Earthquake with magnitude of ML 2.0 on date 12-10-2021 and time 09:31:48 (Italy) in region 1 km SW Zafferana Etnea (CT)

A magnitude ML 2.0 earthquake occured in region: 1 km SW Zafferana Etnea (CT), on

  • 12-10-2021 07:31:48 (UTC)
  • 12-10-2021 09:31:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6860, 15.1000 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
Zafferana Etnea CT 1 9517 9517
Santa Venerina CT 4 8592 18109
Milo CT 5 1087 19196
Sant'Alfio CT 8 1582 20778
Trecastagni CT 8 10910 31688
Pedara CT 8 14102 45790
Viagrande CT 8 8563 54353
Giarre CT 9 27659 82012
Aci Sant'Antonio CT 9 17984 99996
Aci Bonaccorsi CT 10 3524 103520
Aci Catena CT 10 29851 133371
Acireale CT 10 52622 185993
Nicolosi CT 10 7463 193456
Riposto CT 11 14838 208294
Mascali CT 12 14282 222576
Valverde CT 12 7840 230416
San Giovanni la Punta CT 12 23060 253476
Tremestieri Etneo CT 12 20589 274065
Mascalucia CT 13 31958 306023
San Gregorio di Catania CT 13 11966 317989
San Pietro Clarenza CT 14 7743 325732
Sant'Agata li Battiati CT 14 9479 335211
Gravina di Catania CT 14 25838 361049
Belpasso CT 15 28108 389157
Aci Castello CT 15 18723 407880
Ragalna CT 15 3924 411804
Piedimonte Etneo CT 15 3963 415767
Fiumefreddo di Sicilia CT 15 9623 425390
Camporotondo Etneo CT 15 5023 430413
Linguaglossa CT 18 5403 435816
Calatabiano CT 19 5308 441124
Misterbianco CT 20 49410 490534

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km NW of Acireale (52622 inhabitants)
20 Km N of Catania (314555 inhabitants)
67 Km SW of Reggio di Calabria (183035 inhabitants)
69 Km SW of Messina (238439 inhabitants)
72 Km N of Siracusa (122291 inhabitants)
91 Km NE of Ragusa (73313 inhabitants)
94 Km E of Caltanissetta (63360 inhabitants)
96 Km NE of Vittoria (63339 inhabitants)
97 Km N of Modica (54633 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 2.0 2021-10-12
07:31:48
37.6858 15.0997 9 2022-03-30
13:04:28
Bollettino Sismico Italiano INGV 99538631
Reviewed
Rev200
ML 1.4 2021-10-12
07:31:48
37.715 15.08 4 2022-02-07
16:01:24
Sala Operativa INGV_OE (Catania) 96465581
Reviewed
Rev100
ML 1.9 2021-10-12
07:31:48
37.6797 15.101 10 2021-10-12
07:39:23
Sala Sismica INGV-Roma 96465571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 07:31:48 ± 0.17
Latitude 37.6858 ± 0.0081
Longitude 15.0997 ± 0.0057
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 99538631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 866
Semi-minor axis of confidence ellipse (meter) 330
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 168
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.02878
Epicentral distance of station farthest from the epicenter (degree) 0.39930
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 99538631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-10 15:31:52

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 96465581
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-10-12 07:39:34

