Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 23-12-2021 and time 23:52:51 (UTC) in region 5 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.3 earthquake occured in region: 5 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 23:52:51 (UTC)
  • 24-12-2021 00:52:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4830, 14.9230 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 5 12116 12116
Misterbianco CT 9 49410 61526
Paternò CT 11 48228 109754
Camporotondo Etneo CT 12 5023 114777
Belpasso CT 13 28108 142885
San Pietro Clarenza CT 14 7743 150628
Catania CT 15 314555 465183
Gravina di Catania CT 15 25838 491021
Santa Maria di Licodia CT 15 7641 498662
Mascalucia CT 15 31958 530620
Sant'Agata li Battiati CT 16 9479 540099
Ragalna CT 17 3924 544023
Tremestieri Etneo CT 17 20589 564612
Nicolosi CT 17 7463 572075
Biancavilla CT 18 24007 596082
San Giovanni la Punta CT 19 23060 619142
San Gregorio di Catania CT 19 11966 631108
Pedara CT 19 14102 645210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km W of Catania (314555 inhabitants)
26 Km SW of Acireale (52622 inhabitants)
57 Km NW of Siracusa (122291 inhabitants)
64 Km N of Ragusa (73313 inhabitants)
68 Km NE of Vittoria (63339 inhabitants)
71 Km N of Modica (54633 inhabitants)
75 Km NE of Gela (75827 inhabitants)
76 Km E of Caltanissetta (63360 inhabitants)
94 Km SW of Reggio di Calabria (183035 inhabitants)
97 Km SW of Messina (238439 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
23:52:51		 37.4827 14.923 10 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102536851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 23:52:51 ± 0.08
Latitude 37.4827 ± 0.0045
Longitude 14.9230 ± 0.0113
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 102536851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 976
Semi-minor axis of confidence ellipse (meter) 329
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 93
Circular confidence region, given by single value of horizontal uncertainty (meter) 980.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.70147
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 18
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 102536851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 16:50:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2021-12-23T23:54:24.22 3.0 undecidable manual Sn -6.05 0
IV.PAOL.HHZ. 2021-12-23T23:54:23.77 3.0 undecidable manual Sg 1.59 0
IV.MCRV.HHZ. 2021-12-23T23:54:18.11 3.0 undecidable manual Sg 0.54 0
IV.NRCA.HHZ. 2021-12-23T23:54:14.12 3.0 positive manual Pg 8.86 0
IV.MMUR.HNZ. 2021-12-23T23:54:12.13 3.0 undecidable manual Pn -1.55 0
IV.PP3.EHZ. 2021-12-23T23:54:03.76 3.0 positive manual Pn -8.2 0
IV.PAOL.HHZ. 2021-12-23T23:53:46.45 3.0 undecidable manual Pg 6.97 0
IV.CAFE.HHZ. 2021-12-23T23:53:34.70 3.0 undecidable manual Pn -5.62 0
IV.ISPIC.EHZ. 2021-12-23T23:53:16.30 0.6 undecidable manual S 181 77.8665 50 0.78 36
IV.HVIT.HHZ. 2021-12-23T23:53:11.71 0.6 undecidable manual S 213 64.8906 50 -0.33 43
