Earthquake with magnitude of ML 1.4 on date 24-12-2021 and time 04:54:43 (Italy) in region 9 km SW Motta Sant'Anastasia (CT)

A magnitude ML 1.4 earthquake occured in region: 9 km SW Motta Sant'Anastasia (CT), on

  • 24-12-2021 03:54:43 (UTC)
  • 24-12-2021 04:54:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.4690, 14.8890 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.

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 9 12116 12116
Misterbianco CT 12 49410 61526
Paternò CT 12 48228 109754
Camporotondo Etneo CT 15 5023 114777
Belpasso CT 16 28108 142885
Santa Maria di Licodia CT 17 7641 150526
San Pietro Clarenza CT 17 7743 158269
Catania CT 18 314555 472824
Gravina di Catania CT 18 25838 498662
Mascalucia CT 19 31958 530620
Ragalna CT 19 3924 534544
Biancavilla CT 19 24007 558551
Scordia CT 19 17095 575646
Ramacca CT 20 10894 586540
Sant'Agata li Battiati CT 20 9479 596019

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Catania (314555 inhabitants)
29 Km SW of Acireale (52622 inhabitants)
58 Km NW of Siracusa (122291 inhabitants)
62 Km N of Ragusa (73313 inhabitants)
66 Km NE of Vittoria (63339 inhabitants)
69 Km N of Modica (54633 inhabitants)
72 Km NE of Gela (75827 inhabitants)
73 Km E of Caltanissetta (63360 inhabitants)
97 Km SW of Reggio di Calabria (183035 inhabitants)
100 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 1.4 2021-12-24
03:54:43
37.4692 14.8893 10 2022-03-30
13:04:24
Bollettino Sismico Italiano INGV 99053571
Reviewed
Rev100
ML 1.4 2021-12-24
03:54:43
37.4717 14.8925 10 2021-12-24
04:02:13
Sala Sismica INGV-Roma 98886351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-24 03:54:43 ± 0.12
Latitude 37.4692 ± 0.0054
Longitude 14.8893 ± 0.0170
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 99053571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1556
Semi-minor axis of confidence ellipse (meter) 297
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 97
Circular confidence region, given by single value of horizontal uncertainty (meter) 1560.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.12141
Epicentral distance of station farthest from the epicenter (degree) 0.68888
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 98886351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-24 04:02:13

