Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 23-12-2021 and time 22:55:56 (UTC) in region 10 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.3 earthquake occured in region: 10 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 22:55:56 (UTC)
  • 23-12-2021 23:55:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4420, 14.8960 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
Motta Sant'Anastasia CT 10 12116 12116
Misterbianco CT 13 49410 61526
Paternò CT 15 48228 109754
Scordia CT 17 17095 126849
Camporotondo Etneo CT 17 5023 131872
Palagonia CT 18 16608 148480
Belpasso CT 18 28108 176588
Catania CT 18 314555 491143
San Pietro Clarenza CT 19 7743 498886
Ramacca CT 19 10894 509780
Santa Maria di Licodia CT 20 7641 517421
Lentini SR 20 24085 541506
Gravina di Catania CT 20 25838 567344

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Catania (314555 inhabitants)
31 Km SW of Acireale (52622 inhabitants)
55 Km NW of Siracusa (122291 inhabitants)
59 Km N of Ragusa (73313 inhabitants)
63 Km NE of Vittoria (63339 inhabitants)
66 Km N of Modica (54633 inhabitants)
71 Km NE of Gela (75827 inhabitants)
74 Km E of Caltanissetta (63360 inhabitants)
99 Km SW of Reggio di Calabria (183035 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 1.3 2021-12-23
22:55:56		 37.4417 14.8957 10 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102536021
Reviewed
Rev100 		ML 1.3 2021-12-23
22:55:56		 37.4378 14.8908 14 2021-12-23
23:05:33		 Sala Sismica INGV-Roma 98873591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 22:55:56 ± 0.1
Latitude 37.4417 ± 0.0036
Longitude 14.8957 ± 0.0102
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 102536021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 859
Semi-minor axis of confidence ellipse (meter) 34
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
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) 0.09533
Epicentral distance of station farthest from the epicenter (degree) 0.67359
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 102536021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 16:27:21

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 98873591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 23:05:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-12-23T22:56:19.23 0.6 undecidable manual S 179 73.371 50 0.62 40
IV.HVIT.HHZ. 2021-12-23T22:56:14.64 0.6 undecidable manual S 214 59.7957 50 -0.34 45
IV.RAFF.HHZ. 2021-12-23T22:56:14.45 0.6 undecidable manual S 243 52.9026 50 1.3 31
IV.HMDC.HNN. 2021-12-23T22:56:13.86 0.6 undecidable manual S 191 54.4011 50 0.3 46
IV.SSY.HHZ. 2021-12-23T22:56:08.98 0.3 undecidable manual S 153 35.2425 50 0.56 67
IV.ISPIC.EHZ. 2021-12-23T22:56:08.80 0.3 undecidable manual P 179 73.371 50 -0.4 65
IV.CROCE.HHE. 2021-12-23T22:56:08.33 0.3 undecidable manual P 205 74.7696 50 -1.08 49
IV.HVZN.HHZ. 2021-12-23T22:56:07.94 0.3 undecidable manual S 209 33.2445 50 0.04 75
IV.ECHR.HHE. 2021-12-23T22:56:06.91 0.6 undecidable manual S 3 27.1506 50 0.63 44
IV.HAGA.HHZ. 2021-12-23T22:56:06.77 0.3 undecidable manual S 127 28.749 50 0.09 75
IV.ESPC.HHN. 2021-12-23T22:56:06.83 0.6 undecidable manual S 23 30.1476 50 -0.24 48
IV.HVIT.HHZ. 2021-12-23T22:56:06.70 0.3 undecidable manual P 214 59.7957 50 -0.4 67
IV.EMPL.HHZ. 2021-12-23T22:56:06.84 0.6 undecidable manual S 14 27.1506 50 0.58 45
IV.RAFF.HHZ. 2021-12-23T22:56:05.72 0.1 undecidable manual P 243 52.9026 50 -0.34 91
IV.HMDC.HNN. 2021-12-23T22:56:05.64 0.3 undecidable manual P 191 54.4011 50 -0.65 62
