Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 23-12-2021 and time 23:35:48 (UTC) in region 7 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.9 earthquake occured in region: 7 km SW Motta Sant'Anastasia (CT), on

  • 23-12-2021 23:35:48 (UTC)
  • 24-12-2021 00:35:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4820, 14.9070 at 11 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
Misterbianco CT 10 49410 61526
Paternò CT 11 48228 109754
Camporotondo Etneo CT 13 5023 114777
Belpasso CT 14 28108 142885
San Pietro Clarenza CT 15 7743 150628
Santa Maria di Licodia CT 15 7641 158269
Catania CT 16 314555 472824
Gravina di Catania CT 16 25838 498662
Mascalucia CT 17 31958 530620
Ragalna CT 17 3924 534544
Sant'Agata li Battiati CT 18 9479 544023
Tremestieri Etneo CT 18 20589 564612
Biancavilla CT 18 24007 588619
Nicolosi CT 18 7463 596082
San Giovanni la Punta CT 20 23060 619142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km W of Catania (314555 inhabitants)
27 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)
70 Km N of Modica (54633 inhabitants)
74 Km NE of Gela (75827 inhabitants)
75 Km E of Caltanissetta (63360 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 1.9 2021-12-23
23:35:48		 37.4815 14.907 11 2022-03-30
13:04:42		 Bollettino Sismico Italiano INGV 102536571
Reviewed
Rev100 		ML 1.9 2021-12-23
23:35:48		 37.4788 14.8817 10 2021-12-23
23:43:07		 Sala Sismica INGV-Roma 98875251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-23 23:35:48 ± 0.09
Latitude 37.4815 ± 0.0036
Longitude 14.9070 ± 0.0091
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102536571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 742
Semi-minor axis of confidence ellipse (meter) 176
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 275
Circular confidence region, given by single value of horizontal uncertainty (meter) 740.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 54
Number of defining phases 54
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) 0.13580
Epicentral distance of station farthest from the epicenter (degree) 0.91461
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 102536571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-29 16:45:51

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 98875251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-23 23:43:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-12-23T23:36:12.61 0.1 undecidable manual S 180 77.7666 50 0.75 37
IV.RAFF.HHZ. 2021-12-23T23:36:07.64 0.1 undecidable manual S 239 55.9995 50 1.6 25
IV.HMDC.HHZ. 2021-12-23T23:36:07.15 0.1 undecidable manual S 191 58.9965 50 0.3 44
IV.HSRS.HHZ. 2021-12-23T23:36:05.10 0.1 undecidable manual S 147 51.3153 50 0.31 44
IV.MSRU.HHZ. 2021-12-23T23:36:05.65 0.1 undecidable manual P 31 101.5206 50 -0.02 64
IV.MILZ.HHN. 2021-12-23T23:36:04.00 0.1 undecidable manual P 18 92.1411 50 -0.21 63
IV.MTTG.HHZ. 2021-12-23T23:36:03.82 0.1 undecidable manual P 50 90.4428 50 -0.14 64
IV.SSY.HHZ. 2021-12-23T23:36:02.24 0.1 undecidable manual S 158 38.8278 50 0.78 39
IV.MPNC.HHZ. 2021-12-23T23:36:02.25 0.1 undecidable manual P 28 83.4498 50 -0.63 57
IV.HVZN.HHZ. 2021-12-23T23:36:01.44 0.1 undecidable manual S 207 37.629 50 0.29 46
