Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 23-12-2021 and time 23:45:23 (Italy) in region 8 km SW Motta Sant'Anastasia (CT)

A magnitude ML 2.3 earthquake occured in region: 8 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 22:45:23 (UTC)
  • 23-12-2021 23:45:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4680, 14.9040 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 8 12116 12116
Misterbianco CT 11 49410 61526
Paternò CT 12 48228 109754
Camporotondo Etneo CT 14 5023 114777
Belpasso CT 15 28108 142885
San Pietro Clarenza CT 16 7743 150628
Santa Maria di Licodia CT 17 7641 158269
Catania CT 17 314555 472824
Gravina di Catania CT 17 25838 498662
Mascalucia CT 18 31958 530620
Ragalna CT 18 3924 534544
Sant'Agata li Battiati CT 19 9479 544023
Tremestieri Etneo CT 19 20589 564612
Scordia CT 20 17095 581707
Nicolosi CT 20 7463 589170
Biancavilla CT 20 24007 613177

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km W of Catania (314555 inhabitants)
28 Km SW of Acireale (52622 inhabitants)
57 Km NW of Siracusa (122291 inhabitants)
62 Km N of Ragusa (73313 inhabitants)
66 Km NE of Vittoria (63339 inhabitants)
69 Km N of Modica (54633 inhabitants)
73 Km NE of Gela (75827 inhabitants)
74 Km E of Caltanissetta (63360 inhabitants)
97 Km SW of Reggio di Calabria (183035 inhabitants)
99 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 2.3 2021-12-23
22:45:23		 37.4682 14.904 11 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102534631
Reviewed
Rev100 		ML 2.3 2021-12-23
22:45:23		 37.4657 14.9147 9 2021-12-23
22:55:42		 Sala Sismica INGV-Roma 98872821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 22:45:23 ± 0.08
Latitude 37.4682 ± 0.0027
Longitude 14.9040 ± 0.0079
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102534631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 654
Semi-minor axis of confidence ellipse (meter) 263
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 267
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
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 60
Number of defining phases 60
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) 0.12231
Epicentral distance of station farthest from the epicenter (degree) 1.55673
Number of stations at which the event was observed 43
Number of stations from which data was used for origin computation 43
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 64
Type of magnitude ML
Reference to an origin 98872821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 22:55:42

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 64
Type of magnitude ML
Reference to an origin 102534631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 15:47:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLAC.HHZ. 2021-12-23T22:45:50.66 0.3 undecidable manual P 50 172.7937 50 -0.65 45
IV.JOPP.HHZ. 2021-12-23T22:45:47.26 0.3 undecidable manual P 34 152.6361 50 -0.95 44
IV.IACL.HHZ. 2021-12-23T22:45:43.50 0.3 undecidable manual P 338 127.4724 50 -0.82 49
IV.MUCR.HHE. 2021-12-23T22:45:42.54 0.6 undecidable manual S 358 63.7917 50 -0.26 44
IV.MSRU.HHZ. 2021-12-23T22:45:40.32 0.3 undecidable manual P 31 102.9192 50 -0.22 62
