Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 11-04-2023 and time 10:46:36 (UTC) in region Mar Ionio Meridionale (MARE)

A magnitude ML 2.1 earthquake occured in region: Mar Ionio Meridionale (MARE), on

  • 11-04-2023 10:46:36 (UTC)
  • 11-04-2023 12:46:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.1010, 16.1410 at 31 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
75 Km E of Siracusa (122291 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 2023-04-11
10:46:36		 37.1013 16.1412 31 2024-03-01
17:18:10		 Bollettino Sismico Italiano INGV 117923871
Reviewed
Rev100 		ML 2.1 2023-04-11
10:46:35		 37.2005 16.1815 10 2023-04-11
10:56:12		 Sala Sismica INGV-Roma 116275391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-11 10:46:36 ± 0.14
Latitude 37.1013 ± 0.0081
Longitude 16.1412 ± 0.0090
Depth (km) 31 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117923871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1019
Semi-minor axis of confidence ellipse (meter) 196
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 323
Circular confidence region, given by single value of horizontal uncertainty (meter) 1020.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 253
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.80579
Epicentral distance of station farthest from the epicenter (degree) 1.09268
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 116275391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-11 10:56:12

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 117923871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-22 12:42:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HMDC.HHZ. 2023-04-11T10:47:11.36 0.6 undecidable manual S 263 121.2897 54 0.34 46
IV.HLNI.HHZ. 2023-04-11T10:47:09.49 0.3 undecidable manual S 284 115.3956 54 -0.26 72
IV.HCRL.HHN. 2023-04-11T10:47:06.14 0.6 undecidable manual S 282 100.0221 103 -0.12 51
IV.MPAZ.HNE. 2023-04-11T10:47:05.37 0.6 undecidable manual S 353 95.238 103 0.35 49
IV.SSY.HHZ. 2023-04-11T10:47:05.27 0.6 undecidable manual S 274 94.6386 104 0.41 48
IV.HAVL.HHZ. 2023-04-11T10:47:04.06 0.6 undecidable manual S 260 91.6416 104 -0.02 53
IV.HAGA.HHE. 2023-04-11T10:47:03.12 0.6 undecidable manual S 283 89.4438 104 -0.41 49
IV.HMDC.HHZ. 2023-04-11T10:46:56.56 0.1 undecidable manual P 263 121.2897 54 0.12 97
IV.HLNI.HHZ. 2023-04-11T10:46:55.68 0.1 undecidable manual P 284 115.3956 54 -0.02 100
IV.HPAC.HHE. 2023-04-11T10:46:54.62 0.3 undecidable manual P 246 107.2149 54 -0.06 76
IV.HCRL.HHN. 2023-04-11T10:46:53.71 0.6 undecidable manual P 282 100.0221 103 0.02 52
IV.SSY.HHZ. 2023-04-11T10:46:52.87 0.3 undecidable manual P 274 94.6386 104 -0.01 79
IV.HAGA.HHE. 2023-04-11T10:46:52.03 0.3 undecidable manual P 283 89.4438 104 -0.08 78
IV.MPAZ.HNE. 2023-04-11T10:46:52.85 0.3 undecidable manual P 353 95.238 103 -0.12 76
IV.HAVL.HHZ. 2023-04-11T10:46:52.49 0.3 undecidable manual P 260 91.6416 104 0.06 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSY.HHE. ML:1.8 0.000060936599999999995 0.1408 AML other m 2023-04-11T10:47:07.80
IV.HAVL.HHE. ML:2.0 0.00011533615500000001 0.1792 AML other m 2023-04-11T10:47:10.24
IV.HLNI.HHE. ML:2.2 0.00011410991999999998 0.2368 AML other m 2023-04-11T10:47:10.70
IV.HLNI.HNN. ML:2.2 0.000127528785 0.1216 AML other m 2023-04-11T10:47:10.90
IV.HLNI.HHN. ML:2.2 0.000132284 0.1216 AML other m 2023-04-11T10:47:10.96
IV.HAVL.HHN. ML:2.1 0.000124911595 1.7568 AML other m 2023-04-11T10:47:10.02
IV.HMDC.HNE. ML:2.4 0.00015685995 0.2816 AML other m 2023-04-11T10:47:12.18
IV.HMDC.HHE. ML:1.6 0.000031678385 0.1408 AML other m 2023-04-11T10:47:12.17
IV.HMDC.HHN. ML:2.2 0.00010889252000000001 1.8592 AML other m 2023-04-11T10:47:13.94
IV.SSY.HHN. ML:2.2 0.00016967340000000001 0.2432 AML other m 2023-04-11T10:47:13.05
IV.SSY.HNE. ML:2.1 0.000132431575 0.2048 AML other m 2023-04-11T10:47:13.18
IV.SSY.HNN. ML:2.1 0.00013368916 0.2624 AML other m 2023-04-11T10:47:13.06
IV.HLNI.HNE. ML:2.1 0.00010038982000000001 1.2608 AML other m 2023-04-11T10:47:28.76
IV.HMDC.HNN. ML:2.4 0.00018322795 0.8 AML other m 2023-04-11T10:47:29.12
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
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