Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 23-12-2021 and time 22:26:47 (Italy) in region 8 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.4 earthquake occured in region: 8 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 21:26:47 (UTC)
  • 23-12-2021 22:26:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4560, 14.9250 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 8 12116 12116
Misterbianco CT 10 49410 61526
Paternò CT 14 48228 109754
Camporotondo Etneo CT 15 5023 114777
Catania CT 15 314555 429332
San Pietro Clarenza CT 16 7743 437075
Belpasso CT 16 28108 465183
Gravina di Catania CT 17 25838 491021
Mascalucia CT 17 31958 522979
Sant'Agata li Battiati CT 18 9479 532458
Santa Maria di Licodia CT 18 7641 540099
Tremestieri Etneo CT 19 20589 560688
Scordia CT 19 17095 577783
Ragalna CT 20 3924 581707
Nicolosi CT 20 7463 589170
Lentini SR 20 24085 613255

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km W of Catania (314555 inhabitants)
28 Km SW of Acireale (52622 inhabitants)
55 Km NW of Siracusa (122291 inhabitants)
61 Km N of Ragusa (73313 inhabitants)
66 Km NE of Vittoria (63339 inhabitants)
68 Km N of Modica (54633 inhabitants)
74 Km NE of Gela (75827 inhabitants)
76 Km E of Caltanissetta (63360 inhabitants)
96 Km SW of Reggio di Calabria (183035 inhabitants)
99 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 2021-12-23
21:26:47		 37.4558 14.9247 9 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102524151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 21:26:47 ± 0.11
Latitude 37.4558 ± 0.0045
Longitude 14.9247 ± 0.0136
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 102524151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1166
Semi-minor axis of confidence ellipse (meter) 75
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 94
Circular confidence region, given by single value of horizontal uncertainty (meter) 1170.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.11511
Epicentral distance of station farthest from the epicenter (degree) 0.68079
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 102524151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 08:42:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCPD.HHE. 2021-12-23T21:27:10.08 0.6 undecidable manual S 347 75.5688 50 -0.04 45
IV.ISPIC.EHZ. 2021-12-23T21:27:10.79 0.6 undecidable manual S 181 74.9694 50 0.84 36
IV.MUCR.HHE. 2021-12-23T21:27:07.71 0.6 undecidable manual S 356 65.2902 50 0.34 43
IV.AIO.HHE. 2021-12-23T21:27:06.68 0.6 undecidable manual S 25 63.2922 50 -0.14 45
IV.HVIT.HHZ. 2021-12-23T21:27:06.38 0.6 undecidable manual S 215 62.493 50 -0.25 44
IV.HSRS.HNN. 2021-12-23T21:27:03.19 0.6 undecidable manual S 147 48.1185 50 0.41 44
IV.EPZF.HHZ. 2021-12-23T21:27:02.06 0.6 undecidable manual S 352 41.2254 50 1.11 34
IV.GALF.HHZ. 2021-12-23T21:27:01.82 0.6 undecidable manual S 312 42.3243 50 0.58 42
IV.SSY.HHZ. 2021-12-23T21:27:00.35 0.6 undecidable manual S 158 35.6421 50 0.91 37
IV.ISPIC.EHZ. 2021-12-23T21:27:00.11 0.3 undecidable manual P 181 74.9694 50 -0.16 66
