Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 24-12-2021 and time 14:57:31 (Italy) in region 5 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.4 earthquake occured in region: 5 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 13:57:31 (UTC)
  • 24-12-2021 14:57:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4870, 14.9260 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 8 49410 61526
Paternò CT 10 48228 109754
Camporotondo Etneo CT 12 5023 114777
Belpasso CT 13 28108 142885
San Pietro Clarenza CT 13 7743 150628
Catania CT 14 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 16 3924 544023
Tremestieri Etneo CT 16 20589 564612
Nicolosi CT 17 7463 572075
San Giovanni la Punta CT 18 23060 595135
Biancavilla CT 18 24007 619142
San Gregorio di Catania CT 18 11966 631108
Pedara CT 19 14102 645210
Trecastagni CT 20 10910 656120

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Catania (314555 inhabitants)
26 Km SW of Acireale (52622 inhabitants)
57 Km NW of Siracusa (122291 inhabitants)
65 Km N of Ragusa (73313 inhabitants)
69 Km NE of Vittoria (63339 inhabitants)
71 Km N of Modica (54633 inhabitants)
76 Km NE of Gela (75827 inhabitants)
76 Km E of Caltanissetta (63360 inhabitants)
94 Km SW of Reggio di Calabria (183035 inhabitants)
96 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 1.4 2021-12-24
13:57:31		 37.4867 14.9262 10 2022-03-30
13:04:24		 Bollettino Sismico Italiano INGV 99145081
Reviewed
Rev100 		ML 1.6 2021-12-24
13:57:31		 37.4908 14.9232 10 2021-12-24
14:09:26		 Sala Sismica INGV-Roma 98914161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 13:57:31 ± 0.08
Latitude 37.4867 ± 0.0036
Longitude 14.9262 ± 0.0091
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 99145081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 790
Semi-minor axis of confidence ellipse (meter) 248
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) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.13670
Epicentral distance of station farthest from the epicenter (degree) 0.58906
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 98914161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 14:09:26

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 99145081
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-16 13:38:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2021-12-24T13:57:50.77 0.3 undecidable manual S 240 57.6978 50 1.32 44
IV.HMDC.HNN. 2021-12-24T13:57:50.24 0.6 undecidable manual S 192 59.8956 50 0.21 45
IV.AIO.HHZ. 2021-12-24T13:57:50.51 0.6 undecidable manual S 27 60.0954 50 0.42 43
IV.HVIT.HHZ. 2021-12-24T13:57:50.88 0.6 undecidable manual S 213 65.3901 50 -0.63 40
IV.HSRS.HNN. 2021-12-24T13:57:47.82 0.6 undecidable manual S 149 50.9157 50 0.19 46
IV.SSY.HHZ. 2021-12-24T13:57:45.08 0.6 undecidable manual S 160 38.7279 50 0.69 41
IV.HVZN.HHZ. 2021-12-24T13:57:44.77 0.6 undecidable manual S 209 38.9277 50 0.33 46
IV.HVIT.HHZ. 2021-12-24T13:57:42.30 0.3 undecidable manual P 213 65.3901 50 -0.67 59
IV.HAGA.HHZ. 2021-12-24T13:57:42.43 0.6 undecidable manual S 138 30.1476 50 0.34 46
