Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 25-12-2021 and time 05:10:44 (Italy) in region 7 km W Motta Sant'Anastasia (CT)

A magnitude ML 1.2 earthquake occured in region: 7 km W Motta Sant'Anastasia (CT), on

  • 25-12-2021 04:10:44 (UTC)
  • 25-12-2021 05:10:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4890, 14.8980 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 7 12116 12116
Paternò CT 10 48228 60344
Misterbianco CT 10 49410 109754
Camporotondo Etneo CT 13 5023 114777
Belpasso CT 14 28108 142885
Santa Maria di Licodia CT 14 7641 150526
San Pietro Clarenza CT 15 7743 158269
Ragalna CT 16 3924 162193
Gravina di Catania CT 17 25838 188031
Mascalucia CT 17 31958 219989
Catania CT 17 314555 534544
Biancavilla CT 17 24007 558551
Sant'Agata li Battiati CT 18 9479 568030
Nicolosi CT 18 7463 575493
Tremestieri Etneo CT 18 20589 596082

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km W of Catania (314555 inhabitants)
28 Km SW of Acireale (52622 inhabitants)
59 Km NW of Siracusa (122291 inhabitants)
64 Km N of Ragusa (73313 inhabitants)
68 Km NE of Vittoria (63339 inhabitants)
71 Km N of Modica (54633 inhabitants)
74 Km E of Caltanissetta (63360 inhabitants)
74 Km NE of Gela (75827 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 1.2 2021-12-25
04:10:44		 37.4892 14.8975 10 2022-03-30
13:04:34		 Bollettino Sismico Italiano INGV 100466611
Reviewed
Rev100 		ML 1.2 2021-12-25
04:10:44		 37.4923 14.9148 9 2021-12-25
05:10:35		 Sala Sismica INGV-Roma 98941001
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-25 04:10:44 ± 0.08
Latitude 37.4892 ± 0.0036
Longitude 14.8975 ± 0.0102
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 100466611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 869
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
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 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.12950
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 100466611
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-01 11:51:03

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 98941001
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-25 05:10:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HVZN.HHE. 2021-12-25T04:10:57.78 0.3 undecidable manual S 205 38.0286 50 0.62 63
IV.SSY.HHZ. 2021-12-25T04:10:57.97 0.3 undecidable manual S 157 39.9267 50 0.3 68
IV.HAGA.HHE. 2021-12-25T04:10:55.50 0.3 undecidable manual S 135 32.0457 50 -0.07 73
IV.RAFF.HHZ. 2021-12-25T04:10:54.04 0.1 undecidable manual P 238 55.6998 50 -0.38 87
IV.ESPC.HHZ. 2021-12-25T04:10:53.56 0.6 undecidable manual S 27 25.2525 111 -0.06 49
IT.LNT.HGZ. 2021-12-25T04:10:53.32 0.6 undecidable manual S 157 24.0537 112 0.08 49
IV.ECHR.HNZ. 2021-12-25T04:10:53.43 0.6 undecidable manual S 4 21.9669 114 0.89 38
IV.EMPL.HHZ. 2021-12-25T04:10:52.82 0.3 undecidable manual S 17 22.0668 114 0.25 71
IV.SSY.HHZ. 2021-12-25T04:10:51.64 0.1 undecidable manual P 157 39.9267 50 -0.35 90
IV.HVZN.HHE. 2021-12-25T04:10:51.72 0.6 undecidable manual P 205 38.0286 50 0.02 49
IV.ESML.HHZ. 2021-12-25T04:10:50.02 0.3 undecidable manual S 354 14.3745 124 -0.22 73
IV.ESCV.HHZ. 2021-12-25T04:10:50.36 0.3 undecidable manual P 346 29.5482 50 -0.02 74
IV.HLNI.HHZ. 2021-12-25T04:10:50.89 0.3 undecidable manual S 188 15.7731 121 0.25 72
IV.HAGA.HHE. 2021-12-25T04:10:50.76 0.3 undecidable manual P 135 32.0457 50 -0.02 74
IV.EMPL.HHZ. 2021-12-25T04:10:49.37 0.3 undecidable manual P 17 22.0668 114 0.33 70
IV.ECHR.HNZ. 2021-12-25T04:10:49.03 0.3 undecidable manual P 4 21.9669 114 0 75
IV.ESPC.HHZ. 2021-12-25T04:10:49.39 0.3 undecidable manual P 27 25.2525 111 -0.26 71
IT.LNT.HGZ. 2021-12-25T04:10:49.14 0.3 undecidable manual P 157 24.0537 112 -0.29 71
IV.ESML.HHZ. 2021-12-25T04:10:47.48 0.1 undecidable manual P 354 14.3745 124 -0.22 97
IV.HLNI.HHZ. 2021-12-25T04:10:47.86 0.1 undecidable manual P 188 15.7731 121 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHE. ML:0.8 0.00006777519 0.1792 AML other m 2021-12-25T04:10:51.34
IV.HLNI.HHN. ML:1.2 0.00014500000000000003 0.5 AML other m 2021-12-25T04:10:51.30
IV.HLNI.HHE. ML:1.1 0.000108 0.3 AML other m 2021-12-25T04:10:51.40
IV.ESML.HHN. ML:0.8 0.0000616875 0.1792 AML other m 2021-12-25T04:10:53.41
IV.EMPL.HHN. ML:1.8 0.0004445752 0.3008 AML other m 2021-12-25T04:10:54.08
IV.EMPL.HHE. ML:1.7 0.00036787625000000003 0.2592 AML other m 2021-12-25T04:10:56.33
IV.ESCV.HHE. ML:0.8 0.000035359654999999996 0.4416 AML other m 2021-12-25T04:10:56.96
IV.SSY.HHE. ML:1.3 0.00007602404 0.2592 AML other m 2021-12-25T04:10:58.32
IV.SSY.HNN. ML:1.2 0.00004807364400000001 0.16 AML other m 2021-12-25T04:10:59.04
IV.SSY.HNE. ML:1.1 0.00004137059 0.1504 AML other m 2021-12-25T04:10:59.05
IV.SSY.HHN. ML:1.7 0.00016102749999999998 0.16 AML other m 2021-12-25T04:10:59.04
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