IV.MTTG.HHZ. 2021-12-23T22:45:39.08 0.3 undecidable manual P 49 91.6416 50 0.28 63
IV.HSRS.HHZ. 2021-12-23T22:45:39.56 0.6 undecidable manual S 146 50.2164 50 0.39 44
IV.MPNC.HHZ. 2021-12-23T22:45:37.45 0.3 undecidable manual P 27 84.9483 50 -0.31 63
IV.EPZF.HHZ. 2021-12-23T22:45:36.60 0.6 undecidable manual S 354 39.7269 50 0.24 47
IV.ECBD.HHN. 2021-12-23T22:45:36.05 0.6 undecidable manual S 25 38.1285 50 0.1 48
IV.MCPD.HHZ. 2021-12-23T22:45:36.28 0.3 undecidable manual P 348 73.8705 50 0.22 66
IV.SSY.HHZ. 2021-12-23T22:45:36.49 0.3 undecidable manual S 156 37.5291 50 0.7 61
IV.CROCE.HHZ. 2021-12-23T22:45:36.19 0.3 undecidable manual P 205 77.6667 50 -0.47 62
IV.ISPIC.EHZ. 2021-12-23T22:45:36.40 0.3 undecidable manual P 180 76.2681 50 -0.04 68
IV.HVZN.HHZ. 2021-12-23T22:45:35.57 0.6 undecidable manual S 207 36.2415 50 0.14 48
IV.EPOZ.HHZ. 2021-12-23T22:45:35.78 0.3 undecidable manual S 48 33.744 50 1.01 54
IV.MSFR.HHZ. 2021-12-23T22:45:35.53 0.6 undecidable manual P 337 68.4759 50 0.3 44
IV.MUCR.HHE. 2021-12-23T22:45:34.74 0.3 undecidable manual P 358 63.7917 50 0.23 67
IV.AIO.HHZ. 2021-12-23T22:45:34.24 0.1 undecidable manual P 27 62.7927 50 -0.12 92
IV.ECZM.HHN. 2021-12-23T22:45:34.34 0.6 undecidable manual S 0 29.1486 50 0.78 40
IV.HAGA.HHZ. 2021-12-23T22:45:34.16 0.6 undecidable manual S 132 30.0477 50 0.37 46
IV.HMDC.HHZ. 2021-12-23T22:45:33.55 0.3 undecidable manual P 191 57.498 50 0.01 71
IV.RAFF.HHZ. 2021-12-23T22:45:33.04 0.1 undecidable manual P 240 55.0005 50 -0.11 93
IV.ESCV.HHZ. 2021-12-23T22:45:33.74 0.6 undecidable manual S 346 31.9458 50 -0.54 44
IV.HVIT.HHZ. 2021-12-23T22:45:33.79 0.3 undecidable manual P 213 62.6928 50 -0.54 62
IV.ESPC.HHN. 2021-12-23T22:45:32.88 0.6 undecidable manual S 24 27.1506 50 -0.13 49
IV.EMPL.HHZ. 2021-12-23T22:45:32.09 0.6 undecidable manual S 14 24.0537 50 -0.11 49
IV.HSRS.HHZ. 2021-12-23T22:45:32.03 0.1 undecidable manual P 146 50.2164 50 -0.38 89
IV.ESLN.HHZ. 2021-12-23T22:45:32.64 0.6 undecidable manual S 14 25.752 50 0 50
IV.ECHR.HHE. 2021-12-23T22:45:32.85 0.6 undecidable manual S 2 24.1536 50 0.62 43
MN.VAE.HHZ. 2021-12-23T22:45:32.72 0.3 undecidable manual P 270 48.5181 50 0.57 63
IV.EFIU.HHZ. 2021-12-23T22:45:31.59 0.3 undecidable manual P 37 44.622 50 0.04 72
IV.ECTS.HHZ. 2021-12-23T22:45:31.91 0.3 undecidable manual P 22 49.7169 50 -0.43 66
IV.EPZF.HHZ. 2021-12-23T22:45:31.42 0.3 undecidable manual P 354 39.7269 50 0.63 63
IT.LNT.HGZ. 2021-12-23T22:45:31.71 0.6 undecidable manual S 157 21.7671 116 0.16 49
IV.GALF.HHZ. 2021-12-23T22:45:31.14 0.3 undecidable manual P 312 40.0266 50 0.29 69
IV.ESML.HHZ. 2021-12-23T22:45:30.25 0.6 undecidable manual S 353 16.7721 122 0.21 49
IV.ESVO.HHE. 2021-12-23T22:45:30.55 0.1 undecidable manual P 6 34.0437 50 0.63 85
IV.EPIT.HHZ. 2021-12-23T22:45:30.80 0.3 undecidable manual P 19 40.3263 50 -0.1 72
IV.ESAL.HHE. 2021-12-23T22:45:30.53 0.3 undecidable manual P 32 37.7289 50 0.04 73
IV.EPOZ.HHZ. 2021-12-23T22:45:30.34 0.1 positive manual P 48 33.744 50 0.47 90
IV.EMNR.HHZ. 2021-12-23T22:45:30.93 0.3 undecidable manual P 15 40.1265 50 0.07 72
IV.SSY.HHZ. 2021-12-23T22:45:30.37 0.1 undecidable manual P 156 37.5291 50 -0.1 97
