Earthquake with magnitude of ML 1.6 on date 24-12-2021 and time 02:33:24 (Italy) in region 6 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.6 earthquake occured in region: 6 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 01:33:24 (UTC)
  • 24-12-2021 02:33:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4710, 14.9300 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.

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 12 48228 109754
Camporotondo Etneo CT 13 5023 114777
San Pietro Clarenza CT 14 7743 122520
Belpasso CT 14 28108 150628
Catania CT 14 314555 465183
Gravina di Catania CT 15 25838 491021
Mascalucia CT 16 31958 522979
Sant'Agata li Battiati CT 17 9479 532458
Santa Maria di Licodia CT 17 7641 540099
Tremestieri Etneo CT 17 20589 560688
Ragalna CT 18 3924 564612
Nicolosi CT 18 7463 572075
San Giovanni la Punta CT 19 23060 595135
San Gregorio di Catania CT 19 11966 607101
Biancavilla CT 20 24007 631108
Pedara CT 20 14102 645210

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Catania (314555 inhabitants)
26 Km SW of Acireale (52622 inhabitants)
56 Km NW of Siracusa (122291 inhabitants)
63 Km N of Ragusa (73313 inhabitants)
68 Km NE of Vittoria (63339 inhabitants)
70 Km N of Modica (54633 inhabitants)
75 Km NE of Gela (75827 inhabitants)
77 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

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.6 2021-12-24
01:33:24
37.4713 14.9298 9 2022-03-30
13:04:24
Bollettino Sismico Italiano INGV 99053071
Reviewed
Rev100
ML 1.7 2021-12-24
01:33:24
37.4628 14.9497 8 2021-12-24
01:39:31
Sala Sismica INGV-Roma 98881261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 01:33:24 ± 0.07
Latitude 37.4713 ± 0.0027
Longitude 14.9298 ± 0.0079
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 99053071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 669
Semi-minor axis of confidence ellipse (meter) 195
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 60
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.13130
Epicentral distance of station farthest from the epicenter (degree) 0.91371
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:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 31
Type of magnitude ML
Reference to an origin 99053071
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-15 15:49:18

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 32
Type of magnitude ML
Reference to an origin 98881261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 01:39:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MSRU.HHZ. 2021-12-24T01:33:56.00 0.6 undecidable manual S 30 0.9137 50 1.54 25
IV.MPNC.HHZ. 2021-12-24T01:33:49.81 0.6 undecidable manual S 26 0.7527 50 0.12 45
IV.ISPIC.EHZ. 2021-12-24T01:33:48.58 0.6 undecidable manual S 182 0.6907 50 0.73 38
IV.MCPD.HHZ. 2021-12-24T01:33:47.50 0.6 undecidable manual S 346 0.6673 50 0.36 43
IV.MUCR.HHZ. 2021-12-24T01:33:45.27 0.6 undecidable manual S 356 0.5729 50 0.91 37
IV.RAFF.HHZ. 2021-12-24T01:33:43.47 0.3 undecidable manual S 241 0.5153 50 0.83 57
IV.HMDC.HHZ. 2021-12-24T01:33:43.12 0.6 undecidable manual S 193 0.5252 50 0.18 46
IV.AIO.HHZ. 2021-12-24T01:33:43.93 0.6 undecidable manual S 26 0.5540 50 0.14 46
IV.MSRU.HHZ. 2021-12-24T01:33:41.55 0.3 undecidable manual P 30 0.9137 50 -0.24 62
