Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 24-12-2021 and time 01:33:24 (UTC) in region 6 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.6 earthquake occured in region: 6 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 01:33:24 (UTC)
  • 24-12-2021 02:33:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4710, 14.9300 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 12 48228 109754
Camporotondo Etneo CT 13 5023 114777
San Pietro Clarenza CT 14 7743 122520
Belpasso CT 14 28108 150628
Catania CT 14 314555 465183
Gravina di Catania CT 15 25838 491021
Mascalucia CT 16 31958 522979
Santa Maria di Licodia CT 17 7641 530620
Sant'Agata li Battiati CT 17 9479 540099
Tremestieri Etneo CT 17 20589 560688
Ragalna CT 18 3924 564612
Nicolosi CT 18 7463 572075
San Giovanni la Punta CT 19 23060 595135
San Gregorio di Catania CT 19 11966 607101
Biancavilla CT 20 24007 631108
Pedara CT 20 14102 645210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Catania (314555 inhabitants)
26 Km SW of Acireale (52622 inhabitants)
56 Km NW of Siracusa (122291 inhabitants)
63 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)
77 Km E of Caltanissetta (63360 inhabitants)
95 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
01:33:24		 37.4713 14.9298 9 2022-03-30
13:04:24		 Bollettino Sismico Italiano INGV 99053071
Reviewed
Rev100 		ML 1.7 2021-12-24
01:33:24		 37.4628 14.9497 8 2021-12-24
01:39:31		 Sala Sismica INGV-Roma 98881261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 01:33:24 ± 0.07
Latitude 37.4713 ± 0.0027
Longitude 14.9298 ± 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 99053071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 195
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
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) 90
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) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.13130
Epicentral distance of station farthest from the epicenter (degree) 0.91371
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 31
Type of magnitude ML
Reference to an origin 99053071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-15 15:49:18

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 98881261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 01:39:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MSRU.HHZ. 2021-12-24T01:33:56.00 0.6 undecidable manual S 30 101.4207 50 1.54 25
IV.MPNC.HHZ. 2021-12-24T01:33:49.81 0.6 undecidable manual S 26 83.5497 50 0.12 45
IV.ISPIC.EHZ. 2021-12-24T01:33:48.58 0.6 undecidable manual S 182 76.6677 50 0.73 38
IV.MCPD.HHZ. 2021-12-24T01:33:47.50 0.6 undecidable manual S 346 74.0703 50 0.36 43
IV.MUCR.HHZ. 2021-12-24T01:33:45.27 0.6 undecidable manual S 356 63.5919 50 0.91 37
IV.RAFF.HHZ. 2021-12-24T01:33:43.47 0.3 undecidable manual S 241 57.1983 50 0.83 57
IV.HMDC.HHZ. 2021-12-24T01:33:43.12 0.6 undecidable manual S 193 58.2972 50 0.18 46
IV.AIO.HHZ. 2021-12-24T01:33:43.93 0.6 undecidable manual S 26 61.494 50 0.14 46
IV.MSRU.HHZ. 2021-12-24T01:33:41.55 0.3 undecidable manual P 30 101.4207 50 -0.24 62
IV.HSRS.HHZ. 2021-12-24T01:33:40.89 0.6 undecidable manual S 148 49.3173 50 0.36 45
IV.GALF.HHZ. 2021-12-24T01:33:39.26 0.6 undecidable manual S 310 41.5251 50 0.79 40
