Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 23-12-2021 and time 22:59:13 (UTC) in region 10 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.5 earthquake occured in region: 10 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 22:59:13 (UTC)
  • 23-12-2021 23:59:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4460, 14.8920 at 13 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
Camporotondo Etneo CT 17 5023 114777
Scordia CT 17 17095 131872
Belpasso CT 18 28108 159980
San Pietro Clarenza CT 18 7743 167723
Palagonia CT 18 16608 184331
Catania CT 18 314555 498886
Ramacca CT 19 10894 509780
Santa Maria di Licodia CT 19 7641 517421
Gravina di Catania CT 20 25838 543259

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Catania (314555 inhabitants)
31 Km SW of Acireale (52622 inhabitants)
56 Km NW of Siracusa (122291 inhabitants)
60 Km N of Ragusa (73313 inhabitants)
64 Km NE of Vittoria (63339 inhabitants)
66 Km N of Modica (54633 inhabitants)
71 Km NE of Gela (75827 inhabitants)
73 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 1.5 2021-12-23
22:59:13		 37.4463 14.8923 13 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102536111
Reviewed
Rev100 		ML 1.7 2021-12-23
22:59:13		 37.4548 14.9067 11 2021-12-23
23:14:33		 Sala Sismica INGV-Roma 98874061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 22:59:13 ± 0.08
Latitude 37.4463 ± 0.0036
Longitude 14.8923 ± 0.0091
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102536111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 798
Semi-minor axis of confidence ellipse (meter) 235
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 100
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.09893
Epicentral distance of station farthest from the epicenter (degree) 0.66550
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 102536111
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 16:31:38

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 98874061
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 23:14:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHE. 2021-12-23T22:59:36.76 0.1 undecidable manual S 179 73.8705 92 0.84 60
IV.HVIT.HHE. 2021-12-23T22:59:32.03 0.1 undecidable manual S 213 59.9955 92 -0.2 49
IV.HMDC.HNN. 2021-12-23T22:59:31.14 0.1 undecidable manual S 190 54.9006 93 0.28 50
IV.SSY.HHZ. 2021-12-23T22:59:26.35 0.1 undecidable manual S 153 35.742 95 0.59 47
IV.ISPIC.EHE. 2021-12-23T22:59:26.34 0.1 undecidable manual P 179 73.8705 92 -0.2 73
IV.HVZN.HHZ. 2021-12-23T22:59:25.35 0.1 undecidable manual S 208 33.5442 95 0.18 53
IV.EMPL.HHZ. 2021-12-23T22:59:24.05 0.1 undecidable manual S 15 26.751 98 0.69 46
IV.HVIT.HHE. 2021-12-23T22:59:24.00 0.1 undecidable manual P 213 59.9955 92 -0.41 71
IV.ESPC.HHE. 2021-12-23T22:59:24.23 0.1 undecidable manual S 23 29.748 96 0.06 81
IV.HAGA.HHE. 2021-12-23T22:59:24.18 0.1 undecidable manual S 128 29.2485 97 0.15 79
IV.HMDC.HNN. 2021-12-23T22:59:23.12 0.1 undecidable manual P 190 54.9006 93 -0.5 70
IV.ESLN.HHE. 2021-12-23T22:59:23.32 0.1 undecidable manual S 15 28.3494 97 -0.47 75
IV.RAFF.HHZ. 2021-12-23T22:59:23.11 0.1 undecidable manual P 242 52.9026 93 -0.21 100
IV.EPZF.HHZ. 2021-12-23T22:59:22.54 0.1 undecidable manual P 356 42.0246 94 0.9 61
IV.ESML.HHZ. 2021-12-23T22:59:21.01 0.1 undecidable manual S 357 19.0698 105 -0.35 52
IT.LNT.HGZ. 2021-12-23T22:59:21.89 0.1 undecidable manual S 151 19.9689 104 0.29 52
IV.EPOZ.HHZ. 2021-12-23T22:59:21.05 0.1 undecidable manual P 46 36.1416 95 0.32 76
IV.ESCV.HHZ. 2021-12-23T22:59:20.75 0.1 undecidable manual P 349 34.0437 95 0.34 76
IV.ECZM.HHN. 2021-12-23T22:59:20.55 0.1 undecidable manual P 2 31.6461 96 0.5 73
IV.HVZN.HHZ. 2021-12-23T22:59:20.19 0.1 undecidable manual P 208 33.5442 95 -0.15 79
IV.SSY.HHZ. 2021-12-23T22:59:20.55 0.1 undecidable manual P 153 35.742 95 -0.13 79
IV.HLNI.HHE. 2021-12-23T22:59:19.69 0.1 undecidable manual S 189 10.9779 127 0.28 81
IV.HAGA.HHE. 2021-12-23T22:59:19.36 0.1 undecidable manual P 128 29.2485 97 -0.32 77
IV.ECHR.HHE. 2021-12-23T22:59:19.39 0.1 undecidable manual P 4 26.6511 98 0.1 54
IV.EMPL.HHZ. 2021-12-23T22:59:19.53 0.1 undecidable manual P 15 26.751 98 0.24 78
IV.ESPC.HHE. 2021-12-23T22:59:19.36 0.1 undecidable manual P 23 29.748 96 -0.4 76
IV.ESLN.HHE. 2021-12-23T22:59:18.86 0.1 undecidable manual P 15 28.3494 97 -0.68 70
IV.ESML.HHZ. 2021-12-23T22:59:17.79 0.1 undecidable manual P 357 19.0698 105 -0.35 52
IT.LNT.HGZ. 2021-12-23T22:59:17.88 0.1 undecidable manual P 151 19.9689 104 -0.39 77
IV.HLNI.HHE. 2021-12-23T22:59:16.91 0.1 undecidable manual P 189 10.9779 127 -0.1 82
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HVZN.HHN. ML:1.2 0.00007169863 0.3968 AML other m 2021-12-23T22:59:26.41
IV.SSY.HHN. ML:1.9 0.00031447096000000003 0.1152 AML other m 2021-12-23T22:59:28.30
IV.SSY.HHE. ML:1.6 0.00016188356 0.1792 AML other m 2021-12-23T22:59:29.36
IV.HVZN.HHE. ML:1.3 0.0000886 1.22 AML other m 2021-12-23T22:59:31.94
IV.EMPL.HHE. ML:1.9 0.0003789509 0.2048 AML other m 2021-12-23T22:59:25.00
IV.EMPL.HHN. ML:2.1 0.0006955 0.26 AML other m 2021-12-23T22:59:34.74
IV.ESCV.HHE. ML:1.6 0.0001505 0.7 AML other m 2021-12-23T22:59:38.34
IV.ESCV.HHN. ML:1.4 0.00011048277500000001 0.3712 AML other m 2021-12-23T22:59:38.50
IV.SSY.HNE. ML:1.3 0.000082208115 0.2176 AML other m 2021-12-23T22:59:29.71
IV.SSY.HNN. ML:1.5 0.000108318425 0.128 AML other m 2021-12-23T22:59:28.31
IV.EPOZ.HHE. ML:1.3 0.00006791826 0.0896 AML other m 2021-12-23T22:59:32.56
IV.RAFF.HHE. ML:1.2 0.000037937535 0.4224 AML other m 2021-12-23T22:59:32.52
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