Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 02-05-2021 and time 11:26:07 (Italy) in region 4 km S Zafferana Etnea (CT)

A magnitude ML 2.1 earthquake occured in region: 4 km S Zafferana Etnea (CT), on

  • 02-05-2021 09:26:07 (UTC)
  • 02-05-2021 11:26:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6630, 15.0990 at 3 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 4 9517 9517
Santa Venerina CT 5 8592 18109
Trecastagni CT 5 10910 29019
Viagrande CT 6 8563 37582
Pedara CT 6 14102 51684
Aci Sant'Antonio CT 7 17984 69668
Milo CT 7 1087 70755
Aci Bonaccorsi CT 7 3524 74279
Aci Catena CT 8 29851 104130
Acireale CT 8 52622 156752
Nicolosi CT 8 7463 164215
San Giovanni la Punta CT 9 23060 187275
Valverde CT 10 7840 195115
Tremestieri Etneo CT 10 20589 215704
Sant'Alfio CT 10 1582 217286
Mascalucia CT 11 31958 249244
Giarre CT 11 27659 276903
San Gregorio di Catania CT 11 11966 288869
Sant'Agata li Battiati CT 12 9479 298348
Gravina di Catania CT 12 25838 324186
San Pietro Clarenza CT 12 7743 331929
Riposto CT 12 14838 346767
Aci Castello CT 13 18723 365490
Belpasso CT 13 28108 393598
Camporotondo Etneo CT 13 5023 398621
Mascali CT 14 14282 412903
Ragalna CT 14 3924 416827
Fiumefreddo di Sicilia CT 18 9623 426450
Misterbianco CT 18 49410 475860
Catania CT 18 314555 790415
Piedimonte Etneo CT 18 3963 794378
Santa Maria di Licodia CT 19 7641 802019
Paternò CT 20 48228 850247

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NW of Acireale (52622 inhabitants)
18 Km N of Catania (314555 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
69 Km N of Siracusa (122291 inhabitants)
72 Km SW of Messina (238439 inhabitants)
88 Km NE of Ragusa (73313 inhabitants)
93 Km E of Caltanissetta (63360 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
94 Km NE of Modica (54633 inhabitants)
100 Km NE of Gela (75827 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 2021-05-02
09:26:07		 37.6628 15.0987 3 2021-12-29
11:12:35		 Bollettino Sismico Italiano INGV 96315991
Reviewed
Rev200 		ML 1.9 2021-05-02
09:26:06		 37.667 15.094 3 2021-10-07
10:59:41		 Sala Operativa INGV_OE (Catania) 89702481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-02 09:26:07 ± 0.14
Latitude 37.6628 ± 0.0045
Longitude 15.0987 ± 0.0057
Depth (km) 3 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96315991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 94
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 304
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.38311
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 96315991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 10:59:27

