Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 24-12-2021 and time 00:25:49 (UTC) in region 8 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.7 earthquake occured in region: 8 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 00:25:49 (UTC)
  • 24-12-2021 01:25:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4610, 14.9070 at 9 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 13 48228 109754
Camporotondo Etneo CT 15 5023 114777
Belpasso CT 16 28108 142885
San Pietro Clarenza CT 16 7743 150628
Catania CT 17 314555 465183
Santa Maria di Licodia CT 17 7641 472824
Gravina di Catania CT 18 25838 498662
Mascalucia CT 18 31958 530620
Sant'Agata li Battiati CT 19 9479 540099
Scordia CT 19 17095 557194
Ragalna CT 19 3924 561118
Tremestieri Etneo CT 20 20589 581707

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km W of Catania (314555 inhabitants)
29 Km SW of Acireale (52622 inhabitants)
56 Km NW of Siracusa (122291 inhabitants)
62 Km N of Ragusa (73313 inhabitants)
66 Km NE of Vittoria (63339 inhabitants)
68 Km N of Modica (54633 inhabitants)
73 Km NE of Gela (75827 inhabitants)
75 Km E of Caltanissetta (63360 inhabitants)
97 Km SW of Reggio di Calabria (183035 inhabitants)
100 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 1.7 2021-12-24
00:25:49		 37.4612 14.9068 9 2022-03-30
13:04:24		 Bollettino Sismico Italiano INGV 99052321
Reviewed
Rev100 		ML 1.9 2021-12-24
00:25:49		 37.4618 14.8437 10 2021-12-24
00:29:47		 Sala Sismica INGV-Roma 98876111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 00:25:49 ± 0.08
Latitude 37.4612 ± 0.0036
Longitude 14.9068 ± 0.0091
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99052321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 744
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 740.0
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 50
Number of defining phases 50
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.11601
Epicentral distance of station farthest from the epicenter (degree) 1.55942
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 98876111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 00:29:47

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 99052321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-15 14:49:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PLAC.HHZ. 2021-12-24T00:26:16.65 0.3 undecidable manual P 50 173.0934 50 -0.94 40
IV.ISPIC.EHZ. 2021-12-24T00:26:13.15 0.6 undecidable manual S 180 75.5688 50 0.85 36
IV.HVIT.HHZ. 2021-12-24T00:26:08.42 0.6 undecidable manual S 213 62.0934 50 -0.3 44
IV.HMDC.HHZ. 2021-12-24T00:26:07.57 0.6 undecidable manual S 191 56.7987 50 0.28 45
IV.RAFF.HHZ. 2021-12-24T00:26:07.88 0.6 undecidable manual S 241 54.8007 50 1.1 33
IV.MSRU.HHZ. 2021-12-24T00:26:06.62 0.3 undecidable manual P 30 103.4187 50 -0.24 62
IV.HSRS.HNN. 2021-12-24T00:26:05.59 0.6 undecidable manual S 146 49.4172 50 0.25 46
IV.MTTG.HHZ. 2021-12-24T00:26:05.19 0.3 undecidable manual P 49 91.9413 50 0.1 66
IV.GALF.HHZ. 2021-12-24T00:26:03.82 0.6 undecidable manual S 313 40.7259 50 0.8 39
IV.SSY.HHZ. 2021-12-24T00:26:02.66 0.6 undecidable manual S 156 36.741 50 0.71 41
IV.ISPIC.EHZ. 2021-12-24T00:26:02.45 0.1 undecidable manual P 180 75.5688 50 -0.11 90
IV.EPOZ.HHZ. 2021-12-24T00:26:02.68 0.6 undecidable manual S 47 34.0437 50 1.45 29
IV.HVZN.HHZ. 2021-12-24T00:26:01.28 0.6 undecidable manual S 208 35.6421 50 -0.37 46
IV.HAGA.HHZ. 2021-12-24T00:26:00.12 0.6 undecidable manual S 132 29.3484 107 0.21 48
IV.EVRN.HNN. 2021-12-24T00:26:00.10 0.6 undecidable manual S 38 32.3454 50 -0.67 42
IV.EMPL.HHZ. 2021-12-24T00:25:59.04 0.6 undecidable manual S 13 24.753 110 0.62 43
IV.ESLN.HHZ. 2021-12-24T00:25:59.19 0.6 undecidable manual S 13 26.4513 109 0.24 48
IV.HMDC.HHZ. 2021-12-24T00:25:59.41 0.3 undecidable manual P 191 56.7987 50 -0.26 68
IV.HVIT.HHZ. 2021-12-24T00:25:59.85 0.1 undecidable manual P 213 62.0934 50 -0.64 80
IV.HSRS.HNN. 2021-12-24T00:25:58.07 0.3 undecidable manual P 146 49.4172 50 -0.47 66
