Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 23-12-2021 and time 21:39:51 (UTC) in region 6 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.5 earthquake occured in region: 6 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 21:39:51 (UTC)
  • 23-12-2021 22:39:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4790, 14.9230 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 6 12116 12116
Misterbianco CT 9 49410 61526
Paternò CT 11 48228 109754
Camporotondo Etneo CT 12 5023 114777
Belpasso CT 14 28108 142885
San Pietro Clarenza CT 14 7743 150628
Catania CT 15 314555 465183
Gravina di Catania CT 15 25838 491021
Mascalucia CT 16 31958 522979
Santa Maria di Licodia CT 16 7641 530620
Sant'Agata li Battiati CT 17 9479 540099
Ragalna CT 17 3924 544023
Tremestieri Etneo CT 17 20589 564612
Nicolosi CT 18 7463 572075
San Giovanni la Punta CT 19 23060 595135
Biancavilla CT 19 24007 619142
San Gregorio di Catania CT 19 11966 631108
Pedara CT 20 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)
70 Km N of Modica (54633 inhabitants)
75 Km NE of Gela (75827 inhabitants)
76 Km E of Caltanissetta (63360 inhabitants)
95 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 1.5 2021-12-23
21:39:51		 37.4792 14.9232 9 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102362091
Reviewed
Rev100 		ML 1.5 2021-12-23
21:39:51		 37.4835 14.9285 9 2021-12-23
21:48:43		 Sala Sismica INGV-Roma 98866551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 21:39:51 ± 0.06
Latitude 37.4792 ± 0.0027
Longitude 14.9232 ± 0.0079
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 102362091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 671
Semi-minor axis of confidence ellipse (meter) 348
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
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) 89
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
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) 0.69877
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 102362091
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-25 17:23:34

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 98866551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 21:48:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-12-23T21:40:16.19 0.3 undecidable manual S 181 77.5668 50 0.56 59
IV.RAFF.HHZ. 2021-12-23T21:40:11.10 0.6 undecidable manual S 240 57.0984 50 0.94 35
IV.HVIT.HHZ. 2021-12-23T21:40:11.76 0.6 undecidable manual S 213 64.5909 50 -0.41 42
IV.HMDC.HNN. 2021-12-23T21:40:10.79 0.6 undecidable manual S 192 58.9965 50 0.1 46
IV.HSRS.HNN. 2021-12-23T21:40:08.41 0.6 undecidable manual S 148 50.3163 50 0.04 47
IV.EPZF.HHZ. 2021-12-23T21:40:06.31 0.6 undecidable manual S 351 38.628 50 1.06 34
IV.ISPIC.EHZ. 2021-12-23T21:40:05.28 0.3 undecidable manual P 181 77.5668 50 -0.34 63
IV.SSY.HHZ. 2021-12-23T21:40:05.62 0.6 undecidable manual S 160 38.0286 50 0.53 43
IV.HVZN.HHZ. 2021-12-23T21:40:04.74 0.3 undecidable manual S 209 38.0286 50 -0.35 67
IV.HMDC.HNN. 2021-12-23T21:40:03.42 0.3 undecidable manual P 192 58.9965 50 0.66 59
IV.ESCV.HHZ. 2021-12-23T21:40:03.46 0.6 undecidable manual S 342 31.1466 106 0.28 46
IV.HVIT.HHZ. 2021-12-23T21:40:03.16 0.3 undecidable manual P 213 64.5909 50 -0.47 63
IV.HAGA.HHZ. 2021-12-23T21:40:02.93 0.3 undecidable manual S 136 29.748 106 0.24 70
IV.ECZM.HHZ. 2021-12-23T21:40:02.18 0.3 undecidable manual S 357 28.0497 107 0.06 73
IV.ESPC.HHZ. 2021-12-23T21:40:01.12 0.3 undecidable manual S 21 25.3524 109 -0.14 72
IV.RAFF.HHZ. 2021-12-23T21:40:01.81 0.3 undecidable manual P 240 57.0984 50 -0.65 59
IV.EMPL.HHZ. 2021-12-23T21:40:01.02 0.3 undecidable manual S 11 22.5552 111 0.69 62
MN.VAE.HHZ. 2021-12-23T21:40:01.47 0.6 undecidable manual P 269 50.2164 50 0.07 47
IV.ECHR.HNZ. 2021-12-23T21:40:00.94 0.6 undecidable manual S 358 22.9548 111 0.46 45
IT.LNT.HGZ. 2021-12-23T21:40:00.71 0.6 undecidable manual S 162 22.2555 111 0.46 45
IV.ESLN.HHZ. 2021-12-23T21:40:00.94 0.6 undecidable manual S 11 24.1536 110 0.08 49
