Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 23-07-2023 and time 15:01:07 (UTC) in region 11 km N Ragalna (CT)

A magnitude ML 1.4 earthquake occured in region: 11 km N Ragalna (CT), on

  • 23-07-2023 15:01:07 (UTC)
  • 23-07-2023 17:01:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7280, 14.9370 at 10 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
Ragalna CT 11 3924 3924
Biancavilla CT 11 24007 27931
Bronte CT 11 19172 47103
Adrano CT 12 36122 83225
Maletto CT 13 3920 87145
Santa Maria di Licodia CT 13 7641 94786
Nicolosi CT 15 7463 102249
Zafferana Etnea CT 15 9517 111766
Belpasso CT 16 28108 139874
Milo CT 16 1087 140961
Pedara CT 16 14102 155063
Randazzo CT 17 10900 165963
Paternò CT 17 48228 214191
Trecastagni CT 18 10910 225101
Sant'Alfio CT 18 1582 226683
Santa Venerina CT 18 8592 235275
Maniace CT 19 3765 239040
Camporotondo Etneo CT 19 5023 244063
San Pietro Clarenza CT 19 7743 251806
Viagrande CT 19 8563 260369
Mascalucia CT 20 31958 292327

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NW of Acireale (52622 inhabitants)
28 Km NW of Catania (314555 inhabitants)
75 Km SW of Messina (238439 inhabitants)
75 Km SW of Reggio di Calabria (183035 inhabitants)
81 Km NW of Siracusa (122291 inhabitants)
81 Km E of Caltanissetta (63360 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
95 Km NE of Gela (75827 inhabitants)
98 Km N of Modica (54633 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 1.4 2023-07-23
15:01:07		 37.7285 14.9367 10 2024-09-10
16:44:29		 Bollettino Sismico Italiano INGV 129093541
Reviewed
Rev200 		ML 1.2 2023-07-23
15:01:07		 37.731 14.952 5 2024-06-20
15:35:56		 Sala Operativa INGV_OE (Catania) 119505781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-07-23 15:01:07 ± 0.1
Latitude 37.7285 ± 0.0045
Longitude 14.9367 ± 0.0091
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 129093541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 778
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.78241
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 129093541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-06-20 15:35:41

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 119505781
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2023-07-23 15:09:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2023-07-23T15:01:22.55 0.3 undecidable manual P 169 86.8464 50 -0.09 64
IV.SSY.HHZ. 2023-07-23T15:01:20.01 0.6 undecidable manual P 169 64.491 50 0.83 36
IV.MUCR.HHZ. 2023-07-23T15:01:14.66 0.3 undecidable manual P 351 35.3424 50 -0.04 71
IV.EMSG.HHZ. 2023-07-23T15:01:12.86 0.6 undecidable manual S 6 10.2786 133 0.35 46
IV.EPOZ.HHZ. 2023-07-23T15:01:12.72 0.3 undecidable manual P 106 22.9548 113 0.1 72
IV.ESPC.HHN. 2023-07-23T15:01:11.83 0.6 undecidable manual S 117 8.88 137 -0.34 47
IV.EMFS.HHZ. 2023-07-23T15:01:11.86 0.6 undecidable manual S 100 5.4945 150 0.41 46
IV.ESLN.HHZ. 2023-07-23T15:01:11.80 0.6 undecidable manual S 140 5.0949 152 0.41 46
IV.ESML.HHZ. 2023-07-23T15:01:11.14 0.1 undecidable manual P 202 13.2756 126 0.23 95
IV.ESVO.HHZ. 2023-07-23T15:01:11.92 0.6 undecidable manual S 10 4.995 152 0.54 45
IV.EMSG.HHZ. 2023-07-23T15:01:10.38 0.1 positive manual P 6 10.2786 133 -0.07 98
IV.ECZM.HHN. 2023-07-23T15:01:10.98 0.6 undecidable manual S 276 2.8971 163 -0.12 49
IV.EPZF.HHZ. 2023-07-23T15:01:10.66 0.1 undecidable manual P 327 12.6762 127 -0.16 96
IV.EMNR.HHZ. 2023-07-23T15:01:10.85 0.1 undecidable manual P 39 12.5763 127 0.06 98
IV.ECHR.HHE. 2023-07-23T15:01:09.88 0.1 undecidable manual P 204 5.0949 152 0.07 99
IV.ESVO.HHZ. 2023-07-23T15:01:09.76 0.1 negative manual P 10 4.995 152 -0.04 100
IV.ESPC.HHN. 2023-07-23T15:01:09.84 0.1 undecidable manual P 117 8.88 137 -0.41 92
IV.EMFS.HHZ. 2023-07-23T15:01:09.76 0.1 undecidable manual P 100 5.4945 150 -0.08 99
IV.ESLN.HHZ. 2023-07-23T15:01:09.65 0.1 undecidable manual P 140 5.0949 152 -0.16 98
IV.EMPL.HHZ. 2023-07-23T15:01:09.82 0.1 undecidable manual P 152 6.1938 147 -0.1 99
IV.ECZM.HHN. 2023-07-23T15:01:09.41 0.1 undecidable manual P 276 2.8971 163 -0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHN. ML:1.9 0.0010725 0.16 AML other m 2023-07-23T15:01:13.69
IV.EMSG.HHE. ML:1.8 0.000751 0.16 AML other m 2023-07-23T15:01:17.07
IV.EPZF.HHN. ML:1.4 0.00028599999999999996 0.6 AML other m 2023-07-23T15:01:18.17
IV.EPZF.HHE. ML:1.4 0.0002465 1.12 AML other m 2023-07-23T15:01:18.98
IV.ESML.HHE. ML:1.4 0.000241 0.46 AML other m 2023-07-23T15:01:19.18
IV.ESML.HHN. ML:1.5 0.00032299999999999994 0.42 AML other m 2023-07-23T15:01:20.32
IV.MUCR.HHE. ML:1.1 0.0000477 0.4 AML other m 2023-07-23T15:01:28.59
IV.MUCR.HHN. ML:1.0 0.000043450000000000006 1.14 AML other m 2023-07-23T15:01:29.09
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