Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 30-08-2023 and time 16:45:49 (UTC) in region 10 km SE Maletto (CT)

A magnitude ML 1.9 earthquake occured in region: 10 km SE Maletto (CT), on

  • 30-08-2023 16:45:49 (UTC)
  • 30-08-2023 18:45:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7870, 14.9630 at 29 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
Maletto CT 10 3920 3920
Randazzo CT 10 10900 14820
Bronte CT 11 19172 33992
Santa Domenica Vittoria ME 14 980 34972
Moio Alcantara ME 15 717 35689
Milo CT 15 1087 36776
Maniace CT 16 3765 40541
Zafferana Etnea CT 16 9517 50058
Sant'Alfio CT 17 1582 51640
Roccella Valdemone ME 17 666 52306
Malvagna ME 17 733 53039
Linguaglossa CT 17 5403 58442
Ragalna CT 17 3924 62366
Castiglione di Sicilia CT 18 3215 65581
Adrano CT 18 36122 101703
Biancavilla CT 18 24007 125710
Santa Venerina CT 19 8592 134302
Piedimonte Etneo CT 19 3963 138265
Nicolosi CT 20 7463 145728
Francavilla di Sicilia ME 20 3945 149673
Santa Maria di Licodia CT 20 7641 157314

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Acireale (52622 inhabitants)
33 Km NW of Catania (314555 inhabitants)
69 Km SW of Messina (238439 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
86 Km E of Caltanissetta (63360 inhabitants)
86 Km NW of Siracusa (122291 inhabitants)
98 Km N of Ragusa (73313 inhabitants)
100 Km NE of Vittoria (63339 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 1.9 2023-08-30
16:45:49		 37.7868 14.9627 29 2024-09-10
16:44:19		 Bollettino Sismico Italiano INGV 121609921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-30 16:45:49 ± 0.17
Latitude 37.7868 ± 0.0063
Longitude 14.9627 ± 0.0102
Depth (km) 29 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 121609921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 939
Semi-minor axis of confidence ellipse (meter) 365
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 290
Circular confidence region, given by single value of horizontal uncertainty (meter) 940.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.44426
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 121609921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-09-10 15:27:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2023-08-30T16:46:06.02 0.6 undecidable manual S 189 49.3173 115 0.06 47
IV.LIBRI.HNZ. 2023-08-30T16:46:02.29 0.6 undecidable manual S 355 33.0447 126 0.07 48
IV.NOV.HNZ. 2023-08-30T16:46:01.76 0.6 undecidable manual S 30 30.747 128 0.04 49
IV.MUCR.HHZ. 2023-08-30T16:46:01.32 0.6 undecidable manual S 345 29.4483 130 -0.14 48
IV.ESCV.HHZ. 2023-08-30T16:45:59.34 0.6 undecidable manual S 251 13.6752 152 0.58 44
IV.ECTS.HHZ. 2023-08-30T16:45:59.14 0.6 undecidable manual S 53 17.4714 146 -0.14 48
IV.EPMN.HHZ. 2023-08-30T16:45:59.76 0.6 undecidable manual S 79 19.1697 143 0.21 48
IV.EPZF.HHZ. 2023-08-30T16:45:58.58 0.3 undecidable manual S 294 10.1787 159 0.22 73
IV.HLNI.HHZ. 2023-08-30T16:45:58.99 0.3 undecidable manual P 189 49.3173 115 0.07 70
IV.EMSG.HHZ. 2023-08-30T16:45:57.95 0.3 undecidable manual S 343 3.8961 171 0.02 77
IV.EMNR.HHZ. 2023-08-30T16:45:57.88 0.6 undecidable manual S 59 6.4935 166 -0.19 49
IV.ESPC.HHZ. 2023-08-30T16:45:57.93 0.3 undecidable manual S 151 11.877 155 -0.62 65
IV.LIBRI.HNZ. 2023-08-30T16:45:56.35 0.3 undecidable manual P 355 33.0447 126 -0.4 68
IV.MUCR.HHZ. 2023-08-30T16:45:56.23 0.3 undecidable manual P 345 29.4483 130 -0.08 73
IV.NOV.HNZ. 2023-08-30T16:45:56.55 0.1 undecidable manual P 30 30.747 128 0.08 96
IV.EMCN.HHN. 2023-08-30T16:45:55.01 0.3 undecidable manual P 85 6.1938 167 0.66 65
IV.ECTS.HHZ. 2023-08-30T16:45:55.10 0.3 undecidable manual P 53 17.4714 146 0.05 74
IV.EPMN.HHZ. 2023-08-30T16:45:55.27 0.3 undecidable manual P 79 19.1697 143 0.06 74
IV.ECBD.HHZ. 2023-08-30T16:45:54.89 0.3 undecidable manual P 94 10.878 157 0.32 71
IV.ESPC.HHZ. 2023-08-30T16:45:54.32 0.1 undecidable manual P 151 11.877 155 -0.31 95
IV.ESVO.HHE. 2023-08-30T16:45:54.41 0.3 undecidable manual P 222 2.0979 176 0.16 75
IV.ESCV.HHZ. 2023-08-30T16:45:54.38 0.6 undecidable manual P 251 13.6752 152 -0.38 47
IV.EPZF.HHZ. 2023-08-30T16:45:54.37 0.3 undecidable manual P 294 10.1787 159 -0.16 74
IV.EMSG.HHZ. 2023-08-30T16:45:54.15 0.1 undecidable manual P 343 3.8961 171 -0.13 100
IV.EMNR.HHZ. 2023-08-30T16:45:54.52 0.1 undecidable manual P 59 6.4935 166 0.16 99
IV.EMFO.HHE. 2023-08-30T16:45:54.61 0.3 undecidable manual P 117 12.5763 154 -0.07 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHN. ML:2.3 0.0011658676500000001 0.4608 AML other m 2023-08-30T16:45:58.30
IV.EMSG.HHE. ML:2.4 0.0012931575 0.768 AML other m 2023-08-30T16:45:58.04
IV.EPZF.HHE. ML:1.7 0.000263 0.38 AML other m 2023-08-30T16:45:58.93
IV.EPZF.HHN. ML:1.9 0.0004055 0.72 AML other m 2023-08-30T16:45:59.92
IV.HLNI.HHN. ML:1.6 0.00009005 1.18 AML other m 2023-08-30T16:46:06.05
IV.HLNI.HHE. ML:1.4 0.0000546 0.12 AML other m 2023-08-30T16:46:06.58
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