Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-07-2023 and time 00:45:31 (Italy) in region 4 km S Maniace (CT)

A magnitude ML 1.6 earthquake occured in region: 4 km S Maniace (CT), on

  • 27-07-2023 22:45:31 (UTC)
  • 28-07-2023 00:45:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8300, 14.8160 at 34 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Maniace CT 4 3765 3765
Maletto CT 4 3920 7685
Bronte CT 5 19172 26857
Cesarò ME 9 2439 29296
San Teodoro ME 10 1403 30699
Randazzo CT 13 10900 41599
Santa Domenica Vittoria ME 16 980 42579
Adrano CT 19 36122 78701
Floresta ME 19 485 79186
Troina EN 20 9373 88559

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of Acireale (52622 inhabitants)
44 Km NW of Catania (314555 inhabitants)
76 Km NE of Caltanissetta (63360 inhabitants)
77 Km SW of Messina (238439 inhabitants)
79 Km W of Reggio di Calabria (183035 inhabitants)
95 Km NW of Siracusa (122291 inhabitants)
99 Km NE of Gela (75827 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
Reviewed
Rev100 		ML 1.6 2023-07-27
22:45:31		 37.8305 14.8165 34 2023-07-27
23:15:11		 Sala Sismica INGV-Roma 119637061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-27 22:45:31 ± 0.23
Latitude 37.8305 ± 0.0081
Longitude 14.8165 ± 0.0205
Depth (km) 34 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 119637061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1730
Semi-minor axis of confidence ellipse (meter) 655
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 1730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.03238
Epicentral distance of station farthest from the epicenter (degree) 0.90382
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 119637061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-07-27 23:15:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2023-07-27T22:45:55.36 0.6 undecidable manual S 163 77.9664 109 -0.09 46
IV.HLNI.HHZ. 2023-07-27T22:45:49.27 0.6 undecidable manual S 175 53.7018 118 -0.23 47
IV.HAVL.HHZ. 2023-07-27T22:45:48.07 1.0 positive manual P 164 100.3218 54 -0.03 22
IV.SSY.HHZ. 2023-07-27T22:45:45.08 0.3 negative manual P 163 77.9664 109 -0.09 69
IV.MSFR.HHE. 2023-07-27T22:45:44.46 0.6 undecidable manual S 319 29.9478 136 0.08 50
IV.MUCR.HHZ. 2023-07-27T22:45:43.02 0.3 undecidable manual S 12 24.0537 142 -0.32 72
IV.LIBRI.HHE. 2023-07-27T22:45:43.76 0.6 undecidable manual S 19 29.748 136 -0.58 44
IV.EMSG.HHZ. 2023-07-27T22:45:42.73 0.6 undecidable manual S 95 11.7771 160 1 38
IV.HLNI.HHZ. 2023-07-27T22:45:41.45 0.3 undecidable manual P 175 53.7018 118 -0.28 69
IV.EPZF.HHZ. 2023-07-27T22:45:41.26 0.6 undecidable manual S 101 3.5964 173 0.04 53
IV.LIBRI.HHE. 2023-07-27T22:45:39.06 0.1 undecidable manual P 19 29.748 136 0.31 96
IV.MSFR.HHE. 2023-07-27T22:45:38.88 0.1 undecidable manual P 319 29.9478 136 0.11 100
IV.MUCR.HHZ. 2023-07-27T22:45:38.26 0.3 undecidable manual P 12 24.0537 142 0.08 76
IV.GALF.HHZ. 2023-07-27T22:45:38.67 0.6 positive manual P 239 25.6521 140 0.35 48
IV.ESML.HHE. 2023-07-27T22:45:38.49 0.1 undecidable manual P 167 24.1536 142 0.31 97
IV.EMSG.HHZ. 2023-07-27T22:45:37.40 0.3 negative manual P 95 11.7771 160 0.16 76
IV.ESVO.HHE. 2023-07-27T22:45:37.61 0.1 undecidable manual P 119 13.0758 157 0.29 99
IV.EPZF.HHZ. 2023-07-27T22:45:36.77 0.3 positive manual P 101 3.5964 173 -0.17 77
IV.ESCV.HHE. 2023-07-27T22:45:36.72 0.1 undecidable manual P 181 9.2796 164 -0.4 97
IV.ECZM.HHE. 2023-07-27T22:45:36.97 0.1 undecidable manual P 145 13.3755 157 -0.37 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MUCR.HHE. ML:1.7 0.0001715 0.52 AML other m 2023-07-27T22:45:43.58
IV.MUCR.HHN. ML:1.3 0.00007159999999999999 0.46 AML other m 2023-07-27T22:45:43.40
IV.EPZF.HHE. ML:1.6 0.000154 0.52 AML other m 2023-07-27T22:45:43.49
IV.EPZF.HHN. ML:1.9 0.00032 0.72 AML other m 2023-07-27T22:45:43.52
IV.GALF.HHE. ML:1.7 0.000154 0.58 AML other m 2023-07-27T22:45:45.37
IV.GALF.HHN. ML:1.6 0.000118 0.66 AML other m 2023-07-27T22:45:46.35
IV.HLNI.HHN. ML:1.4 0.000049250000000000004 0.5 AML other m 2023-07-27T22:45:49.48
IV.HLNI.HHE. ML:1.5 0.0000538 0.7 AML other m 2023-07-27T22:45:50.57
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