Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 23-12-2021 and time 22:48:17 (UTC) in region 6 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.3 earthquake occured in region: 6 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 22:48:17 (UTC)
  • 23-12-2021 23:48:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4830, 14.9190 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 6 12116 12116
Misterbianco CT 9 49410 61526
Paternò CT 11 48228 109754
Camporotondo Etneo CT 12 5023 114777
Belpasso CT 13 28108 142885
San Pietro Clarenza CT 14 7743 150628
Catania CT 15 314555 465183
Santa Maria di Licodia CT 15 7641 472824
Gravina di Catania CT 15 25838 498662
Mascalucia CT 16 31958 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
Biancavilla CT 18 24007 596082
San Giovanni la Punta CT 19 23060 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)
58 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)
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 1.3 2021-12-23
22:48:17		 37.4832 14.9187 10 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102535061
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 22:48:17 ± 0.07
Latitude 37.4832 ± 0.0036
Longitude 14.9187 ± 0.0091
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 102535061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 751
Semi-minor axis of confidence ellipse (meter) 228
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 750.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
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) 0.13850
Epicentral distance of station farthest from the epicenter (degree) 0.51261
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 102535061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 15:59:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HSRS.HNN. 2021-12-23T22:48:34.54 0.6 undecidable manual S 148 50.9157 50 0.21 45
IV.SSY.HNN. 2021-12-23T22:48:32.03 0.6 undecidable manual S 159 38.628 50 0.99 35
IV.GALF.HHZ. 2021-12-23T22:48:31.70 0.6 undecidable manual S 309 39.9267 50 0.31 45
IV.HVZN.HHZ. 2021-12-23T22:48:30.84 0.6 undecidable manual S 208 38.2284 50 -0.11 47
IV.HAGA.HHZ. 2021-12-23T22:48:28.90 0.6 undecidable manual S 136 30.2475 50 0.08 48
IV.ESLN.HHZ. 2021-12-23T22:48:27.09 0.6 undecidable manual S 12 23.8539 112 0.22 47
IT.LNT.HGZ. 2021-12-23T22:48:27.02 0.6 undecidable manual S 161 22.8549 113 0.47 45
IV.EMPL.HHZ. 2021-12-23T22:48:27.05 0.6 undecidable manual S 12 22.1556 113 0.7 41
IV.RAFF.HHZ. 2021-12-23T22:48:27.90 0.3 undecidable manual P 240 56.8986 50 -0.44 64
IV.GALF.HHZ. 2021-12-23T22:48:26.00 0.3 undecidable manual P 309 39.9267 50 0.29 68
IV.ESPC.HHN. 2021-12-23T22:48:26.86 0.6 undecidable manual S 22 25.1526 111 -0.42 45
IV.HSRS.HNN. 2021-12-23T22:48:26.89 0.3 undecidable manual P 148 50.9157 50 -0.52 64
IV.EPZF.HHZ. 2021-12-23T22:48:25.58 0.3 undecidable manual P 352 38.2284 50 0.13 71
IV.SSY.HNN. 2021-12-23T22:48:25.26 0.3 undecidable manual P 159 38.628 50 -0.25 69
IV.HVZN.HHZ. 2021-12-23T22:48:25.40 0.3 undecidable manual P 208 38.2284 50 -0.06 72
IV.ESML.HHZ. 2021-12-23T22:48:24.00 0.6 undecidable manual S 347 15.3735 122 -0.24 48
IV.EPOZ.HHZ. 2021-12-23T22:48:24.64 0.3 undecidable manual P 49 31.6461 50 0.21 70
IV.HLNI.HHZ. 2021-12-23T22:48:24.75 0.6 undecidable manual S 195 15.4734 122 0.47 46
IV.ESCV.HHZ. 2021-12-23T22:48:24.22 0.3 undecidable manual P 343 30.6471 50 -0.06 73
IV.ECZM.HHN. 2021-12-23T22:48:24.18 0.3 undecidable manual P 357 27.5502 109 0.38 68
IV.ESPC.HHN. 2021-12-23T22:48:23.11 0.3 undecidable manual P 22 25.1526 111 -0.23 71
IV.HAGA.HHZ. 2021-12-23T22:48:23.84 0.3 undecidable manual P 136 30.2475 50 -0.38 68
IV.EMPL.HHZ. 2021-12-23T22:48:22.84 0.3 undecidable manual P 12 22.1556 113 0.05 74
IV.ESLN.HHZ. 2021-12-23T22:48:22.96 0.3 undecidable manual P 12 23.8539 112 -0.14 72
IT.LNT.HGZ. 2021-12-23T22:48:22.70 0.3 undecidable manual P 161 22.8549 113 -0.21 71
IV.ESML.HHZ. 2021-12-23T22:48:21.28 0.3 undecidable manual P 347 15.3735 122 -0.3 71
IV.HLNI.HHZ. 2021-12-23T22:48:21.57 0.1 negative manual P 195 15.4734 122 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHE. ML:1.8 0.00041021785 0.2432 AML other m 2021-12-23T22:48:29.85
IV.EMPL.HHN. ML:2.0 0.0007605 0.24 AML other m 2021-12-23T22:48:27.48
IV.ESML.HHE. ML:1.0 0.000084081185 0.2048 AML other m 2021-12-23T22:48:24.84
IV.ESML.HHN. ML:1.1 0.00011302336 0.1152 AML other m 2021-12-23T22:48:24.00
IV.HLNI.HHE. ML:1.4 0.00022037465 0.1408 AML other m 2021-12-23T22:48:24.88
IV.HLNI.HHN. ML:1.4 0.00023776765 0.0768 AML other m 2021-12-23T22:48:25.35
IV.HAGA.HHE. ML:1.1 0.00005441713500000001 0.2176 AML other m 2021-12-23T22:48:29.05
IV.ESCV.HHN. ML:1.3 0.00008883464500000001 0.3072 AML other m 2021-12-23T22:48:33.14
IV.ESCV.HHE. ML:1.4 0.00011095466000000001 0.256 AML other m 2021-12-23T22:48:30.92
IV.HVZN.HHE. ML:1.4 0.00008855227499999999 0.3584 AML other m 2021-12-23T22:48:36.17
IV.HVZN.HHN. ML:1.3 0.00007773248 0.3968 AML other m 2021-12-23T22:48:36.58
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