Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 12-10-2021 and time 07:31:48 (UTC) 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.

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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
Zafferana Etnea CT 1 9517 9517
Santa Venerina CT 4 8592 18109
Milo CT 5 1087 19196
Trecastagni CT 8 10910 30106
Sant'Alfio CT 8 1582 31688
Viagrande CT 8 8563 40251
Pedara CT 8 14102 54353
Aci Sant'Antonio CT 9 17984 72337
Giarre CT 9 27659 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
San Giovanni la Punta CT 12 23060 245636
Valverde CT 12 7840 253476
Tremestieri Etneo CT 12 20589 274065
Mascalucia CT 13 31958 306023
San Gregorio di Catania CT 13 11966 317989
Sant'Agata li Battiati CT 14 9479 327468
San Pietro Clarenza CT 14 7743 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
Camporotondo Etneo CT 15 5023 420790
Fiumefreddo di Sicilia CT 15 9623 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
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 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: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

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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHE. 2021-10-12T07:31:58.05 0.3 undecidable manual P 334 44.3223 50 0.62 60
IV.NOV.HHZ. 2021-10-12T07:31:56.16 0.3 undecidable manual P 5 38.0286 50 -0.32 66
IV.EPIT.HHZ. 2021-10-12T07:31:55.70 0.6 undecidable manual S 345 14.3745 122 0.85 38
IV.EFIU.HHZ. 2021-10-12T07:31:55.50 0.3 undecidable manual S 40 15.0738 121 0.46 67
IV.EMPL.HHZ. 2021-10-12T07:31:54.00 0.3 undecidable manual S 266 11.3775 129 0.01 74
IV.EMSG.HHZ. 2021-10-12T07:31:53.51 0.3 undecidable manual P 319 19.9689 115 0.19 70
IV.ECTS.HHZ. 2021-10-12T07:31:53.17 0.1 undecidable manual P 5 21.867 113 -0.5 87
IV.ESLN.HHZ. 2021-10-12T07:31:53.88 0.3 undecidable manual S 274 10.9779 129 -0.01 74
IV.EMFS.HHE. 2021-10-12T07:31:53.58 0.1 undecidable manual S 293 9.6792 133 0.04 99
IV.ECHR.HHE. 2021-10-12T07:31:52.98 0.3 undecidable manual P 270 16.3725 119 0.29 69
IV.EPIT.HHZ. 2021-10-12T07:31:52.43 0.1 positive manual P 345 14.3745 122 0.08 97
IV.EMNR.HHZ. 2021-10-12T07:31:52.87 0.3 undecidable manual P 336 15.873 120 0.26 70
IV.ESVO.HHE. 2021-10-12T07:31:52.63 0.3 undecidable manual P 306 16.5723 119 -0.08 72
IV.EVRN.HHZ. 2021-10-12T07:31:52.30 0.1 undecidable manual S 83 3.1968 161 0.02 100
IV.EFIU.HHZ. 2021-10-12T07:31:52.33 0.1 undecidable manual P 40 15.0738 121 -0.13 96
IV.ESLN.HHZ. 2021-10-12T07:31:51.84 0.1 positive manual P 274 10.9779 129 0.04 98
IV.EMPL.HHZ. 2021-10-12T07:31:51.85 0.3 undecidable manual P 266 11.3775 129 0 74
IV.EPDN.HHZ. 2021-10-12T07:31:51.73 0.1 negative manual P 321 11.4774 128 -0.14 96
IV.EMFS.HHE. 2021-10-12T07:31:51.54 0.1 undecidable manual P 293 9.6792 133 -0.06 98
IV.ESPC.HHN. 2021-10-12T07:31:51.05 0.1 negative manual P 277 6.3936 145 -0.11 98
IV.EPOZ.HHZ. 2021-10-12T07:31:51.81 0.1 negative manual P 101 7.9809 139 0.46 91
IV.ECBD.HHN. 2021-10-12T07:31:51.41 0.1 positive manual P 354 10.4784 131 -0.31 93
IV.ECPN.HHZ. 2021-10-12T07:31:51.77 0.1 undecidable manual P 303 11.7771 128 -0.15 96
IV.EVRN.HHZ. 2021-10-12T07:31:50.76 0.1 negative manual P 83 3.1968 161 -0.1 98
IV.ESAL.HHZ. 2021-10-12T07:31:50.93 0.1 positive manual P 22 8.2806 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
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download