Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 24-12-2021 and time 01:08:22 (UTC) in region 7 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.6 earthquake occured in region: 7 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 01:08:22 (UTC)
  • 24-12-2021 02:08:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4770, 14.9100 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 7 12116 12116
Misterbianco CT 10 49410 61526
Paternò CT 11 48228 109754
Camporotondo Etneo CT 13 5023 114777
Belpasso CT 14 28108 142885
San Pietro Clarenza CT 15 7743 150628
Santa Maria di Licodia CT 16 7641 158269
Catania CT 16 314555 472824
Gravina di Catania CT 16 25838 498662
Mascalucia CT 17 31958 530620
Ragalna CT 17 3924 534544
Sant'Agata li Battiati CT 18 9479 544023
Tremestieri Etneo CT 18 20589 564612
Nicolosi CT 19 7463 572075
Biancavilla CT 19 24007 596082
San Giovanni la Punta CT 20 23060 619142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km W of Catania (314555 inhabitants)
27 Km SW of Acireale (52622 inhabitants)
57 Km NW of Siracusa (122291 inhabitants)
63 Km N of Ragusa (73313 inhabitants)
67 Km NE of Vittoria (63339 inhabitants)
70 Km N of Modica (54633 inhabitants)
74 Km NE of Gela (75827 inhabitants)
75 Km E of Caltanissetta (63360 inhabitants)
96 Km SW of Reggio di Calabria (183035 inhabitants)
98 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 1.6 2021-12-24
01:08:22		 37.4768 14.9103 10 2022-03-30
13:04:24		 Bollettino Sismico Italiano INGV 99052761
Reviewed
Rev100 		ML 1.6 2021-12-24
01:08:22		 37.47 14.8682 17 2021-12-24
01:13:28		 Sala Sismica INGV-Roma 98878271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 01:08:22 ± 0.07
Latitude 37.4768 ± 0.0027
Longitude 14.9103 ± 0.0079
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 99052761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 666
Semi-minor axis of confidence ellipse (meter) 90
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 278
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.13220
Epicentral distance of station farthest from the epicenter (degree) 0.91731
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 98878271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 01:13:28

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 29
Type of magnitude ML
Reference to an origin 99052761
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-15 15:36:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSRU.HHZ. 2021-12-24T01:08:53.03 0.6 undecidable manual S 31 101.8203 50 0.66 37
IV.MPNC.HHZ. 2021-12-24T01:08:47.71 0.6 undecidable manual S 27 83.7495 50 0.15 43
IV.ISPIC.EHZ. 2021-12-24T01:08:46.58 0.6 undecidable manual S 180 77.2671 50 0.76 37
IV.HVIT.HHZ. 2021-12-24T01:08:42.13 0.6 undecidable manual S 213 63.7917 50 -0.08 46
IV.AIO.HHZ. 2021-12-24T01:08:41.71 0.6 undecidable manual S 27 61.6938 50 0.04 46
IV.RAFF.HHZ. 2021-12-24T01:08:41.66 0.6 undecidable manual S 240 55.9995 50 1.53 26
IV.HMDC.HHZ. 2021-12-24T01:08:41.18 0.6 undecidable manual S 191 58.497 50 0.36 44