IV.RAFF.HHZ. 2021-12-23T23:53:11.39 0.6 undecidable manual S 240 57.1983 50 1.39 28
IV.ISPIC.EHZ. 2021-12-23T23:53:05.28 0.3 undecidable manual P 181 77.8665 50 -0.26 64
IV.SSY.HHZ. 2021-12-23T23:53:05.61 0.6 undecidable manual S 160 38.4282 50 0.63 42
IV.HVZN.HHZ. 2021-12-23T23:53:04.79 0.6 undecidable manual S 209 38.4282 50 -0.18 47
IV.HMDC.HNN. 2021-12-23T23:53:03.59 0.3 undecidable manual P 192 59.3961 50 0.91 54
IV.HAGA.HHZ. 2021-12-23T23:53:02.92 0.6 undecidable manual S 137 29.9478 50 0.2 47
IV.HVIT.HHZ. 2021-12-23T23:53:02.91 0.3 undecidable manual P 213 64.8906 50 -0.63 60
IV.ESLN.HHZ. 2021-12-23T23:53:01.17 0.6 undecidable manual S 11 23.8539 112 0.36 46
IV.EMPL.HHZ. 2021-12-23T23:53:01.09 0.6 undecidable manual S 11 22.1556 113 0.81 40
IV.RAFF.HHZ. 2021-12-23T23:53:01.82 0.1 undecidable manual P 240 57.1983 50 -0.54 84
IV.ESPC.HHN. 2021-12-23T23:53:00.93 0.6 undecidable manual S 21 25.0527 111 -0.27 47
IT.LNT.HGZ. 2021-12-23T23:53:00.68 0.6 undecidable manual S 162 22.6551 113 0.25 48
IV.HVZN.HHZ. 2021-12-23T23:52:59.42 0.3 undecidable manual P 209 38.4282 50 -0.03 73
IV.EPZF.HHZ. 2021-12-23T23:52:59.71 0.3 undecidable manual P 351 38.3283 50 0.27 69
IV.SSY.HHZ. 2021-12-23T23:52:59.23 0.1 negative manual P 160 38.4282 50 -0.23 93
IV.EPOZ.HHZ. 2021-12-23T23:52:58.66 0.3 undecidable manual P 48 31.4463 50 0.28 70
IV.ESML.HHZ. 2021-12-23T23:52:58.48 0.6 undecidable manual S 346 15.4734 121 0.25 48
IV.ESCV.HHN. 2021-12-23T23:52:58.09 0.3 undecidable manual P 342 30.8469 50 -0.19 71
IV.HLNI.HHZ. 2021-12-23T23:52:58.63 0.6 undecidable manual S 197 15.5733 121 0.4 47
IV.HAGA.HHZ. 2021-12-23T23:52:57.77 0.1 undecidable manual P 137 29.9478 50 -0.38 91
IV.ECHR.HHE. 2021-12-23T23:52:57.08 0.3 undecidable manual P 358 22.6551 113 0.25 71
IV.ECZM.HHN. 2021-12-23T23:52:57.70 0.3 undecidable manual P 357 27.6501 109 -0.07 73
IT.LNT.HGZ. 2021-12-23T23:52:56.60 0.3 undecidable manual P 162 22.6551 113 -0.23 72
IV.ESPC.HHN. 2021-12-23T23:52:56.65 0.3 undecidable manual P 21 25.0527 111 -0.63 64
IV.ESLN.HHZ. 2021-12-23T23:52:56.97 0.3 undecidable manual P 11 23.8539 112 -0.08 74
IV.EMPL.HHZ. 2021-12-23T23:52:56.65 0.3 undecidable manual P 11 22.1556 113 -0.1 74
IV.ESML.HHZ. 2021-12-23T23:52:55.49 0.3 undecidable manual P 346 15.4734 121 -0.07 75
IV.HLNI.HHZ. 2021-12-23T23:52:55.49 0.1 negative manual P 197 15.5733 121 -0.07 100
IV.PLLN.EHZ. 2021-12-23T23:52:50.47 3.0 positive manual P -4.59 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHE. ML:1.1 0.00011949999999999999 0.66 AML other m 2021-12-23T23:52:58.48
IV.HLNI.HHN. ML:1.3 0.00019350000000000001 1.46 AML other m 2021-12-23T23:52:58.87
IV.HLNI.HHE. ML:1.4 0.0002235 0.18 AML other m 2021-12-23T23:52:58.85
IV.ESML.HHN. ML:1.1 0.000118 1.5 AML other m 2021-12-23T23:52:59.81
IV.SSY.HHE. ML:1.6 0.000148 1.24 AML other m 2021-12-23T23:53:05.79
IV.SSY.HHN. ML:1.7 0.00018607445 0.2048 AML other m 2021-12-23T23:53:07.79
IV.SSY.HNE. ML:1.1 0.0000480196 0.2304 AML other m 2021-12-23T23:53:08.24
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