IT.LNT.HGZ. 2021-12-23T22:56:04.33 0.6 undecidable manual S 151 19.4694 118 0.38 48
IV.ESVO.HHE. 2021-12-23T22:56:04.08 0.3 undecidable manual P 7 37.0296 50 0.47 68
IV.GALF.HHZ. 2021-12-23T22:56:04.69 0.3 undecidable manual P 316 41.5251 50 0.39 69
IV.ESCV.HHZ. 2021-12-23T22:56:03.34 0.3 undecidable manual P 348 34.6431 50 0.12 74
IV.ECZM.HHN. 2021-12-23T22:56:03.07 0.3 undecidable manual P 1 32.1456 50 0.22 73
IV.ESML.HHZ. 2021-12-23T22:56:03.57 0.6 undecidable manual S 356 19.6692 117 -0.44 47
IV.EMCN.HHN. 2021-12-23T22:56:03.46 0.6 undecidable manual P 17 40.626 50 -0.69 42
IV.EPOZ.HHZ. 2021-12-23T22:56:03.56 0.3 undecidable manual P 45 36.2415 50 0.08 74
IV.SSY.HHZ. 2021-12-23T22:56:03.14 0.1 undecidable manual P 153 35.2425 50 -0.18 97
IV.EMFO.HHE. 2021-12-23T22:56:03.55 0.6 undecidable manual P 28 36.8298 50 -0.02 50
IV.ESPC.HHN. 2021-12-23T22:56:02.04 0.1 undecidable manual P 23 30.1476 50 -0.5 92
IV.HLNI.HHZ. 2021-12-23T22:56:02.26 0.6 undecidable manual S 191 10.5783 134 0.84 41
IV.EMPL.HHZ. 2021-12-23T22:56:02.18 0.3 undecidable manual P 14 27.1506 50 0.1 75
IV.ESLN.HHZ. 2021-12-23T22:56:02.77 0.3 undecidable manual P 14 28.749 50 0.44 70
IV.ECHR.HHE. 2021-12-23T22:56:02.05 0.3 undecidable manual P 3 27.1506 50 -0.04 76
IV.HVZN.HHZ. 2021-12-23T22:56:02.98 0.3 undecidable manual P 209 33.2445 50 -0.04 75
IV.HAGA.HHZ. 2021-12-23T22:56:01.94 0.1 undecidable manual P 127 28.749 50 -0.38 94
IT.LNT.HGZ. 2021-12-23T22:56:00.65 0.3 undecidable manual P 151 19.4694 118 -0.09 76
IV.ESML.HHZ. 2021-12-23T22:56:00.59 0.3 undecidable manual P 356 19.6692 117 -0.18 75
IV.HLNI.HHZ. 2021-12-23T22:55:59.53 0.1 undecidable manual P 191 10.5783 134 0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HNE. ML:1.1 0.00009639685000000001 0.3968 AML other m 2021-12-23T22:56:04.33
IV.ESCV.HHE. ML:1.2 0.0000644601 0.512 AML other m 2021-12-23T22:56:04.35
IV.EPOZ.HHE. ML:1.4 0.0001087187 1.3856 AML other m 2021-12-23T22:56:06.08
IV.ESML.HHE. ML:0.9 0.00006265364 0.2432 AML other m 2021-12-23T22:56:07.23
IV.HAGA.HHN. ML:1.2 0.00007785673 0.2048 AML other m 2021-12-23T22:56:07.27
IV.EMPL.HHN. ML:1.8 0.00033090235 0.2048 AML other m 2021-12-23T22:56:08.21
IV.EMPL.HHE. ML:1.8 0.0003868241 0.2176 AML other m 2021-12-23T22:56:08.56
IV.RAFF.HHN. ML:1.4 0.00005859749 0.6432 AML other m 2021-12-23T22:56:08.77
IV.ESML.HHN. ML:0.9 0.000054382189999999995 1.6928 AML other m 2021-12-23T22:56:08.95
IV.EPOZ.HHN. ML:1.4 0.00009637603 0.4992 AML other m 2021-12-23T22:56:10.50
IV.SSY.HHE. ML:1.5 0.000140793565 0.128 AML other m 2021-12-23T22:56:11.50
IV.ESCV.HHN. ML:1.3 0.00007439581000000001 0.3712 AML other m 2021-12-23T22:56:12.47
IV.SSY.HNE. ML:1.4 0.00009558098500000001 0.2432 AML other m 2021-12-23T22:56:12.37
IV.SSY.HHN. ML:1.9 0.00031075145 0.2432 AML other m 2021-12-23T22:56:12.25
IV.HVZN.HHE. ML:1.4 0.0000945 0.44 AML other m 2021-12-23T22:56:12.25
IV.HVZN.HHN. ML:1.2 0.000074508625 0.5248 AML other m 2021-12-23T22:56:13.97
IV.SSY.HNN. ML:1.4 0.00008874961795 0.32 AML other m 2021-12-23T22:56:14.25
IV.EPOZ.HNE. ML:1.1 0.000045274965 0.0896 AML other m 2021-12-23T22:56:14.74
IV.ESML.HNN. ML:1.2 0.00011362722 1.2192 AML other m 2021-12-23T22:56:21.04
IV.HAGA.HHE. ML:1.1 0.0000656533 1.0912 AML other m 2021-12-23T22:56:22.85
IV.RAFF.HHE. ML:1.4 0.00005828635 1.216 AML other m 2021-12-23T22:56:23.61
IV.EPOZ.HNN. ML:1.1 0.0000427568 0.0128 AML other m 2021-12-23T22:56:30.83
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