IV.HSRS.HNN. 2021-12-23T21:40:00.78 0.3 undecidable manual P 148 50.3163 50 -0.64 60
IV.EPZF.HHZ. 2021-12-23T21:39:59.73 0.3 undecidable manual P 351 38.628 50 0.1 71
IV.GALF.HHZ. 2021-12-23T21:39:59.76 0.3 undecidable manual P 309 40.5261 50 -0.16 70
IV.HVZN.HHZ. 2021-12-23T21:39:59.59 0.3 undecidable manual P 209 38.0286 50 0.06 72
IV.SSY.HHZ. 2021-12-23T21:39:59.09 0.6 undecidable manual P 160 38.0286 50 -0.44 44
IV.EPOZ.HHZ. 2021-12-23T21:39:58.55 0.3 undecidable manual P 47 31.6461 105 0.03 73
IV.ESCV.HHZ. 2021-12-23T21:39:58.25 0.3 undecidable manual P 342 31.1466 106 -0.18 71
IV.HLNI.HHZ. 2021-12-23T21:39:58.50 0.3 undecidable manual S 197 15.1737 120 0.48 68
IV.EVRN.HHZ. 2021-12-23T21:39:57.95 0.6 undecidable manual P 39 29.8479 106 -0.22 47
IV.EMPL.HHZ. 2021-12-23T21:39:57.18 0.6 undecidable manual P 11 22.5552 111 0.39 46
IV.ESML.HHZ. 2021-12-23T21:39:57.71 0.3 undecidable manual S 346 15.873 119 -0.52 67
IV.ESLN.HHZ. 2021-12-23T21:39:57.01 0.3 undecidable manual P 11 24.1536 110 -0.09 73
IV.HAGA.HHZ. 2021-12-23T21:39:57.74 0.1 undecidable manual P 136 29.748 106 -0.4 90
IV.ECZM.HHZ. 2021-12-23T21:39:57.78 0.3 undecidable manual P 357 28.0497 107 -0.04 73
IV.ESPC.HHZ. 2021-12-23T21:39:56.90 0.3 undecidable manual P 21 25.3524 109 -0.42 68
IV.ECHR.HNZ. 2021-12-23T21:39:56.81 0.3 undecidable manual P 358 22.9548 111 -0.06 74
IT.LNT.HGZ. 2021-12-23T21:39:56.61 0.3 undecidable manual P 162 22.2555 111 -0.13 73
IV.HLNI.HHZ. 2021-12-23T21:39:55.48 0.1 negative manual P 197 15.1737 120 0.03 100
IV.ESML.HHZ. 2021-12-23T21:39:55.38 0.3 undecidable manual P 346 15.873 119 -0.19 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.7 0.00053407505 0.1408 AML other m 2021-12-23T21:39:58.76
IV.ESML.HNN. ML:1.3 0.00020902483499999998 0.192 AML other m 2021-12-23T21:39:58.75
IV.ESML.HHN. ML:1.4 0.0002245713 1.8592 AML other m 2021-12-23T21:39:59.01
IV.HLNI.HHN. ML:1.7 0.0005055000000000001 0.08 AML other m 2021-12-23T21:39:59.06
IV.ESML.HNE. ML:1.3 0.00017811426000000001 0.1536 AML other m 2021-12-23T21:39:59.47
IV.ESML.HHE. ML:1.3 0.00018954880000000002 0.1536 AML other m 2021-12-23T21:39:59.55
IV.HAGA.HHE. ML:1.2 0.00008276027999999999 0.1408 AML other m 2021-12-23T21:40:03.26
IV.EPOZ.HNE. ML:1.2 0.00007412367 0.064 AML other m 2021-12-23T21:40:04.84
IV.EPOZ.HHN. ML:1.3 0.00009044134000000001 0.32 AML other m 2021-12-23T21:40:04.84
IV.ESCV.HHE. ML:1.6 0.00020483295 0.2944 AML other m 2021-12-23T21:40:04.85
IV.EVRN.HHE. ML:1.5 0.00015616615 0.1664 AML other m 2021-12-23T21:40:05.30
IV.HAGA.HHN. ML:1.2 0.00007882389 0.2432 AML other m 2021-12-23T21:40:05.92
IV.EVRN.HNE. ML:1.5 0.0001584225 1.552 AML other m 2021-12-23T21:40:06.80
IV.EVRN.HHN. ML:1.5 0.0001534566 0.2432 AML other m 2021-12-23T21:40:06.83
IV.GALF.HHE. ML:1.6 0.00013699629 1.68 AML other m 2021-12-23T21:40:07.89
IV.ESCV.HHN. ML:1.7 0.00023199064999999998 0.2432 AML other m 2021-12-23T21:40:07.23
IV.GALF.HHN. ML:1.6 0.00014770595 0.3328 AML other m 2021-12-23T21:40:07.39
IV.EVRN.HNN. ML:1.6 0.00017260815 0.2048 AML other m 2021-12-23T21:40:07.65
IV.EPOZ.HNN. ML:1.2 0.00007752281499999999 0.1408 AML other m 2021-12-23T21:40:08.96
IV.HVZN.HHE. ML:1.6 0.0001472948 1.6032 AML other m 2021-12-23T21:40:09.85
IV.SSY.HHE. ML:1.6 0.000154980425 0.128 AML other m 2021-12-23T21:40:10.14
IV.SSY.HHN. ML:2.1 0.0004954576499999999 0.2176 AML other m 2021-12-23T21:40:11.56
IV.SSY.HNN. ML:1.6 0.000151791255 0.2048 AML other m 2021-12-23T21:40:11.57
IV.SSY.HNE. ML:1.5 0.000108053365 0.2304 AML other m 2021-12-23T21:40:11.67
IV.HVZN.HHN. ML:1.7 0.00016883045 0.4736 AML other m 2021-12-23T21:40:13.14
IV.ISPIC.EHN. ML:1.8 0.00008740283999999999 0.2304 AML other m 2021-12-23T21:40:16.77
IV.ISPIC.EHE. ML:1.9 0.000103456285 0.2816 AML other m 2021-12-23T21:40:16.91
IV.ISPIC.HNE. ML:2.3 0.00030174295 1.2192 AML other m 2021-12-23T21:40:19.96
IV.ISPIC.HNN. ML:2.1 0.00016973021500000002 1.3728 AML other m 2021-12-23T21:40:20.10
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