Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 17-08-2023 and time 19:34:17 (Italy) in region 3 km N San Teodoro (ME)

A magnitude ML 2.1 earthquake occured in region: 3 km N San Teodoro (ME), on

  • 17-08-2023 17:34:17 (UTC)
  • 17-08-2023 19:34:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8790, 14.6930 at 9 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
San Teodoro ME 3 1403 1403
Cesarò ME 4 2439 3842
Maniace CT 10 3765 7607
Troina EN 13 9373 16980
Bronte CT 16 19172 36152
Alcara li Fusi ME 16 1980 38132
Maletto CT 16 3920 42052
San Fratello ME 17 3707 45759
Longi ME 17 1473 47232
Cerami EN 18 2006 49238
Galati Mamertino ME 19 2627 51865
Militello Rosmarino ME 19 1324 53189
Capizzi ME 19 3176 56365

Municipalities with at least 50000 inhabitants

An earthquake occurred to
51 Km NW of Acireale (52622 inhabitants)
54 Km NW of Catania (314555 inhabitants)
70 Km NE of Caltanissetta (63360 inhabitants)
83 Km W of Messina (238439 inhabitants)
87 Km W of Reggio di Calabria (183035 inhabitants)
98 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
Bulletin
Rev1000 		ML 2.1 2023-08-17
17:34:17		 37.8793 14.6933 9 2024-09-10
16:44:30		 Bollettino Sismico Italiano INGV 131208321
Reviewed
Rev200 		ML 2.0 2023-08-17
17:34:16		 37.863 14.712 12 2024-09-04
15:01:11		 Sala Operativa INGV_OE (Catania) 120229171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-17 17:34:17 ± 0.11
Latitude 37.8793 ± 0.0063
Longitude 14.6933 ± 0.0080
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 131208321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 726
Semi-minor axis of confidence ellipse (meter) 273
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 68
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) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.14029
Epicentral distance of station farthest from the epicenter (degree) 0.84356
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 131208321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-09-04 15:00:53