IV.ESPC.HHN. 2021-12-24T00:25:58.95 0.6 undecidable manual S 22 27.75 108 -0.44 46
IV.RAFF.HHZ. 2021-12-24T00:25:58.97 0.1 positive manual P 241 54.8007 50 -0.4 88
IV.ECHR.HNZ. 2021-12-24T00:25:58.93 0.6 undecidable manual S 1 24.9528 110 0.46 46
IV.EMCN.HHN. 2021-12-24T00:25:57.23 0.3 undecidable manual P 17 38.2284 50 0.41 68
IV.EPIT.HHN. 2021-12-24T00:25:57.73 0.3 undecidable manual P 19 41.0256 50 0.49 66
IT.LNT.HGZ. 2021-12-24T00:25:57.51 0.3 undecidable manual S 156 20.9679 114 0.34 71
IV.EMNR.HHZ. 2021-12-24T00:25:57.95 0.6 undecidable manual P 15 40.8258 50 0.74 40
IV.GALF.HHZ. 2021-12-24T00:25:57.12 0.3 undecidable manual P 313 40.7259 50 -0.08 72
IV.EPZF.HHZ. 2021-12-24T00:25:57.56 0.1 undecidable manual P 354 40.5261 50 0.4 90
IV.ESVO.HHE. 2021-12-24T00:25:56.89 0.3 undecidable manual P 6 34.743 50 0.61 64
IV.HVZN.HHZ. 2021-12-24T00:25:56.07 0.1 undecidable manual P 208 35.6421 50 -0.34 92
IV.SSY.HHZ. 2021-12-24T00:25:56.41 0.1 negative manual P 156 36.741 50 -0.17 95
IV.EMFS.HHE. 2021-12-24T00:25:56.13 0.3 undecidable manual P 16 29.748 107 0.64 64
IV.ESAL.HHE. 2021-12-24T00:25:56.69 0.3 undecidable manual P 31 38.2284 50 -0.12 72
IV.EPOZ.HHZ. 2021-12-24T00:25:56.36 0.1 undecidable manual P 47 34.0437 50 0.19 95
IV.ECBD.HHN. 2021-12-24T00:25:56.14 0.3 undecidable manual P 24 38.7279 50 -0.75 60
IV.HLNI.HHZ. 2021-12-24T00:25:55.42 0.6 undecidable manual S 194 12.876 125 0.7 43
IV.EVRN.HNN. 2021-12-24T00:25:55.60 0.3 undecidable manual P 38 32.3454 50 -0.3 70
IV.EMFO.HHE. 2021-12-24T00:25:55.69 0.6 undecidable manual P 28 34.4433 50 -0.54 44
IV.ESCV.HHZ. 2021-12-24T00:25:55.85 0.1 undecidable manual P 346 32.745 50 -0.11 97
IV.ECZM.HHN. 2021-12-24T00:25:55.57 0.3 undecidable manual P 360 29.9478 107 0.05 74
IV.HAGA.HHZ. 2021-12-24T00:25:55.10 0.1 undecidable manual P 132 29.3484 107 -0.3 94
IV.ESML.HHZ. 2021-12-24T00:25:55.42 0.6 undecidable manual S 352 17.5713 117 -0.7 43
IV.ECHR.HNZ. 2021-12-24T00:25:54.62 0.1 undecidable manual P 1 24.9528 110 0.05 100
IV.EMPL.HHZ. 2021-12-24T00:25:54.59 0.1 undecidable manual P 13 24.753 110 0.05 100
IV.ESLN.HHZ. 2021-12-24T00:25:54.80 0.1 undecidable manual P 13 26.4513 109 -0.05 100
IV.ESPC.HHN. 2021-12-24T00:25:54.57 0.1 undecidable manual P 22 27.75 108 -0.53 89
IT.LNT.HGZ. 2021-12-24T00:25:53.80 0.3 undecidable manual P 156 20.9679 114 -0.02 76
IV.HLNI.HHZ. 2021-12-24T00:25:52.64 0.1 negative manual P 194 12.876 125 0.23 98
IV.ESML.HHZ. 2021-12-24T00:25:52.86 0.1 negative manual P 352 17.5713 117 -0.35 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHE. ML:2.2 0.0009655522000000001 0.22 AML other m 2021-12-24T00:25:59.54
IV.EMPL.HHN. ML:2.5 0.0020187969999999997 0.26 AML other m 2021-12-24T00:25:59.69
IV.HAGA.HHE. ML:1.4 0.00013201925000000002 0.32 AML other m 2021-12-24T00:26:00.19
IV.HAGA.HHN. ML:1.6 0.00019353114999999998 0.38 AML other m 2021-12-24T00:26:00.48
IV.HVZN.HHN. ML:1.5 0.00013654746 0.5 AML other m 2021-12-24T00:26:01.67
IV.SSY.HHE. ML:1.8 0.0002320871 0.4 AML other m 2021-12-24T00:26:02.75
IV.EPOZ.HNE. ML:1.8 0.0003012167 0.18 AML other m 2021-12-24T00:26:02.95
IV.SSY.HHN. ML:2.1 0.00047123705000000007 0.26 AML other m 2021-12-24T00:26:02.93
IV.SSY.HNN. ML:1.6 0.00017214605 0.35 AML other m 2021-12-24T00:26:02.77
IV.EPOZ.HHN. ML:1.8 0.000275 0.22 AML other m 2021-12-24T00:26:02.84
IV.EPOZ.HHE. ML:1.8 0.0002815 0.86 AML other m 2021-12-24T00:26:03.95
IV.GALF.HHE. ML:1.6 0.00012143556 0.34 AML other m 2021-12-24T00:26:04.58
IV.HMDC.HHN. ML:1.5 0.0000650478 0.54 AML other m 2021-12-24T00:26:08.01
IV.HMDC.HHE. ML:1.5 0.00006408714 0.32 AML other m 2021-12-24T00:26:07.76
IV.RAFF.HHN. ML:1.4 0.000062194435 0.42 AML other m 2021-12-24T00:26:08.11
IV.RAFF.HHE. ML:1.4 0.00006202242 0.44 AML other m 2021-12-24T00:26:08.57
IV.ISPIC.EHN. ML:2.0 0.000136 0.34 AML other m 2021-12-24T00:26:13.71
IV.ISPIC.EHE. ML:2.0 0.0001404 0.94 AML other m 2021-12-24T00:26:13.82
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