Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 31-07-2022 and time 10:51:59 (UTC) in region 2 km N Sant'Alfio (CT)

A magnitude ML 2.1 earthquake occured in region: 2 km N Sant'Alfio (CT), on

  • 31-07-2022 10:51:59 (UTC)
  • 31-07-2022 12:51:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7600, 15.1480 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.

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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
Sant'Alfio CT 2 1582 1582
Mascali CT 4 14282 15864
Giarre CT 5 27659 43523
Milo CT 5 1087 44610
Riposto CT 6 14838 59448
Piedimonte Etneo CT 6 3963 63411
Fiumefreddo di Sicilia CT 7 9623 73034
Santa Venerina CT 8 8592 81626
Zafferana Etnea CT 8 9517 91143
Linguaglossa CT 9 5403 96546
Calatabiano CT 10 5308 101854
Gaggi ME 13 3184 105038
Castiglione di Sicilia CT 14 3215 108253
Giardini-Naxos ME 15 9415 117668
Motta Camastra ME 15 845 118513
Taormina ME 16 10960 129473
Francavilla di Sicilia ME 16 3945 133418
Castelmola ME 16 1088 134506
Graniti ME 16 1492 135998
Acireale CT 16 52622 188620
Trecastagni CT 17 10910 199530
Aci Sant'Antonio CT 17 17984 217514
Viagrande CT 17 8563 226077
Aci Catena CT 17 29851 255928
Pedara CT 18 14102 270030
Moio Alcantara ME 18 717 270747
Aci Bonaccorsi CT 18 3524 274271
Nicolosi CT 19 7463 281734
Letojanni ME 19 2861 284595
Malvagna ME 20 733 285328
Mongiuffi Melia ME 20 600 285928
Valverde CT 20 7840 293768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km N of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
58 Km SW of Reggio di Calabria (183035 inhabitants)
60 Km SW of Messina (238439 inhabitants)
79 Km N of Siracusa (122291 inhabitants)
100 Km NE of Ragusa (73313 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 2.1 2022-07-31
10:51:59		 37.7595 15.1482 10 2023-01-31
19:03:35		 Bollettino Sismico Italiano INGV 108974871
Reviewed
Rev200 		ML 2.0 2022-07-31
10:51:58		 37.763 15.132 9 2022-08-27
02:08:31		 Sala Operativa INGV_OE (Catania) 107914421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-07-31 10:51:59 ± 0.08
Latitude 37.7595 ± 0.0045
Longitude 15.1482 ± 0.0057
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 108974871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 543
Semi-minor axis of confidence ellipse (meter) 399
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 140
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.01169
Epicentral distance of station farthest from the epicenter (degree) 0.60434
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 29
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 108974871
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-08-27 02:05:01

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 107914421
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2022-07-31 11:08:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2022-07-31T10:52:11.54 0.3 undecidable manual P 186 67.0773 50 0.44 62
IV.MTTG.HHZ. 2022-07-31T10:52:09.43 0.6 undecidable manual P 61 55.4001 50 0.14 45
IV.HLNI.HHZ. 2022-07-31T10:52:08.51 0.6 undecidable manual P 208 51.6039 50 -0.2 45