IV.HSRS.HHZ. 2021-12-24T01:33:40.89 0.6 undecidable manual S 148 0.4443 50 0.36 45
IV.GALF.HHZ. 2021-12-24T01:33:39.26 0.6 undecidable manual S 310 0.3741 50 0.79 40
IV.EPZF.HHZ. 2021-12-24T01:33:39.30 0.6 undecidable manual S 351 0.3570 50 1.34 31
IV.SSY.HHZ. 2021-12-24T01:33:38.04 0.6 undecidable manual S 160 0.3336 50 0.78 41
IV.MPNC.HHZ. 2021-12-24T01:33:38.61 0.1 negative manual P 26 0.7527 50 -0.42 82
IV.ESCV.HHZ. 2021-12-24T01:33:37.04 0.6 undecidable manual S 342 0.2905 50 1.07 36
IV.MCPD.HHZ. 2021-12-24T01:33:37.11 0.3 undecidable manual P 346 0.6673 50 -0.45 62
IV.ISPIC.EHZ. 2021-12-24T01:33:37.70 0.1 undecidable manual P 182 0.6907 50 -0.26 86
IV.EPOZ.HHZ. 2021-12-24T01:33:37.54 0.6 undecidable manual S 46 0.2869 50 1.67 25
IV.HVZN.HHZ. 2021-12-24T01:33:37.03 0.6 undecidable manual S 210 0.3390 50 -0.39 45
IV.MUCR.HHZ. 2021-12-24T01:33:36.06 0.3 undecidable manual P 356 0.5729 50 0.11 69
IV.AIO.HHZ. 2021-12-24T01:33:35.20 0.3 undecidable manual P 26 0.5540 50 -0.43 64
IV.HAGA.HHZ. 2021-12-24T01:33:35.40 0.6 undecidable manual S 136 0.2581 107 0.51 44
IV.ECZM.HHN. 2021-12-24T01:33:35.48 0.6 undecidable manual S 356 0.2608 107 0.5 44
IV.EVRN.HHZ. 2021-12-24T01:33:35.38 0.6 undecidable manual S 37 0.2716 107 -0.02 50
IV.HMDC.HHZ. 2021-12-24T01:33:35.51 0.3 undecidable manual P 193 0.5252 50 0.38 66
IV.RAFF.HHZ. 2021-12-24T01:33:34.32 0.1 positive manual P 241 0.5153 50 -0.64 80
IV.ESLN.HHZ. 2021-12-24T01:33:34.01 0.6 undecidable manual S 9 0.2248 110 0.34 46
IV.HSRS.HHZ. 2021-12-24T01:33:33.40 0.3 undecidable manual P 148 0.4443 50 -0.34 67
MN.VAE.HHZ. 2021-12-24T01:33:33.98 0.3 undecidable manual P 270 0.4578 50 0.01 72
IV.ECHR.HNZ. 2021-12-24T01:33:33.62 0.6 undecidable manual S 356 0.2149 111 0.29 47
IV.EMPL.HHZ. 2021-12-24T01:33:33.92 0.6 undecidable manual S 9 0.2104 111 0.78 39
IT.LNT.HGZ. 2021-12-24T01:33:33.14 0.6 undecidable manual S 163 0.1916 113 0.66 42
IV.ESPC.HHZ. 2021-12-24T01:33:33.86 0.6 undecidable manual S 19 0.2338 109 -0.15 49
IV.ECTS.HHZ. 2021-12-24T01:33:33.16 0.3 undecidable manual P 20 0.4371 50 -0.47 65
IV.EPIT.HHN. 2021-12-24T01:33:32.04 0.3 undecidable manual P 16 0.3543 50 -0.17 71
IV.EMNR.HHZ. 2021-12-24T01:33:32.28 0.3 undecidable manual P 12 0.3534 50 0.08 73
IV.EFIU.HHE. 2021-12-24T01:33:32.55 0.3 undecidable manual P 35 0.3876 50 -0.23 69
IV.GALF.HHZ. 2021-12-24T01:33:32.04 0.3 undecidable manual P 310 0.3741 50 -0.51 65
IV.EPZF.HHZ. 2021-12-24T01:33:32.39 0.3 undecidable manual P 351 0.3570 50 0.13 72
IV.EPOZ.HHZ. 2021-12-24T01:33:31.28 0.1 positive manual P 46 0.2869 50 0.23 95
IV.ESML.HHZ. 2021-12-24T01:33:31.03 0.6 undecidable manual S 345 0.1520 118 -0.08 51
IV.EMFO.HHE. 2021-12-24T01:33:31.02 0.6 undecidable manual P 26 0.2932 50 -0.14 48
IV.SSY.HHZ. 2021-12-24T01:33:31.69 0.1 negative manual P 160 0.3336 50 -0.17 95
IV.ESCV.HHZ. 2021-12-24T01:33:31.10 0.1 positive manual P 342 0.2905 50 -0.01 99
IV.ESVO.HHE. 2021-12-24T01:33:31.48 0.3 undecidable manual P 3 0.3022 50 0.17 72
IV.HVZN.HHZ. 2021-12-24T01:33:31.46 0.1 undecidable manual P 210 0.3390 50 -0.48 88
IV.EVRN.HHZ. 2021-12-24T01:33:30.51 0.3 undecidable manual P 37 0.2716 107 -0.27 71
IV.EMFS.HHZ. 2021-12-24T01:33:30.32 0.6 undecidable manual P 12 0.2536 108 -0.08 50
IV.ECBD.HHN. 2021-12-24T01:33:30.91 0.3 undecidable manual P 22 0.3327 50 -0.93 55
IV.EMCN.HHN. 2021-12-24T01:33:30.85 0.6 undecidable manual P 14 0.3301 50 -0.94 36