IV.CROCE.HHZ. 2021-12-23T23:36:01.61 0.1 undecidable manual P 205 79.1652 50 -0.61 58
IV.MCPD.HHZ. 2021-12-23T23:36:01.08 0.1 undecidable manual P 348 72.4719 50 -0.11 66
IV.ISPIC.EHZ. 2021-12-23T23:36:01.91 0.1 undecidable manual P 180 77.7666 50 -0.1 88
IV.EPOZ.HHZ. 2021-12-23T23:36:01.30 0.1 undecidable manual S 49 32.5452 50 1.51 27
IV.EPZF.HHZ. 2021-12-23T23:36:01.36 0.1 undecidable manual S 353 38.2284 50 0.05 48
IV.MSFR.HHZ. 2021-12-23T23:36:00.53 0.1 undecidable manual P 336 67.2771 50 0.15 44
IV.GALF.HHZ. 2021-12-23T23:36:00.46 0.1 undecidable manual S 310 39.2274 50 -1.12 32
IV.HAGA.HHZ. 2021-12-23T23:35:59.62 0.1 undecidable manual S 135 30.8469 50 0.28 46
IV.ECZM.HHN. 2021-12-23T23:35:59.97 0.1 undecidable manual S 359 27.75 50 1.47 28
IV.AIO.HHZ. 2021-12-23T23:35:59.18 0.1 undecidable manual P 28 61.3941 50 -0.3 87
IV.HVIT.HHZ. 2021-12-23T23:35:59.25 0.1 undecidable manual P 212 63.9915 50 -0.64 59
IV.HMDC.HHZ. 2021-12-23T23:35:59.28 0.1 undecidable manual P 191 58.9965 50 0.17 67
IV.EVRN.HNN. 2021-12-23T23:35:59.47 0.1 undecidable manual S 41 30.5472 50 0.21 47
IV.ESLN.HHZ. 2021-12-23T23:35:58.04 0.1 undecidable manual S 14 24.2535 50 0.47 45
IV.RAFF.HHZ. 2021-12-23T23:35:58.41 0.1 undecidable manual P 239 55.9995 50 -0.24 89
IV.EMPL.HHZ. 2021-12-23T23:35:58.04 0.1 undecidable manual S 14 22.5552 50 0.91 38
IV.ECHR.HHE. 2021-12-23T23:35:57.17 0.1 undecidable manual S 1 22.755 50 0.01 49
IV.ESPC.HHN. 2021-12-23T23:35:57.77 0.1 undecidable manual S 24 25.6521 50 -0.18 47
IV.HSRS.HHZ. 2021-12-23T23:35:57.47 0.1 undecidable manual P 147 51.3153 50 -0.46 86
IT.LNT.HGZ. 2021-12-23T23:35:57.22 0.1 undecidable manual S 159 22.9548 50 -0.02 49
MN.VAE.HHZ. 2021-12-23T23:35:57.92 0.1 undecidable manual P 269 48.8178 50 0.39 44
IV.ECTS.HHZ. 2021-12-23T23:35:57.35 0.1 undecidable manual P 23 48.2184 50 -0.1 70
IV.EPZF.HHZ. 2021-12-23T23:35:56.58 0.1 undecidable manual P 353 38.2284 50 0.66 61
IV.GALF.HHZ. 2021-12-23T23:35:56.25 0.1 undecidable manual P 310 39.2274 50 0.18 93
IV.EPOZ.HHZ. 2021-12-23T23:35:55.30 0.1 undecidable manual P 49 32.5452 50 0.26 92
IV.ESML.HHZ. 2021-12-23T23:35:55.39 0.1 undecidable manual S 351 15.3735 125 0.36 46
IV.HVZN.HHZ. 2021-12-23T23:35:55.37 0.1 undecidable manual P 207 37.629 50 -0.45 66
IV.HLNI.HHZ. 2021-12-23T23:35:55.43 0.1 undecidable manual S 192 15.0738 125 0.48 89
IV.SSY.HHZ. 2021-12-23T23:35:55.88 0.1 undecidable manual P 158 38.8278 50 -0.12 94
IV.ESVO.HHE. 2021-12-23T23:35:55.41 0.1 undecidable manual P 6 32.5452 50 0.37 68
IV.EMNR.HHZ. 2021-12-23T23:35:55.86 0.1 undecidable manual P 16 38.628 50 -0.12 71
IV.EMFS.HHE. 2021-12-23T23:35:54.04 0.1 undecidable manual P 17 27.5502 50 -0.23 70
IV.EVRN.HNN. 2021-12-23T23:35:54.80 0.1 undecidable manual P 41 30.5472 50 0.07 72
IV.HAGA.HHZ. 2021-12-23T23:35:54.47 0.1 undecidable manual P 135 30.8469 50 -0.31 92
IV.ECZM.HHN. 2021-12-23T23:35:54.57 0.1 undecidable manual P 359 27.75 50 0.28 70
IV.ESCV.HHZ. 2021-12-23T23:35:54.69 0.1 undecidable manual P 345 30.5472 50 -0.04 73
IV.EMFO.HHE. 2021-12-23T23:35:54.22 0.1 undecidable manual P 30 32.4453 50 -0.81 58
IV.EMPL.HHZ. 2021-12-23T23:35:53.60 0.1 undecidable manual P 14 22.5552 50 0.1 97