IV.EPZF.HHZ. 2021-12-24T01:33:39.30 0.6 undecidable manual S 351 39.627 50 1.34 31
IV.SSY.HHZ. 2021-12-24T01:33:38.04 0.6 undecidable manual S 160 37.0296 50 0.78 41
IV.MPNC.HHZ. 2021-12-24T01:33:38.61 0.1 negative manual P 26 83.5497 50 -0.42 82
IV.MCPD.HHZ. 2021-12-24T01:33:37.11 0.3 undecidable manual P 346 74.0703 50 -0.45 62
IV.ISPIC.EHZ. 2021-12-24T01:33:37.70 0.1 undecidable manual P 182 76.6677 50 -0.26 86
IV.EPOZ.HHZ. 2021-12-24T01:33:37.54 0.6 undecidable manual S 46 31.8459 50 1.67 25
IV.HVZN.HHZ. 2021-12-24T01:33:37.03 0.6 undecidable manual S 210 37.629 50 -0.39 45
IV.ESCV.HHZ. 2021-12-24T01:33:37.04 0.6 undecidable manual S 342 32.2455 50 1.07 36
IV.MUCR.HHZ. 2021-12-24T01:33:36.06 0.3 undecidable manual P 356 63.5919 50 0.11 69
IV.HAGA.HHZ. 2021-12-24T01:33:35.40 0.6 undecidable manual S 136 28.6491 107 0.51 44
IV.ECZM.HHN. 2021-12-24T01:33:35.48 0.6 undecidable manual S 356 28.9488 107 0.5 44
IV.EVRN.HHZ. 2021-12-24T01:33:35.38 0.6 undecidable manual S 37 30.1476 107 -0.02 50
IV.HMDC.HHZ. 2021-12-24T01:33:35.51 0.3 undecidable manual P 193 58.2972 50 0.38 66
IV.AIO.HHZ. 2021-12-24T01:33:35.20 0.3 undecidable manual P 26 61.494 50 -0.43 64
IV.RAFF.HHZ. 2021-12-24T01:33:34.32 0.1 positive manual P 241 57.1983 50 -0.64 80
IV.ESLN.HHZ. 2021-12-24T01:33:34.01 0.6 undecidable manual S 9 24.9528 110 0.34 46
IV.ECHR.HNZ. 2021-12-24T01:33:33.62 0.6 undecidable manual S 356 23.8539 111 0.29 47
IV.EMPL.HHZ. 2021-12-24T01:33:33.92 0.6 undecidable manual S 9 23.3544 111 0.78 39
IT.LNT.HGZ. 2021-12-24T01:33:33.14 0.6 undecidable manual S 163 21.2676 113 0.66 42
IV.ESPC.HHZ. 2021-12-24T01:33:33.86 0.6 undecidable manual S 19 25.9518 109 -0.15 49
IV.ECTS.HHZ. 2021-12-24T01:33:33.16 0.3 undecidable manual P 20 48.5181 50 -0.47 65
IV.HSRS.HHZ. 2021-12-24T01:33:33.40 0.3 undecidable manual P 148 49.3173 50 -0.34 67
MN.VAE.HHZ. 2021-12-24T01:33:33.98 0.3 undecidable manual P 270 50.8158 50 0.01 72
IV.EMNR.HHZ. 2021-12-24T01:33:32.28 0.3 undecidable manual P 12 39.2274 50 0.08 73
IV.EFIU.HHE. 2021-12-24T01:33:32.55 0.3 undecidable manual P 35 43.0236 50 -0.23 69
IV.GALF.HHZ. 2021-12-24T01:33:32.04 0.3 undecidable manual P 310 41.5251 50 -0.51 65
IV.EPZF.HHZ. 2021-12-24T01:33:32.39 0.3 undecidable manual P 351 39.627 50 0.13 72
IV.EPIT.HHN. 2021-12-24T01:33:32.04 0.3 undecidable manual P 16 39.3273 50 -0.17 71
IV.EPOZ.HHZ. 2021-12-24T01:33:31.28 0.1 positive manual P 46 31.8459 50 0.23 95
IV.ESML.HHZ. 2021-12-24T01:33:31.03 0.6 undecidable manual S 345 16.872 118 -0.08 51
IV.EMFO.HHE. 2021-12-24T01:33:31.02 0.6 undecidable manual P 26 32.5452 50 -0.14 48
IV.SSY.HHZ. 2021-12-24T01:33:31.69 0.1 negative manual P 160 37.0296 50 -0.17 95
IV.ESCV.HHZ. 2021-12-24T01:33:31.10 0.1 positive manual P 342 32.2455 50 -0.01 99
IV.ESVO.HHE. 2021-12-24T01:33:31.48 0.3 undecidable manual P 3 33.5442 50 0.17 72
IV.HVZN.HHZ. 2021-12-24T01:33:31.46 0.1 undecidable manual P 210 37.629 50 -0.48 88
IV.EVRN.HHZ. 2021-12-24T01:33:30.51 0.3 undecidable manual P 37 30.1476 107 -0.27 71
IV.EMFS.HHZ. 2021-12-24T01:33:30.32 0.6 undecidable manual P 12 28.1496 108 -0.08 50
IV.ECBD.HHN. 2021-12-24T01:33:30.91 0.3 undecidable manual P 22 36.9297 50 -0.93 55
IV.EMCN.HHN. 2021-12-24T01:33:30.85 0.6 undecidable manual P 14 36.6411 50 -0.94 36
