Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 12-05-2021 and time 14:41:37 (UTC) in region 9 km E Castel di Iudica (CT)

A magnitude ML 1.9 earthquake occured in region: 9 km E Castel di Iudica (CT), on

  • 12-05-2021 14:41:37 (UTC)
  • 12-05-2021 16:41:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.4700, 14.7430 at 11 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
Castel di Iudica CT 9 4625 4625
Ramacca CT 10 10894 15519
Catenanuova EN 12 4866 20385
Palagonia CT 16 16608 36993
Centuripe EN 17 5470 42463
Paternò CT 19 48228 90691
Raddusa CT 19 3178 93869

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of Catania (314555 inhabitants)
41 Km W of Acireale (52622 inhabitants)
60 Km E of Caltanissetta (63360 inhabitants)
61 Km N of Ragusa (73313 inhabitants)
61 Km N of Vittoria (63339 inhabitants)
63 Km NE of Gela (75827 inhabitants)
67 Km NW of Siracusa (122291 inhabitants)
68 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 1.9 2021-05-12
14:41:37		 37.4703 14.7432 11 2021-12-29
11:12:07		 Bollettino Sismico Italiano INGV 91804801
Reviewed
Rev100 		ML 1.9 2021-05-12
14:41:37		 37.4667 14.7327 10 2021-05-12
14:49:01		 Sala Sismica INGV-Roma 90024771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-12 14:41:37 ± 0.16
Latitude 37.4703 ± 0.0054
Longitude 14.7432 ± 0.0113
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91804801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1005
Semi-minor axis of confidence ellipse (meter) 319
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 1000.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 146
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 14
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.59265
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 91804801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-30 09:09:29

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 90024771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-12 14:49:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FERC.HNZ. 2021-05-12T14:42:03.20 3.0 undecidable manual P -0.06 0
IV.HAVL.HHZ. 2021-05-12T14:41:57.74 3.0 undecidable manual P 65.7897 8.81 0
IV.HAGA.HHZ. 2021-05-12T14:41:51.27 0.3 undecidable manual S 119 41.7249 50 0.29 69
IV.EMSG.HHZ. 2021-05-12T14:41:51.08 0.3 undecidable manual S 25 42.9237 50 -0.22 70
IV.HCRL.HHZ. 2021-05-12T14:41:48.86 0.3 undecidable manual S 129 32.8449 50 0.24 71
IV.HVZN.HHZ. 2021-05-12T14:41:48.85 0.6 undecidable manual S 184 32.4453 50 0.34 46
IT.LNT.HGE. 2021-05-12T14:41:47.76 0.1 undecidable manual S 131 30.4473 50 -0.21 96
IV.SSY.HHZ. 2021-05-12T14:41:45.67 1.0 positive manual P 140 45.3213 50 -0.09 24
IV.EMSG.HHZ. 2021-05-12T14:41:45.77 0.6 undecidable manual P 25 42.9237 50 0.37 45
IV.HAGA.HHZ. 2021-05-12T14:41:45.26 0.6 undecidable manual P 119 41.7249 50 0.05 49
IV.HLNI.HHZ. 2021-05-12T14:41:44.82 0.6 undecidable manual S 140 17.6712 122 0.29 48
IV.GALF.HHZ. 2021-05-12T14:41:43.92 0.6 undecidable manual P 330 30.8469 50 0.38 46
IV.HVZN.HHZ. 2021-05-12T14:41:43.45 0.3 positive manual P 184 32.4453 50 -0.34 70
IT.LNT.HGE. 2021-05-12T14:41:43.28 0.6 undecidable manual P 131 30.4473 50 -0.2 48
IV.HCRL.HHZ. 2021-05-12T14:41:43.64 0.1 undecidable manual P 129 32.8449 50 -0.21 95
IV.HLNI.HHZ. 2021-05-12T14:41:41.38 0.1 negative manual P 140 17.6712 122 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:1.7 0.0004235 1.48 AML other m 2021-05-12T14:41:45.13
IV.HLNI.HHE. ML:1.8 0.0005425 0.96 AML other m 2021-05-12T14:41:45.46
IV.HCRL.HHN. ML:2.0 0.00039049999999999995 1.12 AML other m 2021-05-12T14:41:49.29
IV.HCRL.HHE. ML:2.0 0.00048450000000000007 0.44 AML other m 2021-05-12T14:41:49.11
IV.GALF.HHN. ML:1.9 0.0003935 0.42 AML other m 2021-05-12T14:41:50.46
IV.HAGA.HHN. ML:1.7 0.0001595 0.96 AML other m 2021-05-12T14:41:51.91
IV.HVZN.HNE. ML:1.8 0.00025550000000000003 0.68 AML other m 2021-05-12T14:41:51.44
IV.HVZN.HHE. ML:1.8 0.00027649999999999994 0.7 AML other m 2021-05-12T14:41:51.45
IV.HVZN.HHN. ML:1.8 0.00031 0.42 AML other m 2021-05-12T14:41:51.74
IV.HVZN.HNN. ML:2.0 0.0004645 0.4 AML other m 2021-05-12T14:41:51.74
IV.HAGA.HHE. ML:1.8 0.00021349999999999999 0.6 AML other m 2021-05-12T14:41:51.39
IV.SSY.HHE. ML:2.4 0.0008055000000000001 1.76 AML other m 2021-05-12T14:41:53.01
IV.SSY.HHN. ML:2.7 0.001395 0.24 AML other m 2021-05-12T14:41:53.62
IV.GALF.HHE. ML:1.7 0.0002375 0.48 AML other m 2021-05-12T14:41:54.95
IV.HAVL.HHN. ML:2.1 0.000226 1.04 AML other m 2021-05-12T14:41:59.17
IV.HAVL.HHE. ML:2.1 0.0002475 1.36 AML other m 2021-05-12T14:41:59.16
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