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 120229171
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2023-08-17 17:46:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MRCB.HHZ. 2023-08-17T17:34:33.01 0.3 undecidable manual P 70 93.6396 50 -0.28 63
IV.NOV.HHZ. 2023-08-17T17:34:31.95 0.6 undecidable manual S 67 42.1245 50 0.6 43
IV.GIB.HHE. 2023-08-17T17:34:28.78 0.3 undecidable manual P 282 59.6958 50 0.72 59
IV.CSLB.HHZ. 2023-08-17T17:34:27.34 0.3 undecidable manual P 277 55.9995 50 -0.15 70
IV.HLNI.HHZ. 2023-08-17T17:34:27.89 0.3 undecidable manual P 165 60.8946 50 -0.37 66
IV.MUCR.HHZ. 2023-08-17T17:34:26.14 0.6 undecidable manual S 41 24.0537 110 0.08 50
IV.ECZM.HHN. 2023-08-17T17:34:26.63 0.6 undecidable manual S 132 24.753 110 0.35 47
IV.EPMN.HHZ. 2023-08-17T17:34:25.56 0.3 undecidable manual P 99 42.9237 50 0.09 72
IV.GALF.HHE. 2023-08-17T17:34:25.66 0.6 undecidable manual S 211 21.7671 112 0.34 47
IV.EMPL.HHE. 2023-08-17T17:34:24.35 0.6 undecidable manual P 132 32.9448 50 0.41 46
IV.EPZF.HHZ. 2023-08-17T17:34:24.45 0.6 undecidable manual S 113 15.5733 120 1.06 37
IV.NOV.HHZ. 2023-08-17T17:34:24.62 0.1 undecidable manual P 67 42.1245 50 -0.74 80
IV.ESLN.HHZ. 2023-08-17T17:34:24.10 0.3 undecidable manual P 130 32.1456 50 0.29 71
IV.ECHR.HHE. 2023-08-17T17:34:23.25 0.3 undecidable manual P 138 28.749 107 0.05 75
IV.ESCV.HHE. 2023-08-17T17:34:23.80 0.6 undecidable manual S 144 18.1707 116 -0.38 47
IV.MSFR.HHZ. 2023-08-17T17:34:23.91 0.6 undecidable manual S 333 19.3695 115 -0.63 44
IV.ECZM.HHN. 2023-08-17T17:34:22.08 0.1 undecidable manual P 132 24.753 110 -0.35 94
IV.MUCR.HHZ. 2023-08-17T17:34:22.24 0.1 positive manual P 41 24.0537 110 -0.06 100
IV.ESVO.HHZ. 2023-08-17T17:34:22.50 0.3 undecidable manual P 118 25.1526 109 -0.01 76
IV.GALF.HHE. 2023-08-17T17:34:21.75 0.1 undecidable manual P 211 21.7671 112 -0.12 99
IV.MSFR.HHZ. 2023-08-17T17:34:21.86 0.1 undecidable manual P 333 19.3695 115 0.44 93
IV.EPZF.HHZ. 2023-08-17T17:34:20.96 0.1 negative manual P 113 15.5733 120 0.2 99
IV.ESCV.HHE. 2023-08-17T17:34:20.74 0.1 negative manual P 144 18.1707 116 -0.47 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPZF.HHE. ML:2.3 0.0017800000000000001 1.02 AML other m 2023-08-17T17:34:24.48
IV.EPZF.HNN. ML:2.4 0.002175 0.32 AML other m 2023-08-17T17:34:25.00
IV.EPZF.HHN. ML:2.3 0.002045 0.3 AML other m 2023-08-17T17:34:25.02
IV.EPZF.HNE. ML:2.2 0.0017250000000000002 0.38 AML other m 2023-08-17T17:34:25.46
IV.ESCV.HHN. ML:2.4 0.00189 1.8 AML other m 2023-08-17T17:34:26.06
IV.MUCR.HHN. ML:2.0 0.0005735 0.46 AML other m 2023-08-17T17:34:27.46
IV.MUCR.HHE. ML:1.9 0.00047750000000000006 0.46 AML other m 2023-08-17T17:34:27.46
IV.GALF.HHE. ML:2.3 0.0014849999999999998 0.42 AML other m 2023-08-17T17:34:27.54
IV.ESCV.HHE. ML:2.3 0.001735 0.86 AML other m 2023-08-17T17:34:28.66
IV.GALF.HNE. ML:2.0 0.0007384999999999999 0.42 AML other m 2023-08-17T17:34:28.54
IV.GALF.HHN. ML:2.2 0.0009985 0.86 AML other m 2023-08-17T17:34:28.47
IV.GALF.HNN. ML:1.9 0.0005669999999999999 0.28 AML other m 2023-08-17T17:34:29.15
IV.ESVO.HHN. ML:2.4 0.0016699999999999998 1.26 AML other m 2023-08-17T17:34:32.71
IV.NOV.HHN. ML:1.7 0.00016700000000000002 0.24 AML other m 2023-08-17T17:34:32.61
IV.NOV.HNN. ML:1.1 0.000046899999999999995 1.3 AML other m 2023-08-17T17:34:32.09
IV.NOV.HHE. ML:1.8 0.0002305 0.74 AML other m 2023-08-17T17:34:33.77
IV.NOV.HNE. ML:1.3 0.00006850000000000001 0.4 AML other m 2023-08-17T17:34:33.97
IV.EPMN.HHN. ML:1.9 0.000235 0.9 AML other m 2023-08-17T17:34:35.57
IV.EPMN.HHE. ML:1.9 0.00023999999999999998 1.66 AML other m 2023-08-17T17:34:35.12
IV.ESVO.HHE. ML:2.3 0.001252 0.84 AML other m 2023-08-17T17:34:36.09
IV.SSY.HHE. ML:1.7 0.000059 1.14 AML other m 2023-08-17T17:34:47.20
IV.SSY.HHN. ML:1.9 0.0001032 1.46 AML other m 2023-08-17T17:34:47.21
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
Waveforms Seismic signals in miniseed + resp format Download