IV.HAGA.HHZ. 2021-12-24T01:33:30.34 0.1 negative manual P 136 28.6491 107 -0.14 98
IV.HLNI.HHZ. 2021-12-24T01:33:30.90 0.6 undecidable manual S 201 14.5743 122 0.49 44
IV.ECZM.HHN. 2021-12-24T01:33:30.38 0.3 undecidable manual P 356 28.9488 107 -0.16 73
IT.LNT.HGZ. 2021-12-24T01:33:29.14 0.1 undecidable manual P 163 21.2676 113 0.05 99
IV.EMPL.HHZ. 2021-12-24T01:33:29.54 0.1 undecidable manual P 9 23.3544 111 0.07 99
IV.ESPC.HHZ. 2021-12-24T01:33:29.49 0.1 positive manual P 19 25.9518 109 -0.49 91
IV.ECHR.HNZ. 2021-12-24T01:33:29.45 0.1 undecidable manual P 356 23.8539 111 -0.13 99
IV.ESLN.HHZ. 2021-12-24T01:33:29.71 0.1 undecidable manual P 9 24.9528 110 -0.07 100
IV.ESML.HHZ. 2021-12-24T01:33:27.95 0.1 undecidable manual P 345 16.872 118 -0.35 96
IV.HLNI.HHZ. 2021-12-24T01:33:27.95 0.1 negative manual P 201 14.5743 122 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:2.0 0.0009274552000000001 0.16 AML other m 2021-12-24T01:33:31.15
IV.HLNI.HHN. ML:1.8 0.0005994999999999999 0.16 AML other m 2021-12-24T01:33:31.28
IV.ESML.HHN. ML:1.2 0.00013277822999999998 0.26 AML other m 2021-12-24T01:33:31.71
IV.ESML.HHE. ML:1.4 0.00023666595 0.2 AML other m 2021-12-24T01:33:31.80
IV.ESML.HNE. ML:1.4 0.00019832126 0.22 AML other m 2021-12-24T01:33:31.70
IV.ESML.HNN. ML:1.2 0.000159168315 0.1504 AML other m 2021-12-24T01:33:31.72
IV.EMPL.HHE. ML:2.1 0.0008716323 0.2 AML other m 2021-12-24T01:33:34.27
IV.EMPL.HHN. ML:2.3 0.0013221910000000001 0.26 AML other m 2021-12-24T01:33:34.41
IV.HAGA.HHE. ML:1.4 0.000130058015 0.18 AML other m 2021-12-24T01:33:35.50
IV.HAGA.HHN. ML:1.4 0.000130688315 0.12 AML other m 2021-12-24T01:33:35.56
IV.EVRN.HHN. ML:1.7 0.0002466573 0.16 AML other m 2021-12-24T01:33:36.02
IV.EVRN.HNN. ML:1.7 0.00026591319999999996 0.1592 AML other m 2021-12-24T01:33:36.02
IV.ESCV.HHE. ML:1.7 0.00024166155 0.86 AML other m 2021-12-24T01:33:37.74
IV.SSY.HHE. ML:1.8 0.0002721826 0.22 AML other m 2021-12-24T01:33:38.20
IV.GALF.HHE. ML:1.5 0.00011030354500000001 0.38 AML other m 2021-12-24T01:33:39.58
IV.EPZF.HHE. ML:1.8 0.00020192165 0.8 AML other m 2021-12-24T01:33:39.92
IV.GALF.HHN. ML:1.6 0.0001395709 0.32 AML other m 2021-12-24T01:33:40.24
IV.EPZF.HHN. ML:1.7 0.00016406185 0.94 AML other m 2021-12-24T01:33:39.77
IV.HSRS.HHN. ML:1.4 0.000063577645 0.38 AML other m 2021-12-24T01:33:41.23
IV.RAFF.HHE. ML:1.4 0.00005338864 0.28 AML other m 2021-12-24T01:33:44.03
IV.AIO.HHE. ML:1.2 0.000030573114999999995 0.4 AML other m 2021-12-24T01:33:44.22
IV.AIO.HHN. ML:1.1 0.000025393215 0.22 AML other m 2021-12-24T01:33:44.92
IV.MUCR.HHE. ML:1.6 0.00007159999999999999 0.82 AML other m 2021-12-24T01:33:45.10
IV.MUCR.HHN. ML:1.5 0.00006135 1.62 AML other m 2021-12-24T01:33:45.86
IV.MCPD.HHE. ML:1.3 0.000029949999999999996 0.5 AML other m 2021-12-24T01:33:47.65
IV.ISPIC.EHE. ML:1.7 0.00007990935 0.26 AML other m 2021-12-24T01:33:48.82
IV.ISPIC.EHN. ML:2.0 0.00014816219999999998 0.52 AML other m 2021-12-24T01:33:49.15
IV.MCPD.HHN. ML:1.4 0.00003585 0.42 AML other m 2021-12-24T01:33:49.34
IV.MPNC.HHN. ML:1.5 0.00004163803 0.4 AML other m 2021-12-24T01:33:49.95
IV.MSRU.HHN. ML:1.6 0.00003818937 0.34 AML other m 2021-12-24T01:33:56.43
IV.MPNC.HHE. ML:1.4 0.00003565 0.78 AML other m 2021-12-24T01:34:01.49
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