Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 07-10-2021 and time 11:13:43 (Italy) in region 4 km S Randazzo (CT)

A magnitude ML 1.5 earthquake occured in region: 4 km S Randazzo (CT), on

  • 07-10-2021 09:13:43 (UTC)
  • 07-10-2021 11:13:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8420, 14.9600 at 30 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
Randazzo CT 4 10900 10900
Santa Domenica Vittoria ME 8 980 11880
Maletto CT 8 3920 15800
Moio Alcantara ME 10 717 16517
Roccella Valdemone ME 11 666 17183
Malvagna ME 12 733 17916
Bronte CT 13 19172 37088
Maniace CT 14 3765 40853
Castiglione di Sicilia CT 15 3215 44068
Linguaglossa CT 16 5403 49471
Floresta ME 17 485 49956
Francavilla di Sicilia ME 17 3945 53901
Milo CT 19 1087 54988
Sant'Alfio CT 20 1582 56570
Piedimonte Etneo CT 20 3963 60533
Motta Camastra ME 20 845 61378

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Acireale (52622 inhabitants)
39 Km N of Catania (314555 inhabitants)
65 Km SW of Messina (238439 inhabitants)
67 Km W of Reggio di Calabria (183035 inhabitants)
88 Km E of Caltanissetta (63360 inhabitants)
92 Km NW of Siracusa (122291 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 2021-10-07
09:13:43		 37.8425 14.96 30 2022-03-30
13:04:10		 Bollettino Sismico Italiano INGV 96429931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-07 09:13:43 ± 0.14
Latitude 37.8425 ± 0.0063
Longitude 14.9600 ± 0.0068
Depth (km) 30 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96429931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 671
Semi-minor axis of confidence ellipse (meter) 521
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 205
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 25
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) 0.43347
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96429931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-12-17 14:33:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-10-07T09:14:08.56 3.0 undecidable manual Sn -0.03 0
IV.MSFR.HHZ. 2021-10-07T09:13:58.30 0.3 undecidable manual S 303 38.628 123 0.18 69
IV.MUCR.HHZ. 2021-10-07T09:13:55.02 0.3 undecidable manual S 341 23.4543 139 -0.04 73
IV.ECBD.HHN. 2021-10-07T09:13:53.89 0.3 undecidable manual S 122 13.0758 155 0.38 69
IV.EPZF.HHZ. 2021-10-07T09:13:53.11 0.3 undecidable manual S 257 9.2796 161 -0.02 74
IV.EMNR.HHZ. 2021-10-07T09:13:53.12 0.3 undecidable manual S 116 6.4935 167 0.19 73
IV.ESVO.HHE. 2021-10-07T09:13:53.07 0.3 undecidable manual S 188 7.7811 164 0.05 75
IV.ECZM.HHN. 2021-10-07T09:13:53.36 0.6 undecidable manual S 202 13.2756 154 -0.18 47
IV.ECTS.HHZ. 2021-10-07T09:13:53.30 0.3 undecidable manual S 73 14.7741 152 -0.42 68
IV.MPNC.HHN. 2021-10-07T09:13:53.80 0.6 undecidable manual P 45 48.1185 117 0.48 42
IV.EPIT.HHZ. 2021-10-07T09:13:53.40 0.3 undecidable manual S 112 9.1797 162 0.28 71
IV.EMSG.HHZ. 2021-10-07T09:13:52.68 0.3 undecidable manual S 200 2.5974 175 -0.08 74
IV.MSFR.HHZ. 2021-10-07T09:13:52.14 0.1 undecidable manual P 303 38.628 123 0.09 93
IV.MUCR.HHZ. 2021-10-07T09:13:50.04 0.3 undecidable manual P 341 23.4543 139 -0.24 70
IV.ECTS.HHZ. 2021-10-07T09:13:49.18 0.6 undecidable manual P 73 14.7741 152 -0.33 46
IV.ESAL.HHE. 2021-10-07T09:13:49.58 0.3 undecidable manual P 122 18.0708 146 -0.19 71
IV.EPDN.HHZ. 2021-10-07T09:13:49.36 0.6 undecidable manual P 150 9.879 160 0.16 48
IV.EPIT.HHZ. 2021-10-07T09:13:49.19 0.1 undecidable manual P 112 9.1797 162 0.03 100
IV.ECPN.HHZ. 2021-10-07T09:13:49.31 0.6 undecidable manual P 168 11.1777 158 0.04 50
IV.ECBD.HHN. 2021-10-07T09:13:49.33 0.3 undecidable manual P 122 13.0758 155 -0.06 74
IV.EMFO.HHE. 2021-10-07T09:13:49.79 0.3 undecidable manual P 136 16.4724 149 0.15 72
IV.EMNR.HHZ. 2021-10-07T09:13:49.08 0.1 undecidable manual P 116 6.4935 167 0.03 100
IV.ESVO.HHE. 2021-10-07T09:13:49.25 0.3 undecidable manual P 188 7.7811 164 0.15 73
IV.ECZM.HHN. 2021-10-07T09:13:49.24 0.3 undecidable manual P 202 13.2756 154 -0.16 72
IV.EPZF.HHZ. 2021-10-07T09:13:48.89 0.1 undecidable manual P 257 9.2796 161 -0.28 94
IV.EMSG.HHZ. 2021-10-07T09:13:48.89 0.6 undecidable manual P 200 2.5974 175 -0.06 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHE. ML:1.5 0.00016390654999999998 0.16 AML other m 2021-10-07T09:13:52.71
IV.ECTS.HHN. ML:0.0 0.0003005 0.32 AML other m 2021-10-07T09:13:53.57
IV.EMSG.HHN. ML:1.7 0.0002285567 1.44 AML other m 2021-10-07T09:13:53.02
IV.EPZF.HHN. ML:0.0 0.0002153076 0.4032 AML other m 2021-10-07T09:13:53.69
IV.ECTS.HHE. ML:0.0 0.00008510425000000001 0.16 AML other m 2021-10-07T09:13:53.36
IV.MUCR.HHN. ML:1.5 0.00012490218 0.2752 AML other m 2021-10-07T09:13:55.52
IV.EPZF.HHE. ML:0.0 0.00010632851 0.256 AML other m 2021-10-07T09:13:53.44
IV.MUCR.HHE. ML:1.3 0.000079650395 1.0624 AML other m 2021-10-07T09:14:00.14
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