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96465571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 07:39:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MUCR.HHE. 2021-10-12T07:31:58.05 0.3 undecidable manual P 334 0.3993 50 0.62 60
IV.NOV.HHZ. 2021-10-12T07:31:56.16 0.3 undecidable manual P 5 0.3426 50 -0.32 66
IV.EPIT.HHZ. 2021-10-12T07:31:55.70 0.6 undecidable manual S 345 0.1295 122 0.85 38
IV.EFIU.HHZ. 2021-10-12T07:31:55.50 0.3 undecidable manual S 40 0.1358 121 0.46 67
IV.EMPL.HHZ. 2021-10-12T07:31:54.00 0.3 undecidable manual S 266 0.1025 129 0.01 74
IV.ECTS.HHZ. 2021-10-12T07:31:53.17 0.1 undecidable manual P 5 0.1970 113 -0.5 87
IV.ESLN.HHZ. 2021-10-12T07:31:53.88 0.3 undecidable manual S 274 0.0989 129 -0.01 74
IV.EMFS.HHE. 2021-10-12T07:31:53.58 0.1 undecidable manual S 293 0.0872 133 0.04 99
IV.EMSG.HHZ. 2021-10-12T07:31:53.51 0.3 undecidable manual P 319 0.1799 115 0.19 70
IV.ECHR.HHE. 2021-10-12T07:31:52.98 0.3 undecidable manual P 270 0.1475 119 0.29 69
IV.EMNR.HHZ. 2021-10-12T07:31:52.87 0.3 undecidable manual P 336 0.1430 120 0.26 70
IV.EPIT.HHZ. 2021-10-12T07:31:52.43 0.1 positive manual P 345 0.1295 122 0.08 97
IV.ESVO.HHE. 2021-10-12T07:31:52.63 0.3 undecidable manual P 306 0.1493 119 -0.08 72
IV.EVRN.HHZ. 2021-10-12T07:31:52.30 0.1 undecidable manual S 83 0.0288 161 0.02 100
IV.EFIU.HHZ. 2021-10-12T07:31:52.33 0.1 undecidable manual P 40 0.1358 121 -0.13 96
IV.EPDN.HHZ. 2021-10-12T07:31:51.73 0.1 negative manual P 321 0.1034 128 -0.14 96
IV.EMPL.HHZ. 2021-10-12T07:31:51.85 0.3 undecidable manual P 266 0.1025 129 0 74
IV.EMFS.HHE. 2021-10-12T07:31:51.54 0.1 undecidable manual P 293 0.0872 133 -0.06 98
IV.ESPC.HHN. 2021-10-12T07:31:51.05 0.1 negative manual P 277 0.0576 145 -0.11 98
IV.EPOZ.HHZ. 2021-10-12T07:31:51.81 0.1 negative manual P 101 0.0719 139 0.46 91
IV.ECBD.HHN. 2021-10-12T07:31:51.41 0.1 positive manual P 354 0.0944 131 -0.31 93
IV.ECPN.HHZ. 2021-10-12T07:31:51.77 0.1 undecidable manual P 303 0.1061 128 -0.15 96
IV.ESLN.HHZ. 2021-10-12T07:31:51.84 0.1 positive manual P 274 0.0989 129 0.04 98
IV.EVRN.HHZ. 2021-10-12T07:31:50.76 0.1 negative manual P 83 0.0288 161 -0.1 98
IV.ESAL.HHZ. 2021-10-12T07:31:50.93 0.1 positive manual P 22 0.0746 138 -0.47 90
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPIT.HHE. ML:0.0 0.0015884550000000001 0.5184 AML other m 2021-10-12T07:31:56.78
IV.EFIU.HHN. ML:0.0 0.0007216681 0.5376 AML other m 2021-10-12T07:31:56.12
IV.EFIU.HHE. ML:0.0 0.0005833675000000001 0.4224 AML other m 2021-10-12T07:31:56.27
IV.EMPL.HHN. ML:0.0 0.001515 0.22 AML other m 2021-10-12T07:31:57.52
IV.EPIT.HHN. ML:2.2 0.0017900000000000001 0.56 AML other m 2021-10-12T07:31:58.31
IV.EMPL.HHE. ML:0.0 0.0010435 0.38 AML other m 2021-10-12T07:32:00.28
IV.EMSG.HHE. ML:1.9 0.000662 0.52 AML other m 2021-10-12T07:32:02.01
IV.EMSG.HHN. ML:1.8 0.0004845 0.42 AML other m 2021-10-12T07:32:02.52
IV.EPZF.HHE. ML:1.6 0.000219 0.32 AML other m 2021-10-12T07:32:03.19
IV.EVRN.HNN. ML:0.0 0.012990110000000001 0.1664 AML other m 2021-10-12T07:31:54.24
IV.EVRN.HNE. ML:0.0 0.006774317 0.1472 AML other m 2021-10-12T07:31:54.24
IV.EVRN.HHE. ML:0.0 0.0107990515 0.16 AML other m 2021-10-12T07:31:54.24
IV.EVRN.HHN. ML:0.0 0.010333215500000001 0.3008 AML other m 2021-10-12T07:31:52.63
IV.ESAL.HHN. ML:0.0 0.001951995 0.2432 AML other m 2021-10-12T07:31:55.38
IV.EPOZ.HHN. ML:0.0 0.0016898955 0.2624 AML other m 2021-10-12T07:31:55.50
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