IV.ECHR.HHE. 2021-12-23T23:35:53.38 0.1 undecidable manual P 1 22.755 50 -0.14 72
IV.ESPC.HHN. 2021-12-23T23:35:53.51 0.1 undecidable manual P 24 25.6521 50 -0.47 89
IT.LNT.HGZ. 2021-12-23T23:35:53.35 0.1 undecidable manual P 159 22.9548 50 -0.21 95
IV.ESLN.HHZ. 2021-12-23T23:35:53.74 0.1 undecidable manual P 14 24.2535 50 -0.01 99
IV.HLNI.HHZ. 2021-12-23T23:35:52.21 0.1 positive manual P 192 15.0738 125 -0.03 100
IV.ESML.HHZ. 2021-12-23T23:35:51.98 0.1 negative manual P 351 15.3735 125 -0.31 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:2.0 0.0010394999999999998 0.12 AML other m 2021-12-23T23:35:55.62
IV.HLNI.HHE. ML:2.2 0.0015699999999999998 0.2 AML other m 2021-12-23T23:35:55.57
IV.ESML.HNE. ML:1.6 0.000402 0.2 AML other m 2021-12-23T23:35:55.77
IV.ESML.HHN. ML:1.7 0.00047999999999999996 0.16 AML other m 2021-12-23T23:35:55.96
IV.ESML.HHE. ML:1.7 0.00045200000000000004 0.18 AML other m 2021-12-23T23:35:55.86
IV.ESML.HNN. ML:1.7 0.0004205 1.84 AML other m 2021-12-23T23:35:56.97
IV.EMPL.HHE. ML:2.3 0.001415 0.54 AML other m 2021-12-23T23:35:58.41
IV.EMPL.HHN. ML:2.3 0.00121 1.58 AML other m 2021-12-23T23:35:59.99
IV.EPOZ.HHN. ML:1.6 0.0001875 0.7 AML other m 2021-12-23T23:36:01.60
IV.SSY.HHE. ML:2.3 0.0007704999999999999 0.32 AML other m 2021-12-23T23:36:02.50
IV.GALF.HHE. ML:1.7 0.0001675 0.84 AML other m 2021-12-23T23:36:03.50
IV.SSY.HNN. ML:2.1 0.0004445 0.9 AML other m 2021-12-23T23:36:04.06
IV.SSY.HHN. ML:2.6 0.001495 1.28 AML other m 2021-12-23T23:36:04.99
IV.ESCV.HHE. ML:1.7 0.000262 0.46 AML other m 2021-12-23T23:36:04.53
IV.SSY.HNE. ML:2.1 0.0004545 0.38 AML other m 2021-12-23T23:36:05.00
IV.HSRS.HHN. ML:1.6 0.0000886 0.28 AML other m 2021-12-23T23:36:05.33
IV.HVZN.HHE. ML:2.0 0.00036199999999999996 0.58 AML other m 2021-12-23T23:36:05.60
IV.HSRS.HHE. ML:1.5 0.0000727 0.54 AML other m 2021-12-23T23:36:05.91
IV.GALF.HHN. ML:1.8 0.00024249999999999999 0.34 AML other m 2021-12-23T23:36:06.70
IV.EPOZ.HHE. ML:1.6 0.0001735 1.46 AML other m 2021-12-23T23:36:06.21
IV.ESCV.HHN. ML:1.9 0.00036199999999999996 0.82 AML other m 2021-12-23T23:36:07.53
IV.RAFF.HHE. ML:1.7 0.0001135 0.6 AML other m 2021-12-23T23:36:08.22
IV.RAFF.HHN. ML:1.6 0.00008724999999999999 0.24 AML other m 2021-12-23T23:36:08.11
IV.HMDC.HHE. ML:2.2 0.0003025 0.54 AML other m 2021-12-23T23:36:08.57
IV.AIO.HHE. ML:1.6 0.0000804 1.76 AML other m 2021-12-23T23:36:09.06
IV.HVIT.HHN. ML:1.9 0.0001325 0.16 AML other m 2021-12-23T23:36:09.41
IV.HVZN.HHN. ML:2.0 0.0003715 0.34 AML other m 2021-12-23T23:36:09.55
IV.HMDC.HHN. ML:2.0 0.000234 0.58 AML other m 2021-12-23T23:36:10.35
IV.AIO.HHN. ML:1.5 0.0000641 0.24 AML other m 2021-12-23T23:36:10.39
IV.MCPD.HHE. ML:1.5 0.00005485 0.4 AML other m 2021-12-23T23:36:11.66
IV.MCPD.HHN. ML:1.6 0.0000585 0.64 AML other m 2021-12-23T23:36:12.65
IV.CROCE.HHN. ML:2.0 0.0001255 1.66 AML other m 2021-12-23T23:36:12.85
IV.ISPIC.EHN. ML:2.3 0.000309 1.74 AML other m 2021-12-23T23:36:12.06
IV.ISPIC.EHE. ML:2.3 0.0002605 0.12 AML other m 2021-12-23T23:36:13.06
IV.HVIT.HHE. ML:1.8 0.0001095 0.82 AML other m 2021-12-23T23:36:13.49
IV.CROCE.HHE. ML:1.8 0.0000902 0.56 AML other m 2021-12-23T23:36:15.35
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