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 89702481
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-05-02 09:36:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HCRL.HHZ. 2021-05-02T09:26:22.91 0.6 undecidable manual S 188 42.5241 94 0.55 42
IV.HCRL.HHZ. 2021-05-02T09:26:15.87 0.3 undecidable manual P 188 42.5241 94 -0.24 68
IV.HLNI.HHZ. 2021-05-02T09:26:15.19 0.3 undecidable manual P 210 40.1265 94 -0.45 65
IV.AIO.HHZ. 2021-05-02T09:26:15.35 0.3 undecidable manual P 19 36.2415 95 0.5 65
IV.EMCN.HHN. 2021-05-02T09:26:13.09 0.6 undecidable manual S 338 15.3735 101 0.09 49
IV.ECTS.HHZ. 2021-05-02T09:26:12.65 0.3 undecidable manual P 5 24.3534 97 0.15 72
IV.ECBD.HHN. 2021-05-02T09:26:12.65 0.6 undecidable manual S 355 13.0758 103 0.42 46
IV.ESML.HHZ. 2021-05-02T09:26:12.08 0.3 undecidable manual P 256 19.869 99 0.48 67
IV.EFIU.HHE. 2021-05-02T09:26:11.52 0.3 undecidable manual P 35 17.1717 100 0.46 68
IV.EPOZ.HHZ. 2021-05-02T09:26:11.39 0.6 undecidable manual S 83 7.9809 111 0.87 39
IV.EPIT.HHZ. 2021-05-02T09:26:11.47 0.3 undecidable manual P 347 16.872 100 0.46 68
IV.ENIC.HHZ. 2021-05-02T09:26:11.10 0.6 undecidable manual S 243 7.5813 111 0.69 42
IV.EMFS.HHE. 2021-05-02T09:26:11.49 0.6 undecidable manual S 306 10.878 105 0.01 50
IV.EMSG.HHZ. 2021-05-02T09:26:11.96 0.3 undecidable manual P 323 21.867 98 -0.03 74
IV.EMNR.HHZ. 2021-05-02T09:26:11.41 0.3 undecidable manual P 340 18.2706 99 0.13 73
IV.EMCN.HHN. 2021-05-02T09:26:10.39 0.1 undecidable manual P 338 15.3735 101 -0.32 94
IV.ESPC.HHN. 2021-05-02T09:26:10.61 0.6 undecidable manual S 298 7.0929 113 0.37 47
IV.ECBD.HHN. 2021-05-02T09:26:10.06 0.1 undecidable manual P 355 13.0758 103 -0.2 96
IV.ECNE.HHN. 2021-05-02T09:26:10.38 0.3 undecidable manual P 323 14.1747 102 -0.1 74
IV.EMFO.HHE. 2021-05-02T09:26:10.72 0.6 undecidable manual S 355 8.0808 110 0.14 49
IV.EVRN.HNZ. 2021-05-02T09:26:09.30 0.6 undecidable manual S 48 4.3956 124 -0.11 50
IV.ESAL.HHZ. 2021-05-02T09:26:09.69 0.1 negative manual P 17 10.6782 106 -0.11 98
IV.EPOZ.HHZ. 2021-05-02T09:26:09.10 0.1 undecidable manual P 83 7.9809 111 -0.18 98
IV.EMPL.HHZ. 2021-05-02T09:26:09.80 0.1 positive manual P 279 11.3775 105 -0.14 98
IV.ENIC.HHZ. 2021-05-02T09:26:09.15 0.1 positive manual P 243 7.5813 111 -0.06 100
IV.EMFS.HHE. 2021-05-02T09:26:09.60 0.1 undecidable manual P 306 10.878 105 -0.23 96
IV.EMFO.HHE. 2021-05-02T09:26:08.95 0.1 undecidable manual P 355 8.0808 110 -0.36 94
IV.EVRN.HNZ. 2021-05-02T09:26:08.10 0.1 positive manual P 48 4.3956 124 -0.54 90
IV.ESPC.HHN. 2021-05-02T09:26:08.87 0.1 undecidable manual P 298 7.0929 113 -0.24 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESAL.HHN. ML:2.5 0.005849999999999999 1.24 AML other m 2021-05-02T09:26:16.88
IV.ECTS.HHN. ML:1.7 0.00035 1.1 AML other m 2021-05-02T09:26:17.57
IV.EMPL.HHN. ML:2.6 0.00745 0.3 AML other m 2021-05-02T09:26:17.05
IV.ESAL.HHE. ML:2.5 0.00586 0.38 AML other m 2021-05-02T09:26:17.04
IV.EMPL.HHE. ML:2.6 0.007279999999999999 1.7 AML other m 2021-05-02T09:26:19.03
IV.EPIT.HHE. ML:2.2 0.0014849999999999998 1.38 AML other m 2021-05-02T09:26:20.24
IV.ECTS.HHE. ML:1.8 0.00040449999999999997 0.5 AML other m 2021-05-02T09:26:20.53
IV.EPIT.HHN. ML:2.4 0.00269 0.3 AML other m 2021-05-02T09:26:21.72
IV.ESML.HHE. ML:2.2 0.0012035 1.32 AML other m 2021-05-02T09:26:22.74
IV.ESML.HNE. ML:2.1 0.0011949999999999999 1.32 AML other m 2021-05-02T09:26:22.75
IV.HLNI.HHN. ML:1.5 0.0001185 0.96 AML other m 2021-05-02T09:26:22.85
IV.EMSG.HHN. ML:1.9 0.0006805000000000001 0.36 AML other m 2021-05-02T09:26:22.38
IV.ESML.HHN. ML:2.2 0.001325 0.68 AML other m 2021-05-02T09:26:22.26
IV.ESML.HNN. ML:2.1 0.0011835 0.7 AML other m 2021-05-02T09:26:22.27
IV.HLNI.HHE. ML:1.6 0.0001305 1.5 AML other m 2021-05-02T09:26:22.87
IV.EMSG.HHE. ML:1.8 0.000532 0.9 AML other m 2021-05-02T09:26:22.46
IV.HCRL.HHE. ML:2.2 0.00047599999999999997 0.86 AML other m 2021-05-02T09:26:23.32
IV.AIO.HHE. ML:1.6 0.0001795 0.72 AML other m 2021-05-02T09:26:24.67
IV.AIO.HHN. ML:1.9 0.00034050000000000004 0.4 AML other m 2021-05-02T09:26:25.50
IV.HCRL.HHN. ML:1.8 0.00020899999999999998 0.2 AML other m 2021-05-02T09:26:27.26
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