IV.EMFO.HHE. 2021-12-23T22:45:29.15 0.6 undecidable manual P 29 33.8439 50 -0.75 40
IV.ESCV.HHZ. 2021-12-23T22:45:29.66 0.3 undecidable manual P 346 31.9458 50 0.06 74
IV.HVZN.HHZ. 2021-12-23T22:45:29.91 0.3 undecidable manual P 207 36.2415 50 -0.35 69
IV.ECBD.HHN. 2021-12-23T22:45:29.97 0.1 undecidable manual P 25 38.1285 50 -0.58 86
IV.EMCN.HHN. 2021-12-23T22:45:29.93 0.3 undecidable manual P 18 37.629 50 -0.54 65
IV.EVRN.HHZ. 2021-12-23T22:45:29.55 0.3 undecidable manual P 40 31.8459 50 -0.04 74
IV.HLNI.HHZ. 2021-12-23T22:45:29.57 0.3 undecidable manual S 192 13.5753 128 0.44 70
IV.ECZM.HHN. 2021-12-23T22:45:29.55 0.3 undecidable manual P 0 29.1486 50 0.37 69
IV.HAGA.HHZ. 2021-12-23T22:45:29.09 0.1 undecidable manual P 132 30.0477 50 -0.21 96
IV.ESPC.HHN. 2021-12-23T22:45:28.57 0.1 undecidable manual P 24 27.1506 50 -0.29 94
IV.EMPL.HHZ. 2021-12-23T22:45:28.51 0.1 undecidable manual P 14 24.0537 50 0.12 98
IV.ESLN.HHZ. 2021-12-23T22:45:28.62 0.1 undecidable manual P 14 25.752 50 -0.02 100
IV.ECHR.HHE. 2021-12-23T22:45:28.42 0.3 undecidable manual P 2 24.1536 50 0.02 75
IV.EMFS.HHE. 2021-12-23T22:45:28.90 0.3 undecidable manual P 16 29.0487 50 -0.26 71
IV.ESML.HHZ. 2021-12-23T22:45:27.11 0.3 undecidable manual P 353 16.7721 122 -0.03 76
IT.LNT.HGZ. 2021-12-23T22:45:27.87 0.1 undecidable manual P 157 21.7671 116 -0.15 98
IV.HLNI.HHZ. 2021-12-23T22:45:26.75 0.1 undecidable manual P 192 13.5753 128 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:2.6 0.00438 0.18 AML other m 2021-12-23T22:45:29.81
IV.HLNI.HHN. ML:2.6 0.0037649999999999997 0.14 AML other m 2021-12-23T22:45:31.76
IV.ESML.HNE. ML:2.1 0.0011400000000000002 1.38 AML other m 2021-12-23T22:45:32.74
IV.ESML.HHE. ML:2.1 0.001195 1.38 AML other m 2021-12-23T22:45:32.75
IV.ESML.HHN. ML:2.1 0.0011149999999999999 0.24 AML other m 2021-12-23T22:45:35.80
IV.ESML.HNN. ML:2.0 0.0009585 0.22 AML other m 2021-12-23T22:45:35.69
IV.EMPL.HHE. ML:2.9 0.005189999999999999 1.68 AML other m 2021-12-23T22:45:36.84
IV.HAGA.HHN. ML:2.1 0.0005625 0.5 AML other m 2021-12-23T22:45:36.43
IV.SSY.HHE. ML:2.7 0.00199 0.18 AML other m 2021-12-23T22:45:36.86
IV.EVRN.HHN. ML:2.5 0.001408 1.1 AML other m 2021-12-23T22:45:37.23
IV.EVRN.HNN. ML:2.5 0.0014315 1.08 AML other m 2021-12-23T22:45:37.23
IV.EMPL.HHN. ML:3.0 0.005985000000000001 0.24 AML other m 2021-12-23T22:45:37.27
IV.HAGA.HHE. ML:2.0 0.000451 0.48 AML other m 2021-12-23T22:45:38.56
IV.EPOZ.HNE. ML:2.4 0.000955 0.2 AML other m 2021-12-23T22:45:38.91
IV.EPOZ.HHE. ML:2.3 0.0008445 0.18 AML other m 2021-12-23T22:45:38.90
IV.EPOZ.HHN. ML:2.3 0.0008874999999999999 0.2 AML other m 2021-12-23T22:45:38.79
IV.ESCV.HHE. ML:2.5 0.00156 1.72 AML other m 2021-12-23T22:45:39.97
IV.EPOZ.HNN. ML:2.2 0.000782 1.34 AML other m 2021-12-23T22:45:40.27
IV.SSY.HNN. ML:2.4 0.0009975000000000001 1.02 AML other m 2021-12-23T22:45:40.86
IV.EVRN.HNE. ML:2.5 0.00139 0.18 AML other m 2021-12-23T22:45:40.45
IV.EVRN.HHE. ML:2.6 0.001615 0.18 AML other m 2021-12-23T22:45:40.45
IV.EFIU.HHN. ML:1.8 0.00020800000000000001 0.92 AML other m 2021-12-23T22:45:41.18
IV.HSRS.HHN. ML:1.8 0.00016900000000000002 0.52 AML other m 2021-12-23T22:45:41.93