IV.AIO.HHZ. 2022-07-31T10:52:08.29 0.6 undecidable manual S 18 24.6531 112 -0.12 48
IV.MUCR.HHZ. 2022-07-31T10:52:07.18 0.3 undecidable manual P 323 39.5271 50 0.32 67
IV.LIBRI.HHZ. 2022-07-31T10:52:07.27 0.3 undecidable manual P 332 40.7259 50 0.23 68
IV.ECTS.HHN. 2022-07-31T10:52:05.20 0.6 undecidable manual S 350 13.7751 126 0.11 49
IV.EMFS.HHE. 2022-07-31T10:52:05.57 0.6 undecidable manual S 251 13.875 126 0.45 45
IV.ESCV.HHE. 2022-07-31T10:52:05.75 0.3 undecidable manual P 267 29.2485 50 0.49 65
1J.FX09.HHE. 2022-07-31T10:52:05.51 0.6 undecidable manual S 57 12.3765 129 0.81 39
IV.NOV.HHZ. 2022-07-31T10:52:05.19 0.3 undecidable manual P 358 29.748 50 -0.16 70
IV.EPDN.HHZ. 2022-07-31T10:52:05.38 0.6 undecidable manual S 274 11.5773 131 0.91 38
IV.EMNR.HHZ. 2022-07-31T10:52:05.36 0.6 undecidable manual S 301 12.4764 129 0.64 42
IV.EPIT.HHZ. 2022-07-31T10:52:04.56 0.6 undecidable manual S 306 9.879 135 0.51 45
IV.EPZF.HHN. 2022-07-31T10:52:04.81 0.3 undecidable manual P 286 26.4513 50 -0.03 72
IV.ESPC.HHN. 2022-07-31T10:52:04.89 0.6 undecidable manual S 235 12.9759 128 0.04 49
IV.EMCN.HHN. 2022-07-31T10:52:04.57 0.6 undecidable manual S 289 10.6782 133 0.33 47
1J.FX08.HHZ. 2022-07-31T10:52:04.16 0.6 undecidable manual S 120 5.2947 152 1.06 36
IV.AIO.HHZ. 2022-07-31T10:52:04.34 0.3 undecidable manual P 18 24.6531 112 -0.17 71
IV.ECBD.HHN. 2022-07-31T10:52:03.21 0.6 undecidable manual S 293 5.8941 149 0.02 50
IV.EMFO.HHE. 2022-07-31T10:52:03.04 0.6 undecidable manual S 243 5.6943 150 -0.13 49
IV.EMSG.HHZ. 2022-07-31T10:52:03.65 0.3 undecidable manual P 291 18.6702 118 0.22 71
IV.EPMN.HHN. 2022-07-31T10:52:03.14 0.6 undecidable manual S 21 7.1928 144 -0.31 47
IV.EFIU.HHE. 2022-07-31T10:52:03.85 0.6 undecidable manual S 58 6.3936 147 0.56 44
IV.EVRN.HHZ. 2022-07-31T10:52:03.97 0.6 undecidable manual S 188 7.881 142 0.38 46
IV.ESAL.HHZ. 2022-07-31T10:52:02.54 0.6 undecidable manual S 248 1.2987 173 -0.13 49
IV.EPDN.HHZ. 2022-07-31T10:52:02.24 0.1 undecidable manual P 274 11.5773 131 0 100
IV.EMNR.HHZ. 2022-07-31T10:52:02.43 0.1 undecidable manual P 301 12.4764 129 0.05 99
IV.ECNE.HHN. 2022-07-31T10:52:02.55 0.3 undecidable manual P 273 12.876 128 0.11 73
IV.ECTS.HHN. 2022-07-31T10:52:02.16 0.1 undecidable manual P 350 13.7751 126 -0.44 91
IV.EMFS.HHE. 2022-07-31T10:52:02.36 0.3 undecidable manual P 251 13.875 126 -0.25 71
IV.EMPL.HHN. 2022-07-31T10:52:02.78 0.3 undecidable manual P 240 17.9709 119 -0.52 66
IV.ESPC.HHN. 2022-07-31T10:52:02.05 0.1 undecidable manual P 235 12.9759 128 -0.41 91
IV.EPOZ.HHZ. 2022-07-31T10:52:02.40 0.1 positive manual P 160 10.3785 134 0.34 93
IV.EMCN.HHN. 2022-07-31T10:52:02.08 0.1 undecidable manual P 289 10.6782 133 -0.03 99
IV.ESLN.HHZ. 2022-07-31T10:52:02.58 0.1 undecidable manual P 244 16.872 120 -0.54 88
1J.FX09.HHE. 2022-07-31T10:52:02.28 0.1 undecidable manual P 57 12.3765 129 -0.09 98
IV.EFIU.HHE. 2022-07-31T10:52:01.39 0.1 negative manual P 58 6.3936 147 -0.17 97
1J.FX08.HHZ. 2022-07-31T10:52:01.49 0.1 undecidable manual P 120 5.2947 152 0.04 100