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 99053571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-15 16:19:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ISPIC.EHZ. 2021-12-24T03:55:07.10 0.6 undecidable manual S 179 0.6889 50 0.77 37
IV.HVIT.HHZ. 2021-12-24T03:55:02.46 0.6 undecidable manual S 212 0.5594 50 -0.03 47
IV.HMDC.HHZ. 2021-12-24T03:55:01.99 0.3 undecidable manual S 189 0.5171 50 0.75 58
IV.SSY.HHZ. 2021-12-24T03:54:56.39 0.6 undecidable manual S 155 0.3444 50 0.27 46
IV.ISPIC.EHZ. 2021-12-24T03:54:56.25 0.1 undecidable manual P 179 0.6889 50 -0.3 86
IV.ESCV.HHZ. 2021-12-24T03:54:55.19 0.6 undecidable manual S 348 0.2842 50 0.85 39
IV.HVIT.HHZ. 2021-12-24T03:54:53.86 0.3 undecidable manual P 212 0.5594 50 -0.47 64
IV.HMDC.HHZ. 2021-12-24T03:54:53.50 0.3 undecidable manual P 189 0.5171 50 -0.11 69
IV.RAFF.HHZ. 2021-12-24T03:54:52.77 0.1 undecidable manual P 240 0.4856 50 -0.31 89
IV.EMPL.HHZ. 2021-12-24T03:54:52.57 0.3 undecidable manual S 17 0.2194 112 0.27 71
IV.SSY.HHZ. 2021-12-24T03:54:50.14 0.1 undecidable manual P 155 0.3444 50 -0.52 88
IV.HLNI.HHZ. 2021-12-24T03:54:49.46 0.3 undecidable manual S 187 0.1214 126 0.49 69
IV.ESCV.HHZ. 2021-12-24T03:54:49.68 0.3 undecidable manual P 348 0.2842 50 0.05 74
IV.EPOZ.HHZ. 2021-12-24T03:54:49.95 0.3 undecidable manual P 49 0.3121 50 -0.16 72
IV.EMPL.HHZ. 2021-12-24T03:54:48.23 0.3 undecidable manual P 17 0.2194 112 -0.22 72
IV.ESML.HNE. 2021-12-24T03:54:47.07 0.3 undecidable manual P 357 0.1493 121 0.03 76
IV.HLNI.HHZ. 2021-12-24T03:54:46.42 0.1 negative manual P 187 0.1214 126 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.HLNI.HHN. ML:1.4 0.00024639865 0.1184 AML other m 2021-12-24T03:54:49.64
IV.HLNI.HHE. ML:1.4 0.00025054274999999996 0.16 AML other m 2021-12-24T03:54:49.61
IV.ESCV.HHE. ML:1.3 0.00008448769500000001 0.7584 AML other m 2021-12-24T03:54:49.40
IV.EPOZ.HNN. ML:1.3 0.00009074048500000002 0.0096 AML other m 2021-12-24T03:54:51.90
IV.EMPL.HHN. ML:1.9 0.00044897049999999993 0.2816 AML other m 2021-12-24T03:54:53.03
IV.SSY.HHE. ML:1.4 0.00008862903 0.16 AML other m 2021-12-24T03:54:57.49
IV.HMDC.HHE. ML:1.1 0.000030754705 0.4384 AML other m 2021-12-24T03:54:59.56
IV.EPOZ.HHE. ML:1.3 0.00008171876 0.4416 AML other m 2021-12-24T03:54:59.86
IV.EPOZ.HNE. ML:1.1 0.000047630975 0.0608 AML other m 2021-12-24T03:54:59.68
IV.SSY.HNN. ML:1.3 0.00008022818500000001 1.7792 AML other m 2021-12-24T03:54:59.94
IV.SSY.HHN. ML:1.8 0.00024433205 1.7792 AML other m 2021-12-24T03:54:59.94
IV.ESCV.HHN. ML:1.4 0.00012625935 1.0016 AML other m 2021-12-24T03:55:00.68
IV.SSY.HNE. ML:1.2 0.00006253082 0.2208 AML other m 2021-12-24T03:55:02.48
IV.HMDC.HHN. ML:1.2 0.00003511351 0.2208 AML other m 2021-12-24T03:55:02.78
IV.EMPL.HHE. ML:1.8 0.0003689402 1.3408 AML other m 2021-12-24T03:55:02.28
IV.EPOZ.HHN. ML:1.4 0.000094871945 1.4784 AML other m 2021-12-24T03:55:03.80
IV.HMDC.HNN. ML:1.8 0.00012837983 0.5888 AML other m 2021-12-24T03:55:03.70
IV.HVIT.HHN. ML:1.1 0.000023274885 0.2208 AML other m 2021-12-24T03:55:06.04
IV.HVIT.HHE. ML:1.0 0.000020830304500000002 0.24 AML other m 2021-12-24T03:55:08.44
IV.HMDC.HNE. ML:1.9 0.0001676318 1.1104 AML other m 2021-12-24T03:55:08.20
IV.ISPIC.EHE. ML:1.4 0.00003286259 0.4192 AML other m 2021-12-24T03:55:12.40
IV.ISPIC.HNN. ML:2.0 0.0001611912 0.8192 AML other m 2021-12-24T03:55:14.72
IV.ISPIC.HNE. ML:2.2 0.00025711859999999996 0.6112 AML other m 2021-12-24T03:55:21.40
IV.ISPIC.EHN. ML:1.6 0.000058780965 0.5376 AML other m 2021-12-24T03:55:26.63
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