Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 24-08-2021 and time 06:13:28 (Italy) in region 11 km W Milo (CT)

A magnitude ML 1.2 earthquake occured in region: 11 km W Milo (CT), on

  • 24-08-2021 04:13:28 (UTC)
  • 24-08-2021 06:13:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7570, 15.0040 at 2 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 11 9517 10604
Sant'Alfio CT 13 1582 12186
Santa Venerina CT 14 8592 20778
Maletto CT 15 3920 24698
Randazzo CT 15 10900 35598
Ragalna CT 15 3924 39522
Bronte CT 15 19172 58694
Linguaglossa CT 16 5403 64097
Nicolosi CT 16 7463 71560
Giarre CT 16 27659 99219
Pedara CT 16 14102 113321
Moio Alcantara ME 16 717 114038
Piedimonte Etneo CT 16 3963 118001
Trecastagni CT 17 10910 128911
Mascali CT 17 14282 143193
Biancavilla CT 17 24007 167200
Castiglione di Sicilia CT 18 3215 170415
Riposto CT 18 14838 185253
Viagrande CT 18 8563 193816
Santa Domenica Vittoria ME 18 980 194796
Adrano CT 18 36122 230918
Belpasso CT 18 28108 259026
Fiumefreddo di Sicilia CT 19 9623 268649
Santa Maria di Licodia CT 19 7641 276290
Malvagna ME 19 733 277023
Roccella Valdemone ME 20 666 277689
Francavilla di Sicilia ME 20 3945 281634
Aci Sant'Antonio CT 20 17984 299618
Aci Bonaccorsi CT 20 3524 303142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
69 Km SW of Messina (238439 inhabitants)
82 Km NW of Siracusa (122291 inhabitants)
88 Km E of Caltanissetta (63360 inhabitants)
96 Km N of Ragusa (73313 inhabitants)
99 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 1.2 2021-08-24
04:13:28		 37.757 15.0038 2 2021-12-29
11:12:25		 Bollettino Sismico Italiano INGV 94952201
Reviewed
Rev200 		ML 1.7 2021-08-24
04:13:27		 37.75 14.996 0 2021-12-01
10:58:14		 Sala Operativa INGV_OE (Catania) 94559981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-24 04:13:28 ± 0.08
Latitude 37.7570 ± 0.0054
Longitude 15.0038 ± 0.0068
Depth (km) 2 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94952201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 640
Semi-minor axis of confidence ellipse (meter) 510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 307
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00809
Epicentral distance of station farthest from the epicenter (degree) 0.14929
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 94559981
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-08-24 04:31:59

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 3
Type of magnitude ML
Reference to an origin 94952201
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-01 10:58:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EMPL.HHZ. 2021-08-24T04:13:32.65 0.6 undecidable manual S 199 9.1797 104 1.01 40
IV.ENIC.HHZ. 2021-08-24T04:13:31.65 0.6 undecidable manual P 174 13.9749 99 0.44 49
IV.ECHR.HNZ. 2021-08-24T04:13:31.24 0.3 undecidable manual P 226 11.1777 102 0.58 71
IV.ESCV.HHZ. 2021-08-24T04:13:31.63 0.3 undecidable manual P 266 16.5723 98 -0.09 79
IV.EPZF.HHZ. 2021-08-24T04:13:31.80 0.3 undecidable manual P 300 14.874 99 0.42 74
IV.EPIT.HHZ. 2021-08-24T04:13:30.09 0.3 undecidable manual P 38 7.5813 107 0.13 80
IV.ESVO.HHZ. 2021-08-24T04:13:30.51 0.6 undecidable manual S 290 5.2947 113 0.13 53
IV.ESAL.HHZ. 2021-08-24T04:13:30.65 0.3 undecidable manual P 91 11.4774 101 -0.06 80
IV.ECBD.HHZ. 2021-08-24T04:13:30.19 0.3 undecidable manual P 70 7.6812 107 0.21 79
IV.EMSG.HHZ. 2021-08-24T04:13:30.46 0.3 undecidable manual P 326 8.4804 105 0.32 77
IV.EMFS.HHZ. 2021-08-24T04:13:30.02 0.6 undecidable manual S 187 4.1958 119 0 55
IV.ECZM.HHZ. 2021-08-24T04:13:30.48 0.3 undecidable manual P 252 9.1797 104 0.21 78
IV.EMCN.HHZ. 2021-08-24T04:13:30.86 0.6 undecidable manual S 34 4.5954 117 0.7 46
IV.EMPL.HHZ. 2021-08-24T04:13:30.29 0.3 undecidable manual P 199 9.1797 104 0.03 81
IV.ESPC.HHZ. 2021-08-24T04:13:29.98 0.3 undecidable manual P 164 7.4814 107 0.05 81
IV.EMCN.HHZ. 2021-08-24T04:13:29.33 0.3 undecidable manual P 34 4.5954 117 -0.07 81
IV.ESVO.HHZ. 2021-08-24T04:13:29.17 0.3 undecidable manual P 290 5.2947 113 -0.36 76
IV.ESLN.HHZ. 2021-08-24T04:13:29.93 0.3 undecidable manual P 200 7.4814 107 -0.01 82
IV.EMFO.HHZ. 2021-08-24T04:13:29.82 0.3 undecidable manual P 107 7.881 106 -0.2 79
IV.EMFS.HHZ. 2021-08-24T04:13:29.06 0.3 undecidable manual P 187 4.1958 119 -0.27 78
IV.EPDN.HHZ. 2021-08-24T04:13:29.56 0.6 undecidable manual S 49 1.4985 147 0.24 53
IV.ECPN.HHZ. 2021-08-24T04:13:28.09 0.3 undecidable manual P 226 2.0979 137 -0.91 63
IV.EPDN.HHZ. 2021-08-24T04:13:28.52 0.3 undecidable manual P 49 1.4985 147 -0.4 76
IV.ECNE.HHZ. 2021-08-24T04:13:28.97 0.6 undecidable manual S 349 0.8991 158 -0.26 52
IV.ECPN.HHZ. 2021-08-24T04:13:28.89 0.6 undecidable manual S 226 2.0979 137 -0.57 48
IV.ECNE.HHZ. 2021-08-24T04:13:28.39 0.1 undecidable manual P 349 0.8991 158 -0.48 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHE. ML:2.1 0.00147435745 0.2592 AML other m 2021-08-24T04:13:34.52
IV.EMPL.HHN. ML:2.0 0.0012665125 0.2816 AML other m 2021-08-24T04:13:34.45
IV.EPIT.HHE. ML:1.8 0.0010789058499999999 0.1792 AML other m 2021-08-24T04:13:34.72
IV.ESAL.HHN. ML:1.2 0.00022372805000000001 0.3616 AML other m 2021-08-24T04:13:34.85
IV.EMSG.HHE. ML:1.5 0.00046665929 0.16 AML other m 2021-08-24T04:13:35.02
IV.ESCV.HHE. ML:1.1 0.000127637 0.2624 AML other m 2021-08-24T04:13:35.44
IV.ESAL.HHE. ML:1.4 0.0004198592 0.2816 AML other m 2021-08-24T04:13:35.70
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