IV.MSFR.HHZ. 2021-12-23T21:26:59.57 0.3 undecidable manual P 336 70.4739 50 -0.01 69
IV.HVZN.HHZ. 2021-12-23T21:26:59.70 0.6 undecidable manual S 211 35.9418 50 0.18 47
IV.ESCV.HHN. 2021-12-23T21:26:59.89 0.6 undecidable manual S 343 33.744 50 0.95 37
IV.MCPD.HHE. 2021-12-23T21:26:59.78 0.3 undecidable manual P 347 75.5688 50 -0.59 59
IV.MUCR.HHE. 2021-12-23T21:26:58.79 0.3 undecidable manual P 356 65.2902 50 0.01 69
IV.HVIT.HHZ. 2021-12-23T21:26:57.49 0.3 undecidable manual P 215 62.493 50 -0.87 54
IV.ECHR.HHE. 2021-12-23T21:26:57.01 0.6 undecidable manual S 358 25.5522 110 0.53 44
IV.AIO.HHE. 2021-12-23T21:26:57.53 0.3 undecidable manual P 25 63.2922 50 -0.94 52
IV.ESLN.HHZ. 2021-12-23T21:26:56.71 0.6 undecidable manual S 9 26.751 109 -0.14 48
IV.EMPL.HHZ. 2021-12-23T21:26:56.42 0.6 undecidable manual S 9 25.0527 110 0.11 49
IV.RAFF.HHZ. 2021-12-23T21:26:56.62 0.1 undecidable manual P 243 55.8996 50 -0.73 78
IV.EPZF.HHZ. 2021-12-23T21:26:55.11 0.3 undecidable manual P 352 41.2254 50 0.03 72
IV.HSRS.HNN. 2021-12-23T21:26:55.47 0.6 undecidable manual P 147 48.1185 50 -0.66 40
IV.GALF.HHZ. 2021-12-23T21:26:55.19 0.6 undecidable manual P 312 42.3243 50 -0.05 48
IV.ECBD.HHN. 2021-12-23T21:26:55.59 0.3 undecidable manual P 22 38.7279 50 0.91 55
IV.SSY.HHZ. 2021-12-23T21:26:54.02 0.1 negative manual P 158 35.6421 50 -0.18 94
IV.HVZN.HHZ. 2021-12-23T21:26:54.18 0.3 undecidable manual P 211 35.9418 50 -0.08 72
IV.HLNI.HHZ. 2021-12-23T21:26:53.22 0.3 undecidable manual S 201 12.7761 126 0.71 63
IV.EPOZ.HHZ. 2021-12-23T21:26:53.78 0.3 undecidable manual P 44 33.3444 50 -0.08 72
IV.ESCV.HHN. 2021-12-23T21:26:53.18 0.6 undecidable manual P 343 33.744 50 -0.74 40
IV.ECHR.HHE. 2021-12-23T21:26:53.29 0.6 undecidable manual P 358 25.5522 110 0.79 40
IV.ESLN.HHZ. 2021-12-23T21:26:52.15 0.3 undecidable manual P 9 26.751 109 -0.56 65
IT.LNT.HGZ. 2021-12-23T21:26:51.52 0.3 undecidable manual P 160 19.7691 115 0.1 74
IV.EMPL.HHZ. 2021-12-23T21:26:51.96 0.3 undecidable manual P 9 25.0527 110 -0.44 68
IV.HLNI.HHZ. 2021-12-23T21:26:50.29 0.1 negative manual P 201 12.7761 126 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:1.6 0.000425 0.14 AML other m 2021-12-23T21:26:53.45
IV.HLNI.HHN. ML:1.3 0.00020250000000000002 0.1 AML other m 2021-12-23T21:26:53.51
IV.EMPL.HHN. ML:1.7 0.00031475595 0.2432 AML other m 2021-12-23T21:26:56.84
IV.EMPL.HHE. ML:1.7 0.00031000415000000006 0.1792 AML other m 2021-12-23T21:27:00.45
IV.SSY.HNN. ML:1.3 0.00007330379500000001 0.128 AML other m 2021-12-23T21:27:05.79
IV.SSY.HHE. ML:1.5 0.00012322926 0.1152 AML other m 2021-12-23T21:27:00.46
IV.SSY.HNE. ML:1.2 0.000062089685 0.1664 AML other m 2021-12-23T21:27:03.10
IV.SSY.HHN. ML:1.8 0.0002320836 0.1408 AML other m 2021-12-23T21:27:05.72
IV.HVZN.HHN. ML:1.3 0.00008275857000000001 0.4608 AML other m 2021-12-23T21:27:05.06
IV.GALF.HHE. ML:1.2 0.000048012895 0.6016 AML other m 2021-12-23T21:27:04.03
IV.GALF.HHN. ML:1.3 0.000068348585 0.576 AML other m 2021-12-23T21:27:12.46
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