Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 24-12-2021 and time 03:54:43 (UTC) in region 9 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.4 earthquake occured in region: 9 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 03:54:43 (UTC)
  • 24-12-2021 04:54:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4690, 14.8890 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 9 12116 12116
Misterbianco CT 12 49410 61526
Paternò CT 12 48228 109754
Camporotondo Etneo CT 15 5023 114777
Belpasso CT 16 28108 142885
Santa Maria di Licodia CT 17 7641 150526
San Pietro Clarenza CT 17 7743 158269
Catania CT 18 314555 472824
Gravina di Catania CT 18 25838 498662
Ragalna CT 19 3924 502586
Mascalucia CT 19 31958 534544
Biancavilla CT 19 24007 558551
Scordia CT 19 17095 575646
Ramacca CT 20 10894 586540
Sant'Agata li Battiati CT 20 9479 596019

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Catania (314555 inhabitants)
29 Km SW of Acireale (52622 inhabitants)
58 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)
72 Km NE of Gela (75827 inhabitants)
73 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 1.4 2021-12-24
03:54:43		 37.4692 14.8893 10 2022-03-30
13:04:24		 Bollettino Sismico Italiano INGV 99053571
Reviewed
Rev100 		ML 1.4 2021-12-24
03:54:43		 37.4717 14.8925 10 2021-12-24
04:02:13		 Sala Sismica INGV-Roma 98886351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 03:54:43 ± 0.12
Latitude 37.4692 ± 0.0054
Longitude 14.8893 ± 0.0170
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 99053571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1556
Semi-minor axis of confidence ellipse (meter) 297
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 1560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.12141
Epicentral distance of station farthest from the epicenter (degree) 0.68888
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 99053571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-15 16:19:43

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 98886351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 04:02:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-12-24T03:55:07.10 0.6 undecidable manual S 179 76.4679 50 0.77 37
IV.HVIT.HHZ. 2021-12-24T03:55:02.46 0.6 undecidable manual S 212 62.0934 50 -0.03 47
IV.HMDC.HHZ. 2021-12-24T03:55:01.99 0.3 undecidable manual S 189 57.3981 50 0.75 58
IV.SSY.HHZ. 2021-12-24T03:54:56.39 0.6 undecidable manual S 155 38.2284 50 0.27 46
IV.ISPIC.EHZ. 2021-12-24T03:54:56.25 0.1 undecidable manual P 179 76.4679 50 -0.3 86
IV.ESCV.HHZ. 2021-12-24T03:54:55.19 0.6 undecidable manual S 348 31.5462 50 0.85 39
IV.HVIT.HHZ. 2021-12-24T03:54:53.86 0.3 undecidable manual P 212 62.0934 50 -0.47 64
IV.HMDC.HHZ. 2021-12-24T03:54:53.50 0.3 undecidable manual P 189 57.3981 50 -0.11 69
IV.RAFF.HHZ. 2021-12-24T03:54:52.77 0.1 undecidable manual P 240 53.9016 50 -0.31 89
IV.EMPL.HHZ. 2021-12-24T03:54:52.57 0.3 undecidable manual S 17 24.3534 112 0.27 71
IV.SSY.HHZ. 2021-12-24T03:54:50.14 0.1 undecidable manual P 155 38.2284 50 -0.52 88
IV.HLNI.HHZ. 2021-12-24T03:54:49.46 0.3 undecidable manual S 187 13.4754 126 0.49 69
IV.ESCV.HHZ. 2021-12-24T03:54:49.68 0.3 undecidable manual P 348 31.5462 50 0.05 74
IV.EPOZ.HHZ. 2021-12-24T03:54:49.95 0.3 undecidable manual P 49 34.6431 50 -0.16 72
IV.EMPL.HHZ. 2021-12-24T03:54:48.23 0.3 undecidable manual P 17 24.3534 112 -0.22 72
IV.ESML.HNE. 2021-12-24T03:54:47.07 0.3 undecidable manual P 357 16.5723 121 0.03 76
IV.HLNI.HHZ. 2021-12-24T03:54:46.42 0.1 negative manual P 187 13.4754 126 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:1.4 0.00024639865 0.1184 AML other m 2021-12-24T03:54:49.64
IV.HLNI.HHE. ML:1.4 0.00025054274999999996 0.16 AML other m 2021-12-24T03:54:49.61
IV.ESCV.HHE. ML:1.3 0.00008448769500000001 0.7584 AML other m 2021-12-24T03:54:49.40
IV.EPOZ.HNN. ML:1.3 0.00009074048500000002 0.0096 AML other m 2021-12-24T03:54:51.90
IV.EMPL.HHN. ML:1.9 0.00044897049999999993 0.2816 AML other m 2021-12-24T03:54:53.03
IV.SSY.HHE. ML:1.4 0.00008862903 0.16 AML other m 2021-12-24T03:54:57.49
IV.HMDC.HHE. ML:1.1 0.000030754705 0.4384 AML other m 2021-12-24T03:54:59.56
IV.EPOZ.HHE. ML:1.3 0.00008171876 0.4416 AML other m 2021-12-24T03:54:59.86
IV.EPOZ.HNE. ML:1.1 0.000047630975 0.0608 AML other m 2021-12-24T03:54:59.68
IV.SSY.HNN. ML:1.3 0.00008022818500000001 1.7792 AML other m 2021-12-24T03:54:59.94
IV.SSY.HHN. ML:1.8 0.00024433205 1.7792 AML other m 2021-12-24T03:54:59.94
IV.ESCV.HHN. ML:1.4 0.00012625935 1.0016 AML other m 2021-12-24T03:55:00.68
IV.SSY.HNE. ML:1.2 0.00006253082 0.2208 AML other m 2021-12-24T03:55:02.48
IV.HMDC.HHN. ML:1.2 0.00003511351 0.2208 AML other m 2021-12-24T03:55:02.78
IV.EMPL.HHE. ML:1.8 0.0003689402 1.3408 AML other m 2021-12-24T03:55:02.28
IV.EPOZ.HHN. ML:1.4 0.000094871945 1.4784 AML other m 2021-12-24T03:55:03.80
IV.HMDC.HNN. ML:1.8 0.00012837983 0.5888 AML other m 2021-12-24T03:55:03.70
IV.HVIT.HHN. ML:1.1 0.000023274885 0.2208 AML other m 2021-12-24T03:55:06.04
IV.HVIT.HHE. ML:1.0 0.000020830304500000002 0.24 AML other m 2021-12-24T03:55:08.44
IV.HMDC.HNE. ML:1.9 0.0001676318 1.1104 AML other m 2021-12-24T03:55:08.20
IV.ISPIC.EHE. ML:1.4 0.00003286259 0.4192 AML other m 2021-12-24T03:55:12.40
IV.ISPIC.HNN. ML:2.0 0.0001611912 0.8192 AML other m 2021-12-24T03:55:14.72
IV.ISPIC.HNE. ML:2.2 0.00025711859999999996 0.6112 AML other m 2021-12-24T03:55:21.40
IV.ISPIC.EHN. ML:1.6 0.000058780965 0.5376 AML other m 2021-12-24T03:55:26.63
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