IV.RAFF.HHZ. 2021-12-24T13:57:41.32 0.1 undecidable manual P 240 57.6978 50 -0.46 86
IV.HMDC.HNN. 2021-12-24T13:57:41.98 0.3 undecidable manual P 192 59.8956 50 -0.14 69
IV.AIO.HHZ. 2021-12-24T13:57:41.83 0.3 undecidable manual P 27 60.0954 50 -0.32 66
IV.ESPC.HHZ. 2021-12-24T13:57:40.56 0.6 undecidable manual S 21 24.5532 112 0.1 49
IV.HSRS.HNN. 2021-12-24T13:57:40.36 0.3 undecidable manual P 149 50.9157 50 -0.37 66
IT.LNT.HGZ. 2021-12-24T13:57:40.29 0.3 undecidable manual S 163 22.9548 113 0.31 71
IV.GALF.HHZ. 2021-12-24T13:57:39.13 0.3 undecidable manual P 308 40.2264 50 0.04 72
IV.EMPL.HHZ. 2021-12-24T13:57:39.61 0.6 undecidable manual S 10 21.6672 114 0.05 50
IV.SSY.HHZ. 2021-12-24T13:57:38.72 0.1 negative manual P 160 38.7279 50 -0.14 95
IV.EPOZ.HHZ. 2021-12-24T13:57:38.00 0.3 undecidable manual P 48 30.8469 50 0.35 69
IV.ESML.HHZ. 2021-12-24T13:57:38.28 0.6 undecidable manual S 344 15.1737 123 0.72 42
IV.HVZN.HHZ. 2021-12-24T13:57:38.64 0.3 undecidable manual P 209 38.9277 50 -0.25 70
IV.HLNI.HHZ. 2021-12-24T13:57:38.25 0.6 undecidable manual S 197 16.0728 121 0.42 47
IV.HAGA.HHZ. 2021-12-24T13:57:37.28 0.1 negative manual P 138 30.1476 50 -0.25 94
IV.ECZM.HHZ. 2021-12-24T13:57:37.20 0.3 undecidable manual P 356 27.2505 50 0.12 73
IV.EMPL.HHZ. 2021-12-24T13:57:36.25 0.1 undecidable manual P 10 21.6672 114 0.18 97
IV.ESLN.HHZ. 2021-12-24T13:57:36.42 0.3 undecidable manual P 10 23.3544 113 0.05 75
IV.ESPC.HHZ. 2021-12-24T13:57:36.18 0.1 positive manual P 21 24.5532 112 -0.41 92
IV.ECHR.HHE. 2021-12-24T13:57:36.13 0.3 undecidable manual P 357 22.1556 114 -0.03 75
IT.LNT.HGZ. 2021-12-24T13:57:36.21 0.3 undecidable manual P 163 22.9548 113 -0.1 74
IV.HLNI.HHZ. 2021-12-24T13:57:34.99 0.1 negative manual P 197 16.0728 121 -0.08 100
IV.ESML.HHZ. 2021-12-24T13:57:34.70 0.3 undecidable manual P 344 15.1737 123 -0.22 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.5 0.00027225065 0.0832 AML other m 2021-12-24T13:57:38.36
IV.HLNI.HHN. ML:1.6 0.00035914785000000005 0.1024 AML other m 2021-12-24T13:57:38.36
IV.EMPL.HHE. ML:1.5 0.00023515239999999997 0.6208 AML other m 2021-12-24T13:57:40.19
IV.HAGA.HHN. ML:1.1 0.0000534936985 0.1984 AML other m 2021-12-24T13:57:42.60
IV.HAGA.HHE. ML:1.5 0.00014710329999999998 0.3392 AML other m 2021-12-24T13:57:42.73
IV.HVZN.HHN. ML:1.3 0.00007154198 0.32 AML other m 2021-12-24T13:57:45.02
IV.HVZN.HHE. ML:1.5 0.00010932796 0.2816 AML other m 2021-12-24T13:57:44.96
IV.SSY.HNN. ML:1.5 0.0001068553475 0.2688 AML other m 2021-12-24T13:57:45.23
IV.SSY.HHN. ML:2.0 0.00037051655 0.2368 AML other m 2021-12-24T13:57:45.24
IV.SSY.HNE. ML:1.5 0.000106682415 0.2176 AML other m 2021-12-24T13:57:45.26
IV.SSY.HHE. ML:1.7 0.00017170075 0.2176 AML other m 2021-12-24T13:57:45.29
IV.AIO.HHE. ML:1.1 0.000025302233899999998 0.2176 AML other m 2021-12-24T13:57:50.87
IV.AIO.HHN. ML:1.2 0.000032335455 0.32 AML other m 2021-12-24T13:57:50.90
IV.HVIT.HHE. ML:1.3 0.000034479865 0.1408 AML other m 2021-12-24T13:57:51.58
IV.HVIT.HHN. ML:1.4 0.000045419025 0.1024 AML other m 2021-12-24T13:57:51.69
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