.HHZ. 2021-09-12T01:33:42.82 0.1 undecidable manual P 52 2.4975 145 -0.73 84
IV.EMFS.HHZ. 2021-09-12T01:33:42.97 0.3 undecidable manual P 175 3.5964 134 -0.73 63
IV.ECPN.HHZ. 2021-09-12T01:33:42.47 0.1 undecidable manual P 217 1.1988 162 -0.96 76
IV.ECNE.HHZ. 2021-09-12T01:33:42.81 0.3 undecidable manual P 24 1.5984 156 -0.65 65
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESCV.HHE. ML:1.7 0.000616 1.42 AML other m 2021-09-12T01:33:52.83
IV.ESML.HHN. ML:1.4 0.00026250000000000004 0.54 AML other m 2021-09-12T01:33:54.66
IV.ESML.HNN. ML:1.4 0.000258 0.42 AML other m 2021-09-12T01:33:54.71
IV.ESML.HHE. ML:1.6 0.00033150000000000003 0.56 AML other m 2021-09-12T01:33:55.12
IV.ESML.HNE. ML:1.6 0.000363 0.6 AML other m 2021-09-12T01:33:55.12
IV.ESCV.HHN. ML:1.8 0.000754 0.42 AML other m 2021-09-12T01:33:58.19
IV.EPZF.HHE. ML:1.6 0.00044599999999999994 1.1 AML other m 2021-09-12T01:33:58.78
IV.EPZF.HHN. ML:1.8 0.000777 0.42 AML other m 2021-09-12T01:33:58.59
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