Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 11-08-2019 and time 23:40:18 (Italy) in region 2 km NW Sant'Alfio (CT)

A magnitude ML 1.5 earthquake occured in region: 2 km NW Sant'Alfio (CT), on

  • 11-08-2019 21:40:18 (UTC)
  • 11-08-2019 23:40:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7550, 15.1230 at 9 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
Sant'Alfio CT 2 1582 1582
Milo CT 3 1087 2669
Giarre CT 6 27659 30328
Mascali CT 7 14282 44610
Zafferana Etnea CT 7 9517 54127
Riposto CT 8 14838 68965
Santa Venerina CT 8 8592 77557
Piedimonte Etneo CT 8 3963 81520
Fiumefreddo di Sicilia CT 9 9623 91143
Linguaglossa CT 10 5403 96546
Calatabiano CT 12 5308 101854
Castiglione di Sicilia CT 14 3215 105069
Gaggi ME 15 3184 108253
Trecastagni CT 16 10910 119163
Pedara CT 16 14102 133265
Viagrande CT 16 8563 141828
Acireale CT 16 52622 194450
Aci Sant'Antonio CT 16 17984 212434
Motta Camastra ME 16 845 213279
Francavilla di Sicilia ME 17 3945 217224
Giardini-Naxos ME 17 9415 226639
Aci Catena CT 17 29851 256490
Moio Alcantara ME 17 717 257207
Aci Bonaccorsi CT 17 3524 260731
Nicolosi CT 18 7463 268194
Taormina ME 18 10960 279154
Graniti ME 18 1492 280646
Castelmola ME 18 1088 281734
Malvagna ME 19 733 282467
Valverde CT 19 7840 290307
San Giovanni la Punta CT 20 23060 313367

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km N of Acireale (52622 inhabitants)
28 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
62 Km SW of Messina (238439 inhabitants)
79 Km N of Siracusa (122291 inhabitants)
98 Km E of Caltanissetta (63360 inhabitants)
98 Km NE of Ragusa (73313 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 2019-08-11
21:40:18		 37.7547 15.1228 9 2019-11-13
14:31:06		 Bollettino Sismico Italiano INGV 73250511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-11 21:40:18 ± 0.15
Latitude 37.7547 ± 0.0054
Longitude 15.1228 ± 0.0080
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73250511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 692
Semi-minor axis of confidence ellipse (meter) 441
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
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) 146
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43167
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 73250511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-14 12:39:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPNC.HHZ. 2019-08-11T21:40:28.28 0.6 undecidable manual P 25 47.9187 50 0.45 43
IV.EPZF.HHZ. 2019-08-11T21:40:27.66 0.6 undecidable manual S 288 24.5532 110 -0.13 48
IV.MUCR.HHZ. 2019-08-11T21:40:26.66 0.3 undecidable manual P 326 38.7279 50 0.24 68
IV.EMSG.HHZ. 2019-08-11T21:40:24.65 0.6 undecidable manual S 296 16.872 118 -0.69 41
IV.AIO.HHE. 2019-08-11T21:40:24.05 0.1 undecidable manual P 22 25.8519 109 -0.17 94
IV.ECHR.HHZ. 2019-08-11T21:40:24.39 3.0 undecidable manual P 0
IV.ECTS.EHZ. 2019-08-11T21:40:24.51 0.6 undecidable manual S 359 14.0748 122 -0.01 50
IV.EPZF.HHZ. 2019-08-11T21:40:24.01 0.6 undecidable manual P 288 24.5532 110 0.04 49
IV.ESLN.HHZ. 2019-08-11T21:40:24.78 0.3 undecidable manual S 242 14.6742 121 0.1 73
IV.EMCN.HNZ. 2019-08-11T21:40:23.41 0.6 undecidable manual S 297 8.7801 135 0.34 47
IV.EPIT.HHN. 2019-08-11T21:40:23.48 0.3 undecidable manual S 317 8.5803 136 0.48 68
IV.EVRN.HNN. 2019-08-11T21:40:23.07 0.3 undecidable manual S 171 7.3815 140 0.35 70
IV.EMSG.HHZ. 2019-08-11T21:40:22.92 0.3 undecidable manual P 296 16.872 118 0.37 69
IV.ESLN.HHZ. 2019-08-11T21:40:21.79 0.3 undecidable manual P 242 14.6742 121 -0.38 69
IV.EMCN.HNZ. 2019-08-11T21:40:21.10 0.1 negative manual P 297 8.7801 135 -0.14 98
IV.EPIT.HHN. 2019-08-11T21:40:21.17 0.1 positive manual P 317 8.5803 136 -0.03 100
IV.ECTS.EHZ. 2019-08-11T21:40:21.81 0.1 undecidable manual P 359 14.0748 122 -0.26 94
IV.EVRN.HNN. 2019-08-11T21:40:20.81 0.1 positive manual P 171 7.3815 140 -0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHE. ML:0.0 0.000827127 0.2944 AML other m 2019-08-11T21:40:30.86
IV.EMSG.HHN. ML:0.0 0.0007165017500000001 0.2816 AML other m 2019-08-11T21:40:29.05
IV.ESLN.HHN. ML:1.4 0.000280969 0.4864 AML other m 2019-08-11T21:40:26.69
IV.ESLN.HHE. ML:1.5 0.00030373105 0.448 AML other m 2019-08-11T21:40:26.91
IV.ECTS.EHN. ML:1.2 0.000183864235 0.32 AML other m 2019-08-11T21:40:25.14
IV.ECTS.EHE. ML:1.5 0.00030455025000000003 0.256 AML other m 2019-08-11T21:40:25.08
IV.EPZF.HHE. ML:1.7 0.00032982265 0.32 AML other m 2019-08-11T21:40:31.99
IV.EPZF.HHN. ML:1.7 0.00027961735 0.5632 AML other m 2019-08-11T21:40:35.51
IV.MUCR.HHN. ML:1.3 0.000068300925 0.3328 AML other m 2019-08-11T21:40:37.46
IV.MUCR.HHE. ML:1.1 0.00005010607 0.5376 AML other m 2019-08-11T21:40:38.54
IV.MPNC.HHN. ML:1.5 0.000090724625 0.4992 AML other m 2019-08-11T21:40:37.42
IV.MPNC.HHE. ML:1.6 0.00010066127499999999 0.448 AML other m 2019-08-11T21:40:39.45
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