IV.SSY.HNE. ML:2.4 0.0009119999999999999 0.22 AML other m 2021-12-23T22:45:41.99
IV.ESCV.HHN. ML:2.5 0.0015049999999999998 0.78 AML other m 2021-12-23T22:45:42.41
IV.HVZN.HHE. ML:2.4 0.0010225 1.48 AML other m 2021-12-23T22:45:42.77
IV.SSY.HHN. ML:3.0 0.003335 0.22 AML other m 2021-12-23T22:45:42.11
IV.EPZF.HHN. ML:2.4 0.0008900000000000001 0.84 AML other m 2021-12-23T22:45:42.55
IV.GALF.HHE. ML:2.3 0.0006765 1.12 AML other m 2021-12-23T22:45:42.97
IV.EFIU.HHE. ML:1.8 0.00019700000000000002 1.28 AML other m 2021-12-23T22:45:43.66
IV.EPZF.HHE. ML:2.6 0.0014 0.34 AML other m 2021-12-23T22:45:43.15
IV.HSRS.HHE. ML:1.9 0.000194 0.28 AML other m 2021-12-23T22:45:43.58
IV.EPIT.HHN. ML:2.3 0.000736 0.26 AML other m 2021-12-23T22:45:44.09
IV.RAFF.HHE. ML:2.1 0.0002875 0.36 AML other m 2021-12-23T22:45:44.73
IV.HMDC.HHN. ML:2.3 0.00044500000000000003 0.42 AML other m 2021-12-23T22:45:44.75
IV.HMDC.HNN. ML:2.3 0.00041500000000000006 0.4 AML other m 2021-12-23T22:45:44.75
IV.HMDC.HNE. ML:2.3 0.0004285 0.68 AML other m 2021-12-23T22:45:44.77
IV.HMDC.HHE. ML:2.3 0.000474 1.36 AML other m 2021-12-23T22:45:44.77
IV.RAFF.HHN. ML:1.9 0.00016599999999999997 1.76 AML other m 2021-12-23T22:45:44.90
IV.GALF.HHN. ML:2.4 0.0008314999999999999 0.78 AML other m 2021-12-23T22:45:45.50
IV.HVIT.HHE. ML:2.1 0.000247 0.76 AML other m 2021-12-23T22:45:45.19
IV.HVZN.HHN. ML:2.5 0.001315 1.52 AML other m 2021-12-23T22:45:45.76
IV.HVIT.HHN. ML:2.2 0.00029549999999999997 1.64 AML other m 2021-12-23T22:45:45.03
IV.AIO.HHE. ML:2.1 0.00026450000000000003 1.28 AML other m 2021-12-23T22:45:45.23
IV.ISPIC.HNN. ML:2.6 0.0005505 0.22 AML other m 2021-12-23T22:45:47.62
IV.ISPIC.EHN. ML:2.6 0.000594 0.24 AML other m 2021-12-23T22:45:47.63
IV.AIO.HHN. ML:1.9 0.000149 1.04 AML other m 2021-12-23T22:45:47.79
IV.EPIT.HHE. ML:2.1 0.0004265 0.26 AML other m 2021-12-23T22:45:48.27
IV.MCPD.HHE. ML:2.2 0.000248 0.46 AML other m 2021-12-23T22:45:49.08
IV.CROCE.HNN. ML:2.4 0.00033899999999999995 1.42 AML other m 2021-12-23T22:45:49.17
IV.CROCE.HHN. ML:2.2 0.000228 1.58 AML other m 2021-12-23T22:45:49.19
IV.ISPIC.HNE. ML:2.6 0.000683 0.92 AML other m 2021-12-23T22:45:49.84
IV.ISPIC.EHE. ML:2.6 0.0006535 0.92 AML other m 2021-12-23T22:45:49.84
IV.CROCE.HNE. ML:2.2 0.0002265 1.56 AML other m 2021-12-23T22:45:49.21
IV.MCPD.HHN. ML:2.2 0.000256 1.38 AML other m 2021-12-23T22:45:50.08
IV.CROCE.HHE. ML:2.1 0.00016800000000000002 0.76 AML other m 2021-12-23T22:45:51.37
IV.MPNC.HHN. ML:2.3 0.0002585 0.22 AML other m 2021-12-23T22:45:52.27
IV.MPNC.HHE. ML:2.2 0.000203 1.14 AML other m 2021-12-23T22:45:52.25
IV.MSRU.HHN. ML:2.4 0.000221 0.66 AML other m 2021-12-23T22:45:57.76
IV.MSRU.HHE. ML:2.4 0.0002385 0.36 AML other m 2021-12-23T22:45:59.01
IV.IACL.HHE. ML:2.5 0.00022649999999999998 1.74 AML other m 2021-12-23T22:46:04.95
IV.IACL.HHN. ML:2.5 0.0002115 0.38 AML other m 2021-12-23T22:46:05.29
IV.PLAC.HHE. ML:2.0 0.000038100000000000005 1.4 AML other m 2021-12-23T22:46:19.12
IV.PLAC.HHN. ML:2.0 0.000035699999999999994 0.78 AML other m 2021-12-23T22:46:20.28
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
Waveforms Seismic signals in miniseed + resp format Download