IV.HSRS.HHZ. 2021-12-24T01:08:39.13 0.6 undecidable manual S 147 50.7159 50 0.4 44
IV.MSRU.HHZ. 2021-12-24T01:08:39.48 0.3 undecidable manual P 31 101.8203 50 -0.27 61
IV.ECTS.HHZ. 2021-12-24T01:08:38.27 0.3 undecidable manual S 22 48.618 50 0.1 70
IV.MPNC.HHZ. 2021-12-24T01:08:36.46 0.3 undecidable manual P 27 83.7495 50 -0.52 60
IV.GALF.HHZ. 2021-12-24T01:08:36.46 0.6 undecidable manual S 311 39.8268 50 0.63 42
IV.SSY.HHZ. 2021-12-24T01:08:36.19 0.6 undecidable manual S 158 38.2284 50 0.79 39
IV.HVZN.HHZ. 2021-12-24T01:08:35.39 0.6 undecidable manual S 207 37.3293 50 0.23 47
IV.ISPIC.EHZ. 2021-12-24T01:08:35.78 0.1 undecidable manual P 180 77.2671 50 -0.19 87
IV.EPOZ.HHZ. 2021-12-24T01:08:34.93 0.6 undecidable manual S 48 32.6451 50 1.02 36
IV.AIO.HHZ. 2021-12-24T01:08:33.11 0.1 undecidable manual P 27 61.6938 50 -0.46 85
IV.HAGA.HHZ. 2021-12-24T01:08:33.56 0.6 undecidable manual S 135 30.2475 50 0.28 47
IV.HVIT.HHZ. 2021-12-24T01:08:33.33 0.1 undecidable manual P 213 63.7917 50 -0.56 82
IV.ESLN.HHZ. 2021-12-24T01:08:32.06 0.6 undecidable manual S 13 24.6531 112 0.29 47
IV.HMDC.HHZ. 2021-12-24T01:08:32.69 0.3 undecidable manual P 191 58.497 50 -0.4 65
IV.RAFF.HHZ. 2021-12-24T01:08:32.37 0.1 positive manual P 240 55.9995 50 -0.32 88
IV.EMPL.HHZ. 2021-12-24T01:08:31.99 0.6 undecidable manual S 13 23.0547 114 0.75 41
IV.HSRS.HHZ. 2021-12-24T01:08:31.43 0.1 undecidable manual P 147 50.7159 50 -0.45 87
IV.ECHR.HNZ. 2021-12-24T01:08:31.70 0.6 undecidable manual S 1 23.2545 113 0.39 46
MN.VAE.HHZ. 2021-12-24T01:08:31.92 0.3 undecidable manual P 269 49.0176 50 0.3 67
IV.ESPC.HHZ. 2021-12-24T01:08:31.73 0.6 undecidable manual S 23 26.0517 50 -0.42 46
IT.LNT.HGZ. 2021-12-24T01:08:31.19 0.3 undecidable manual S 159 22.4553 114 0.14 73
IV.ECTS.HHZ. 2021-12-24T01:08:30.94 0.3 undecidable manual P 22 48.618 50 -0.61 62
IV.EPIT.HHN. 2021-12-24T01:08:30.20 0.6 undecidable manual P 19 39.2274 50 0.09 48
IV.EMNR.HHZ. 2021-12-24T01:08:30.57 1.0 undecidable manual P 15 39.0276 50 0.49 22
IV.GALF.HHZ. 2021-12-24T01:08:30.00 0.1 undecidable manual P 311 39.8268 50 -0.2 93
IV.EPZF.HHZ. 2021-12-24T01:08:30.23 0.3 undecidable manual P 353 38.8278 50 0.19 70
IV.HVZN.HHZ. 2021-12-24T01:08:29.63 0.1 undecidable manual P 207 37.3293 50 -0.18 94
IV.ESVO.HHE. 2021-12-24T01:08:29.59 0.6 undecidable manual P 6 33.0447 50 0.44 45
IV.HLNI.HHZ. 2021-12-24T01:08:29.34 0.6 undecidable manual S 193 14.6742 125 0.65 43
IV.EPOZ.HHZ. 2021-12-24T01:08:29.29 0.1 undecidable manual P 48 32.6451 50 0.19 95
IV.ESML.HHZ. 2021-12-24T01:08:29.32 0.6 undecidable manual S 350 15.873 122 0.27 48
IV.SSY.HHZ. 2021-12-24T01:08:29.84 0.1 negative manual P 158 38.2284 50 -0.11 95
IV.ECZM.HHZ. 2021-12-24T01:08:28.96 0.6 undecidable manual P 359 28.2495 50 0.55 44
IV.EVRN.HNN. 2021-12-24T01:08:28.80 0.3 undecidable manual P 40 30.747 50 -0.01 74
IV.HAGA.HHZ. 2021-12-24T01:08:28.44 0.1 negative manual P 135 30.2475 50 -0.29 93
IV.ESCV.HHZ. 2021-12-24T01:08:28.56 0.3 undecidable manual P 344 31.1466 50 -0.3 70