IV.EVRN.HHZ. 2022-07-31T10:52:01.64 0.1 positive manual P 188 7.881 142 -0.09 99
IV.ECBD.HHN. 2022-07-31T10:52:01.19 0.1 undecidable manual P 293 5.8941 149 -0.31 94
IV.EMFO.HHE. 2022-07-31T10:52:01.14 0.1 undecidable manual P 243 5.6943 150 -0.35 94
IV.EPIT.HHZ. 2022-07-31T10:52:01.98 0.1 positive manual P 306 9.879 135 -0.01 100
IV.EPMN.HHN. 2022-07-31T10:52:01.25 0.1 undecidable manual P 21 7.1928 144 -0.4 92
IV.ESAL.HHZ. 2022-07-31T10:52:00.79 0.3 undecidable manual P 248 1.2987 173 -0.41 70
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPMN.HHN. ML:2.4 0.004295 0.18 AML other m 2022-07-31T10:52:03.32
IV.EPMN.HHE. ML:2.6 0.00558 1.18 AML other m 2022-07-31T10:52:03.99
IV.EFIU.HHE. ML:1.9 0.0013295 0.56 AML other m 2022-07-31T10:52:04.16
IV.EVRN.HNE. ML:2.7 0.007135 0.9 AML other m 2022-07-31T10:52:04.40
IV.EFIU.HHN. ML:2.0 0.0014449999999999999 0.58 AML other m 2022-07-31T10:52:04.81
IV.ECTS.HHN. ML:1.9 0.0007575 1.12 AML other m 2022-07-31T10:52:06.96
IV.ECTS.HHE. ML:2.0 0.00118 1.18 AML other m 2022-07-31T10:52:06.69
IV.EPOZ.HNN. ML:2.2 0.00226 0.96 AML other m 2022-07-31T10:52:07.09
IV.EPOZ.HHN. ML:2.2 0.0022299999999999998 0.94 AML other m 2022-07-31T10:52:07.09
IV.EVRN.HHE. ML:2.7 0.008455 0.54 AML other m 2022-07-31T10:52:07.42
IV.EPOZ.HHE. ML:2.1 0.0017549999999999998 0.3 AML other m 2022-07-31T10:52:07.37
IV.EPOZ.HNE. ML:2.2 0.0019399999999999999 0.3 AML other m 2022-07-31T10:52:07.38
IV.EVRN.HNN. ML:2.7 0.0083 0.48 AML other m 2022-07-31T10:52:07.42
IV.EVRN.HHN. ML:2.7 0.007055 0.2 AML other m 2022-07-31T10:52:07.43
IV.AIO.HHE. ML:1.9 0.0004965000000000001 1.08 AML other m 2022-07-31T10:52:11.59
IV.AIO.HHN. ML:1.9 0.00046550000000000004 0.46 AML other m 2022-07-31T10:52:11.44
IV.EPZF.HHN. ML:2.2 0.000812 0.34 AML other m 2022-07-31T10:52:11.33
IV.EMSG.HHE. ML:2.5 0.002385 0.72 AML other m 2022-07-31T10:52:11.94
IV.NOV.HHE. ML:2.0 0.0005675 0.38 AML other m 2022-07-31T10:52:12.21
IV.NOV.HHN. ML:1.9 0.000358 0.98 AML other m 2022-07-31T10:52:12.72
IV.ESCV.HHE. ML:2.0 0.000561 0.66 AML other m 2022-07-31T10:52:14.64
IV.ESCV.HHN. ML:2.2 0.0007785 1.78 AML other m 2022-07-31T10:52:14.04
IV.EMSG.HHN. ML:2.3 0.0017250000000000002 1.42 AML other m 2022-07-31T10:52:15.89
IV.LIBRI.HHE. ML:1.4 0.00007939999999999999 1.26 AML other m 2022-07-31T10:52:15.24
IV.EPZF.HHE. ML:2.2 0.0008795 0.4 AML other m 2022-07-31T10:52:15.67
1J.FX11.HHN. ML:1.8 0.0001625 0.86 AML other m 2022-07-31T10:52:16.59
1J.FX11.HHE. ML:1.7 0.000149 0.42 AML other m 2022-07-31T10:52:17.03
IV.MUCR.HHE. ML:1.7 0.000167 1.3 AML other m 2022-07-31T10:52:20.25
IV.MUCR.HHN. ML:1.8 0.000215 0.54 AML other m 2022-07-31T10:52:21.71
IV.LIBRI.HHN. ML:1.4 0.0000807 0.86 AML other m 2022-07-31T10:52:23.56
IV.SSY.HHN. ML:2.4 0.00047599999999999997 1.08 AML other m 2022-07-31T10:52:24.94
IV.SSY.HHE. ML:2.3 0.000373 1.2 AML other m 2022-07-31T10:52:25.26
IV.SSY.HNE. ML:1.9 0.000155 0.5 AML other m 2022-07-31T10:52:25.26
IV.SSY.HNN. ML:1.9 0.0001565 1.42 AML other m 2022-07-31T10:52:26.02
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
Waveforms Seismic signals in miniseed + resp format Download