Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 30-03-2023 and time 01:57:10 (Italy) in region 10 km SE Randazzo (CT)

A magnitude ML 1.2 earthquake occured in region: 10 km SE Randazzo (CT), on

  • 29-03-2023 23:57:10 (UTC)
  • 30-03-2023 01:57:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8020, 15.0110 at 5 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 10 10900 10900
Moio Alcantara ME 11 717 11617
Linguaglossa CT 13 5403 17020
Milo CT 13 1087 18107
Maletto CT 13 3920 22027
Sant'Alfio CT 13 1582 23609
Santa Domenica Vittoria ME 13 980 24589
Castiglione di Sicilia CT 13 3215 27804
Malvagna ME 14 733 28537
Zafferana Etnea CT 14 9517 38054
Roccella Valdemone ME 15 666 38720
Piedimonte Etneo CT 15 3963 42683
Bronte CT 16 19172 61855
Francavilla di Sicilia ME 16 3945 65800
Mascali CT 17 14282 80082
Santa Venerina CT 17 8592 88674
Giarre CT 17 27659 116333
Fiumefreddo di Sicilia CT 17 9623 125956
Motta Camastra ME 18 845 126801
Riposto CT 19 14838 141639
Maniace CT 19 3765 145404
Calatabiano CT 19 5308 150712
Gaggi ME 20 3184 153896
Ragalna CT 20 3924 157820

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Acireale (52622 inhabitants)
34 Km N of Catania (314555 inhabitants)
65 Km SW of Messina (238439 inhabitants)
65 Km SW of Reggio di Calabria (183035 inhabitants)
86 Km N of Siracusa (122291 inhabitants)
90 Km E of Caltanissetta (63360 inhabitants)
101 Km N 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 1.2 2023-03-29
23:57:10		 37.8022 15.0112 5 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124343001
Reviewed
Rev200 		ML 1.2 2023-03-29
23:57:09		 37.824 15.021 2 2023-12-29
16:52:02		 Sala Operativa INGV_OE (Catania) 115871281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-29 23:57:10 ± 0.18
Latitude 37.8022 ± 0.0072
Longitude 15.0112 ± 0.0068
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124343001

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 676
Semi-minor axis of confidence ellipse (meter) 472
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
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) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.26350
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 124343001
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-29 16:51:47

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 115871281
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2023-03-30 00:04:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHE. 2023-03-29T23:57:21.59 0.6 undecidable manual S 336 29.2485 99 0.6 42
IV.NOV.HHZ. 2023-03-29T23:57:21.22 0.6 undecidable manual S 24 27.3504 100 0.89 37
IV.MUCR.HHE. 2023-03-29T23:57:16.66 0.1 undecidable manual P 336 29.2485 99 0.01 97
IV.NOV.HHZ. 2023-03-29T23:57:16.17 0.3 undecidable manual P 24 27.3504 100 -0.09 72
IV.EPMN.HHZ. 2023-03-29T23:57:16.57 0.6 undecidable manual S 82 14.6742 108 0.52 44
IV.AIO.HHZ. 2023-03-29T23:57:15.94 0.3 undecidable manual P 46 26.9508 100 -0.25 69
IV.ECTS.HHZ. 2023-03-29T23:57:15.53 0.6 undecidable manual S 47 13.0758 110 0.01 50
IV.ECBD.HHN. 2023-03-29T23:57:14.32 0.6 undecidable manual S 110 7.0929 123 0.69 42
IV.EFIU.HNN. 2023-03-29T23:57:14.58 0.3 undecidable manual P 94 17.4714 105 0.25 71
IV.ECTS.HHZ. 2023-03-29T23:57:13.03 0.1 positive manual P 47 13.0758 110 -0.45 91
IV.EPZF.HHZ. 2023-03-29T23:57:13.43 0.3 undecidable manual P 280 13.6752 109 -0.18 72
IV.ESAL.HHE. 2023-03-29T23:57:13.81 0.3 undecidable manual P 116 11.9769 111 0.53 67
IV.EPMN.HHZ. 2023-03-29T23:57:13.48 0.1 undecidable manual P 82 14.6742 108 -0.32 93
IV.EMSG.HHZ. 2023-03-29T23:57:13.83 0.6 undecidable manual S 291 5.7942 129 0.56 44
IV.EPIT.HHZ. 2023-03-29T23:57:12.89 0.6 undecidable manual S 76 4.0959 138 0.03 50
IV.EMNR.HHZ. 2023-03-29T23:57:12.37 0.6 undecidable manual S 39 2.0979 156 -0.1 50
IV.ESVO.HHE. 2023-03-29T23:57:12.62 0.3 undecidable manual P 240 6.4935 126 0.31 71
IV.EMCN.HHN. 2023-03-29T23:57:12.67 0.6 undecidable manual S 122 2.2977 154 0.17 49
IV.ECBD.HHN. 2023-03-29T23:57:12.35 0.1 undecidable manual P 110 7.0929 123 -0.04 100
IV.EMSG.HHZ. 2023-03-29T23:57:12.04 0.1 positive manual P 291 5.7942 129 -0.15 98
IV.EPIT.HHZ. 2023-03-29T23:57:11.63 0.3 undecidable manual P 76 4.0959 138 -0.31 71
IV.EMNR.HHZ. 2023-03-29T23:57:11.24 0.1 undecidable manual P 39 2.0979 156 -0.48 92
IV.EMCN.HHN. 2023-03-29T23:57:11.50 0.1 undecidable manual P 122 2.2977 154 -0.24 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ECTS.HHE. ML:1.4 0.000301 0.22 AML other m 2023-03-29T23:57:16.70
IV.ECTS.HHN. ML:1.2 0.0002135 0.7 AML other m 2023-03-29T23:57:17.41
IV.EPMN.HHE. ML:1.3 0.00021799999999999999 1.1 AML other m 2023-03-29T23:57:18.36
IV.EPMN.HHN. ML:1.3 0.0002255 1.1 AML other m 2023-03-29T23:57:20.10
IV.AIO.HHE. ML:1.0 0.00006105 1.44 AML other m 2023-03-29T23:57:22.18
IV.AIO.HHN. ML:0.9 0.0000513 0.26 AML other m 2023-03-29T23:57:22.81
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