IV.EMFS.HHE. 2021-12-24T01:08:28.33 0.6 undecidable manual P 16 28.0497 50 -0.05 49
IV.EMPL.HHZ. 2021-12-24T01:08:27.80 0.1 undecidable manual P 13 23.0547 114 0.24 95
IT.LNT.HGZ. 2021-12-24T01:08:27.29 0.3 undecidable manual P 159 22.4553 114 -0.15 73
IV.ECHR.HNZ. 2021-12-24T01:08:27.31 0.1 undecidable manual P 1 23.2545 113 -0.28 95
IV.ESLN.HHZ. 2021-12-24T01:08:27.88 0.3 undecidable manual P 13 24.6531 112 0.02 75
IV.ESPC.HHZ. 2021-12-24T01:08:27.54 0.3 undecidable manual P 23 26.0517 50 -0.54 66
IV.HLNI.HHZ. 2021-12-24T01:08:26.16 0.1 positive manual P 193 14.6742 125 0.08 100
IV.ESML.HHZ. 2021-12-24T01:08:25.84 0.1 undecidable manual P 350 15.873 122 -0.45 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HNN. ML:1.3 0.000176259 0.5896 AML other m 2021-12-24T01:08:29.68
IV.ESML.HHN. ML:1.3 0.0001916738 0.56 AML other m 2021-12-24T01:08:29.67
IV.HLNI.HHE. ML:1.9 0.0007025644 0.12 AML other m 2021-12-24T01:08:29.50
IV.ESML.HNE. ML:1.5 0.0003105 0.62 AML other m 2021-12-24T01:08:29.47
IV.ESML.HHE. ML:1.4 0.00023150825 0.58 AML other m 2021-12-24T01:08:29.77
IV.HLNI.HHN. ML:1.8 0.000578 0.1 AML other m 2021-12-24T01:08:29.57
IV.EMPL.HHE. ML:2.0 0.0007410375 0.2 AML other m 2021-12-24T01:08:32.31
IV.EMPL.HHN. ML:1.9 0.00046839885000000004 0.26 AML other m 2021-12-24T01:08:32.63
IV.HAGA.HHE. ML:1.1 0.000066952415 0.18 AML other m 2021-12-24T01:08:33.79
IV.HAGA.HHN. ML:1.3 0.00010331599999999998 0.38 AML other m 2021-12-24T01:08:33.74
IV.HVZN.HHN. ML:1.6 0.00015471302500000002 1.16 AML other m 2021-12-24T01:08:36.53
IV.HVZN.HHE. ML:1.5 0.000108419825 1.06 AML other m 2021-12-24T01:08:36.22
IV.SSY.HHE. ML:2.0 0.00034248500000000007 0.32 AML other m 2021-12-24T01:08:36.44
IV.SSY.HNE. ML:1.4 0.00009529694999999999 0.7 AML other m 2021-12-24T01:08:36.43
IV.GALF.HHE. ML:1.4 0.00007907536000000001 0.34 AML other m 2021-12-24T01:08:37.41
IV.HSRS.HHN. ML:1.4 0.000060112639999999994 0.1 AML other m 2021-12-24T01:08:39.36
IV.GALF.HHN. ML:1.6 0.00013350000000000002 0.34 AML other m 2021-12-24T01:08:40.61
IV.HMDC.HNE. ML:1.8 0.00014278854999999997 1.24 AML other m 2021-12-24T01:08:41.88
IV.RAFF.HHN. ML:1.4 0.000049583895000000004 0.36 AML other m 2021-12-24T01:08:41.87
IV.HMDC.HHE. ML:1.7 0.00009827146500000001 0.24 AML other m 2021-12-24T01:08:41.88
IV.AIO.HHE. ML:1.2 0.000030962595 0.46 AML other m 2021-12-24T01:08:42.03
IV.RAFF.HHE. ML:1.5 0.000073538565 0.22 AML other m 2021-12-24T01:08:42.16
IV.AIO.HHN. ML:1.0 0.000019688245 0.28 AML other m 2021-12-24T01:08:42.47
IV.HVIT.HHN. ML:1.6 0.000071038375 0.36 AML other m 2021-12-24T01:08:42.62
IV.ISPIC.HNN. ML:2.0 0.00013895985 0.18 AML other m 2021-12-24T01:08:46.91
IV.ISPIC.EHN. ML:2.0 0.00015071295 0.16 AML other m 2021-12-24T01:08:46.92
IV.ISPIC.EHE. ML:2.0 0.0001395 0.92 AML other m 2021-12-24T01:08:47.52
IV.MPNC.HHN. ML:1.5 0.00003966837 1.72 AML other m 2021-12-24T01:08:48.77
IV.MPNC.HHE. ML:1.2 0.000021100245 0.34 AML other m 2021-12-24T01:08:48.62
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