IV.HAGA.HHZ. 2021-12-24T01:33:30.34 0.1 negative manual P 136 0.2581 107 -0.14 98
IV.HLNI.HHZ. 2021-12-24T01:33:30.90 0.6 undecidable manual S 201 0.1313 122 0.49 44
IV.ECZM.HHN. 2021-12-24T01:33:30.38 0.3 undecidable manual P 356 0.2608 107 -0.16 73
IV.ESLN.HHZ. 2021-12-24T01:33:29.71 0.1 undecidable manual P 9 0.2248 110 -0.07 100
IT.LNT.HGZ. 2021-12-24T01:33:29.14 0.1 undecidable manual P 163 0.1916 113 0.05 99
IV.EMPL.HHZ. 2021-12-24T01:33:29.54 0.1 undecidable manual P 9 0.2104 111 0.07 99
IV.ESPC.HHZ. 2021-12-24T01:33:29.49 0.1 positive manual P 19 0.2338 109 -0.49 91
IV.ECHR.HNZ. 2021-12-24T01:33:29.45 0.1 undecidable manual P 356 0.2149 111 -0.13 99
IV.HLNI.HHZ. 2021-12-24T01:33:27.95 0.1 negative manual P 201 0.1313 122 0.05 100
IV.ESML.HHZ. 2021-12-24T01:33:27.95 0.1 undecidable manual P 345 0.1520 118 -0.35 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHE. ML:2.0 0.0009274552000000001 0.16 AML other m 2021-12-24T01:33:31.15
IV.HLNI.HHN. ML:1.8 0.0005994999999999999 0.16 AML other m 2021-12-24T01:33:31.28
IV.ESML.HHN. ML:1.2 0.00013277822999999998 0.26 AML other m 2021-12-24T01:33:31.71
IV.ESML.HHE. ML:1.4 0.00023666595 0.2 AML other m 2021-12-24T01:33:31.80
IV.ESML.HNE. ML:1.4 0.00019832126 0.22 AML other m 2021-12-24T01:33:31.70
IV.ESML.HNN. ML:1.2 0.000159168315 0.1504 AML other m 2021-12-24T01:33:31.72
IV.EMPL.HHE. ML:2.1 0.0008716323 0.2 AML other m 2021-12-24T01:33:34.27
IV.EMPL.HHN. ML:2.3 0.0013221910000000001 0.26 AML other m 2021-12-24T01:33:34.41
IV.HAGA.HHE. ML:1.4 0.000130058015 0.18 AML other m 2021-12-24T01:33:35.50
IV.HAGA.HHN. ML:1.4 0.000130688315 0.12 AML other m 2021-12-24T01:33:35.56
IV.EVRN.HHN. ML:1.7 0.0002466573 0.16 AML other m 2021-12-24T01:33:36.02
IV.EVRN.HNN. ML:1.7 0.00026591319999999996 0.1592 AML other m 2021-12-24T01:33:36.02
IV.ESCV.HHE. ML:1.7 0.00024166155 0.86 AML other m 2021-12-24T01:33:37.74
IV.SSY.HHE. ML:1.8 0.0002721826 0.22 AML other m 2021-12-24T01:33:38.20
IV.GALF.HHE. ML:1.5 0.00011030354500000001 0.38 AML other m 2021-12-24T01:33:39.58
IV.EPZF.HHE. ML:1.8 0.00020192165 0.8 AML other m 2021-12-24T01:33:39.92
IV.GALF.HHN. ML:1.6 0.0001395709 0.32 AML other m 2021-12-24T01:33:40.24
IV.EPZF.HHN. ML:1.7 0.00016406185 0.94 AML other m 2021-12-24T01:33:39.77
IV.HSRS.HHN. ML:1.4 0.000063577645 0.38 AML other m 2021-12-24T01:33:41.23
IV.RAFF.HHE. ML:1.4 0.00005338864 0.28 AML other m 2021-12-24T01:33:44.03
IV.AIO.HHE. ML:1.2 0.000030573114999999995 0.4 AML other m 2021-12-24T01:33:44.22
IV.AIO.HHN. ML:1.1 0.000025393215 0.22 AML other m 2021-12-24T01:33:44.92
IV.MUCR.HHE. ML:1.6 0.00007159999999999999 0.82 AML other m 2021-12-24T01:33:45.10
IV.MUCR.HHN. ML:1.5 0.00006135 1.62 AML other m 2021-12-24T01:33:45.86
IV.MCPD.HHE. ML:1.3 0.000029949999999999996 0.5 AML other m 2021-12-24T01:33:47.65
IV.ISPIC.EHE. ML:1.7 0.00007990935 0.26 AML other m 2021-12-24T01:33:48.82
IV.ISPIC.EHN. ML:2.0 0.00014816219999999998 0.52 AML other m 2021-12-24T01:33:49.15
IV.MCPD.HHN. ML:1.4 0.00003585 0.42 AML other m 2021-12-24T01:33:49.34
IV.MPNC.HHN. ML:1.5 0.00004163803 0.4 AML other m 2021-12-24T01:33:49.95
IV.MSRU.HHN. ML:1.6 0.00003818937 0.34 AML other m 2021-12-24T01:33:56.43
IV.MPNC.HHE. ML:1.4 0.00003565 0.78 AML other m 2021-12-24T01:34:01.49
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download