Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 23-12-2021 and time 22:44:30 (UTC) in region 7 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.8 earthquake occured in region: 7 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 22:44:30 (UTC)
  • 23-12-2021 23:44:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4700, 14.9100 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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
Misterbianco CT 10 49410 61526
Paternò CT 12 48228 109754
Camporotondo Etneo CT 14 5023 114777
Belpasso CT 15 28108 142885
San Pietro Clarenza CT 15 7743 150628
Catania CT 16 314555 465183
Santa Maria di Licodia CT 17 7641 472824
Gravina di Catania CT 17 25838 498662
Mascalucia CT 17 31958 530620
Sant'Agata li Battiati CT 18 9479 540099
Ragalna CT 18 3924 544023
Tremestieri Etneo CT 19 20589 564612
Nicolosi CT 19 7463 572075
Biancavilla CT 20 24007 596082
Scordia CT 20 17095 613177

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km W of Catania (314555 inhabitants)
28 Km SW of Acireale (52622 inhabitants)
57 Km NW of Siracusa (122291 inhabitants)
63 Km N of Ragusa (73313 inhabitants)
67 Km NE of Vittoria (63339 inhabitants)
69 Km N of Modica (54633 inhabitants)
74 Km NE of Gela (75827 inhabitants)
75 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 1.8 2021-12-23
22:44:30		 37.4702 14.9097 10 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102534411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 22:44:30 ± 0.07
Latitude 37.4702 ± 0.0027
Longitude 14.9097 ± 0.0068
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 102534411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 600
Semi-minor axis of confidence ellipse (meter) 8
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 46
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) 0.12501
Epicentral distance of station farthest from the epicenter (degree) 0.92360
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 32
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 34
Type of magnitude ML
Reference to an origin 102534411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 15:39:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-12-23T22:44:54.13 0.6 undecidable manual S 180 76.5678 50 0.93 34
IV.MCPD.HHZ. 2021-12-23T22:44:53.40 0.6 undecidable manual S 348 73.7706 50 0.94 34
IV.HVIT.HHZ. 2021-12-23T22:44:49.55 0.6 undecidable manual S 213 63.0924 50 -0.07 45
IV.HMDC.HNN. 2021-12-23T22:44:48.55 0.6 undecidable manual S 191 57.7977 50 0.34 43
IV.MSRU.HHZ. 2021-12-23T22:44:47.20 0.3 undecidable manual P 31 102.5196 50 -0.23 61
IV.HSRS.HHZ. 2021-12-23T22:44:46.40 0.6 undecidable manual S 147 50.1165 50 0.24 45
IV.MTTG.HHZ. 2021-12-23T22:44:45.82 0.3 undecidable manual P 49 91.1421 50 0.13 63
IV.CSLB.HHZ. 2021-12-23T22:44:45.80 0.6 undecidable manual P 305 90.9423 50 0.13 42
IV.MPNC.HHZ. 2021-12-23T22:44:44.37 0.3 undecidable manual P 27 84.4488 50 -0.3 62
IV.SSY.HHZ. 2021-12-23T22:44:43.57 0.6 undecidable manual S 157 37.5291 50 0.77 39
IV.ISPIC.EHZ. 2021-12-23T22:44:43.39 0.1 positive manual P 180 76.5678 50 -0.05 89
IV.GALF.HHZ. 2021-12-23T22:44:43.34 0.6 undecidable manual S 312 40.2264 50 -0.18 46
IV.CROCE.HHE. 2021-12-23T22:44:43.09 0.3 undecidable manual P 205 78.1662 50 -0.59 58
IV.MCPD.HHZ. 2021-12-23T22:44:43.11 0.1 undecidable manual P 348 73.7706 50 0.1 88
IV.MSFR.HHZ. 2021-12-23T22:44:42.22 0.3 undecidable manual P 336 68.4759 50 0.02 68
IV.MUCR.HHE. 2021-12-23T22:44:41.61 0.3 undecidable manual P 357 63.5919 50 0.16 67
IV.AIO.HHZ. 2021-12-23T22:44:41.00 0.3 undecidable manual P 27 62.3931 50 -0.26 65
IV.HVIT.HHZ. 2021-12-23T22:44:40.74 0.3 undecidable manual P 213 63.0924 50 -0.63 59
IV.HMDC.HNN. 2021-12-23T22:44:40.79 0.3 undecidable manual P 191 57.7977 50 0.24 66
IV.HAGA.HHZ. 2021-12-23T22:44:40.96 0.6 undecidable manual S 133 29.8479 50 0.22 47
IV.ESPC.HHN. 2021-12-23T22:44:39.72 0.6 undecidable manual S 23 26.751 50 -0.19 47
IV.EMPL.HHZ. 2021-12-23T22:44:39.73 0.6 undecidable manual S 13 23.754 113 0.66 42
IV.RAFF.HHZ. 2021-12-23T22:44:39.91 0.1 positive manual P 241 55.5 50 -0.3 87
IV.ESLN.HHZ. 2021-12-23T22:44:39.91 0.6 undecidable manual S 13 25.4523 50 0.35 46
MN.VAE.HHZ. 2021-12-23T22:44:39.44 0.3 undecidable manual P 270 49.0176 50 0.24 67
IV.HSRS.HHZ. 2021-12-23T22:44:38.92 0.3 undecidable manual P 147 50.1165 50 -0.45 64
IV.EPZF.HHZ. 2021-12-23T22:44:38.18 0.3 undecidable manual P 353 39.5271 50 0.44 65
IT.LNT.HGZ. 2021-12-23T22:44:38.77 0.6 undecidable manual S 158 21.7671 115 0.35 46
IV.ESML.HHZ. 2021-12-23T22:44:37.14 0.6 undecidable manual S 351 16.6722 121 0.29 47
IV.EPOZ.HHZ. 2021-12-23T22:44:37.08 0.1 positive manual P 48 33.1446 50 0.32 91
IV.EPIT.HHZ. 2021-12-23T22:44:37.58 0.3 undecidable manual P 19 40.0266 50 -0.23 68
IV.SSY.HHZ. 2021-12-23T22:44:37.31 0.1 negative manual P 157 37.5291 50 -0.12 94
IV.HVZN.HHZ. 2021-12-23T22:44:37.36 0.3 undecidable manual P 208 36.6411 50 0.07 71
IV.GALF.HHZ. 2021-12-23T22:44:37.85 0.3 undecidable manual P 312 40.2264 50 0 72
IV.ECZM.HHN. 2021-12-23T22:44:36.32 0.3 undecidable manual P 359 28.9488 50 0.21 70
IV.EMFO.HHE. 2021-12-23T22:44:36.38 0.6 undecidable manual P 28 33.4443 50 -0.42 44
IV.ESCV.HHZ. 2021-12-23T22:44:36.60 0.3 undecidable manual P 345 31.8459 50 0.05 72
IV.HLNI.HHZ. 2021-12-23T22:44:36.48 0.6 undecidable manual S 194 13.875 126 0.41 46
IV.HAGA.HHZ. 2021-12-23T22:44:35.90 0.1 undecidable manual P 133 29.8479 50 -0.34 91
IV.ESPC.HHN. 2021-12-23T22:44:35.23 0.1 undecidable manual P 23 26.751 50 -0.54 87
IV.ECHR.HHE. 2021-12-23T22:44:35.06 0.3 undecidable manual P 1 23.9538 113 -0.25 70
IV.EMPL.HHZ. 2021-12-23T22:44:35.30 0.3 undecidable manual P 13 23.754 113 0.02 74
IV.ESLN.HHZ. 2021-12-23T22:44:35.53 0.1 undecidable manual P 13 25.4523 50 -0.03 98
IT.LNT.HGZ. 2021-12-23T22:44:34.71 0.1 undecidable manual P 158 21.7671 115 -0.2 95
IV.HLNI.HHZ. 2021-12-23T22:44:33.54 0.1 undecidable manual P 194 13.875 126 -0.01 100
IV.ESML.HHZ. 2021-12-23T22:44:33.80 0.3 undecidable manual P 351 16.6722 121 -0.2 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESML.HHN. ML:1.7 0.000432 1.1 AML other m 2021-12-23T22:44:40.00
IV.ESML.HNN. ML:1.7 0.000399 1.08 AML other m 2021-12-23T22:44:40.55
IV.ESML.HHE. ML:1.6 0.00038 0.84 AML other m 2021-12-23T22:44:40.78
IV.ESML.HNE. ML:1.6 0.0003445 1.44 AML other m 2021-12-23T22:44:40.07
IV.HAGA.HHE. ML:1.5 0.00016499999999999997 0.44 AML other m 2021-12-23T22:44:41.07
IV.EMPL.HHE. ML:2.2 0.0010550000000000002 0.26 AML other m 2021-12-23T22:44:42.44
IV.EPOZ.HHE. ML:1.8 0.0002415 1.08 AML other m 2021-12-23T22:44:44.02
IV.HAGA.HHN. ML:1.6 0.00021100000000000003 1.64 AML other m 2021-12-23T22:44:44.04
IV.EPOZ.HHN. ML:1.6 0.0001885 0.88 AML other m 2021-12-23T22:44:44.49
IV.EMPL.HHN. ML:2.3 0.0013700000000000001 0.24 AML other m 2021-12-23T22:44:44.47
IV.ESCV.HHE. ML:1.8 0.0003215 1.36 AML other m 2021-12-23T22:44:46.00
IV.ESCV.HHN. ML:2.0 0.000402 0.54 AML other m 2021-12-23T22:44:46.01
IV.SSY.HHE. ML:2.2 0.0006305000000000001 0.34 AML other m 2021-12-23T22:44:46.55
IV.HSRS.HHE. ML:1.5 0.0000814 0.78 AML other m 2021-12-23T22:44:46.48
IV.HVZN.HHE. ML:1.9 0.0003125 0.42 AML other m 2021-12-23T22:44:47.77
IV.EPZF.HHE. ML:1.9 0.000253 0.34 AML other m 2021-12-23T22:44:47.99
IV.SSY.HNN. ML:2.0 0.00039549999999999996 0.9 AML other m 2021-12-23T22:44:48.55
IV.SSY.HHN. ML:2.5 0.001325 0.3 AML other m 2021-12-23T22:44:48.54
IV.SSY.HNE. ML:2.0 0.00032950000000000004 0.72 AML other m 2021-12-23T22:44:48.40
IV.GALF.HHN. ML:1.8 0.00022799999999999999 0.48 AML other m 2021-12-23T22:44:49.34
IV.GALF.HHE. ML:1.7 0.000157 0.68 AML other m 2021-12-23T22:44:50.60
IV.HVZN.HHN. ML:2.0 0.0003645 1.54 AML other m 2021-12-23T22:44:51.21
IV.HSRS.HHN. ML:1.5 0.00008395 0.86 AML other m 2021-12-23T22:44:51.22
IV.HVIT.HHN. ML:1.7 0.00010714999999999999 1.68 AML other m 2021-12-23T22:44:53.91
IV.AIO.HHE. ML:1.5 0.000067 0.22 AML other m 2021-12-23T22:44:53.12
IV.EPZF.HHN. ML:1.8 0.0001985 0.46 AML other m 2021-12-23T22:44:53.29
IV.MCPD.HHE. ML:1.6 0.000055400000000000005 0.44 AML other m 2021-12-23T22:44:53.95
IV.AIO.HHN. ML:1.4 0.00004905 0.94 AML other m 2021-12-23T22:44:54.45
IV.ISPIC.EHN. ML:2.2 0.00021450000000000004 1.76 AML other m 2021-12-23T22:44:56.10
IV.ISPIC.EHE. ML:2.2 0.0002115 1.72 AML other m 2021-12-23T22:44:57.11
IV.MCPD.HHN. ML:1.4 0.000038650000000000004 0.54 AML other m 2021-12-23T22:44:57.38
IV.HVIT.HHE. ML:1.7 0.00008874999999999999 1 AML other m 2021-12-23T22:44:57.03
IV.MPNC.HHN. ML:1.6 0.000054449999999999995 0.74 AML other m 2021-12-23T22:44:59.20
IV.MPNC.HHE. ML:1.6 0.00004775 0.32 AML other m 2021-12-23T22:45:02.17
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