Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 02-05-2021 and time 14:07:30 (Italy) in region 4 km S Zafferana Etnea (CT)

A magnitude ML 2.3 earthquake occured in region: 4 km S Zafferana Etnea (CT), on

  • 02-05-2021 12:07:30 (UTC)
  • 02-05-2021 14:07:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6600, 15.1010 at 5 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 5 8563 37582
Pedara CT 6 14102 51684
Aci Sant'Antonio CT 6 17984 69668
Aci Bonaccorsi CT 7 3524 73192
Aci Catena CT 7 29851 103043
Milo CT 7 1087 104130
Acireale CT 8 52622 156752
Nicolosi CT 8 7463 164215
Valverde CT 9 7840 172055
San Giovanni la Punta CT 9 23060 195115
Tremestieri Etneo CT 10 20589 215704
Sant'Alfio CT 10 1582 217286
San Gregorio di Catania CT 10 11966 229252
Mascalucia CT 10 31958 261210
Giarre CT 11 27659 288869
Sant'Agata li Battiati CT 11 9479 298348
Gravina di Catania CT 11 25838 324186
San Pietro Clarenza CT 12 7743 331929
Aci Castello CT 12 18723 350652
Riposto CT 12 14838 365490
Camporotondo Etneo CT 13 5023 370513
Belpasso CT 13 28108 398621
Mascali CT 14 14282 412903
Ragalna CT 15 3924 416827
Misterbianco CT 17 49410 466237
Catania CT 17 314555 780792
Fiumefreddo di Sicilia CT 18 9623 790415
Piedimonte Etneo CT 18 3963 794378
Santa Maria di Licodia CT 19 7641 802019
Paternò CT 20 48228 850247
Motta Sant'Anastasia CT 20 12116 862363

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NW of Acireale (52622 inhabitants)
17 Km N of Catania (314555 inhabitants)
69 Km N of Siracusa (122291 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
72 Km SW of Messina (238439 inhabitants)
88 Km NE of Ragusa (73313 inhabitants)
93 Km NE of Vittoria (63339 inhabitants)
93 Km E of Caltanissetta (63360 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 2.3 2021-05-02
12:07:30		 37.6597 15.1013 5 2021-12-29
11:12:35		 Bollettino Sismico Italiano INGV 96316201
Reviewed
Rev200 		ML 2.0 2021-05-02
12:07:29		 37.674 15.092 1 2021-10-07
11:04:55		 Sala Operativa INGV_OE (Catania) 89712901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-02 12:07:30 ± 0.1
Latitude 37.6597 ± 0.0045
Longitude 15.1013 ± 0.0068
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96316201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 584
Semi-minor axis of confidence ellipse (meter) 259
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 114
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
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) 0.04047
Epicentral distance of station farthest from the epicenter (degree) 0.69967
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 96316201
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 11:04:45

ML:2.0

Field Value
Value 2.0
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 89712901
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-05-02 12:23:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-05-02T12:07:44.16 0.3 undecidable manual P 179 77.6667 50 -0.32 62
IV.HLNI.HHZ. 2021-05-02T12:07:44.63 0.6 undecidable manual S 210 40.0266 97 0.32 44
IV.SSY.HHZ. 2021-05-02T12:07:40.95 0.3 undecidable manual P 183 55.6998 50 -0.15 67
IV.AIO.HHZ. 2021-05-02T12:07:38.35 0.3 undecidable manual P 18 36.4413 98 0.66 61
IV.HLNI.HHZ. 2021-05-02T12:07:38.10 0.3 undecidable manual P 210 40.0266 97 -0.3 67
IV.HCRL.HHZ. 2021-05-02T12:07:38.87 0.3 undecidable manual P 188 42.2244 97 0.03 70
IV.EMCN.HHN. 2021-05-02T12:07:36.09 0.6 undecidable manual S 338 15.7731 108 0.02 49
IV.ECTS.HHZ. 2021-05-02T12:07:35.58 0.3 undecidable manual P 4 24.753 102 0.2 70
IV.ESML.HHZ. 2021-05-02T12:07:35.04 0.3 undecidable manual P 257 20.0688 104 0.57 64
IV.ESCV.HHZ. 2021-05-02T12:07:35.93 0.3 undecidable manual P 291 26.9508 101 0.12 71
IV.EMSG.HHZ. 2021-05-02T12:07:35.07 0.6 undecidable manual P 323 22.2555 103 0.17 47
IV.EFIU.HHZ. 2021-05-02T12:07:34.58 0.6 undecidable manual P 34 17.2716 106 0.64 42
IV.ENIC.HNZ. 2021-05-02T12:07:34.04 0.6 undecidable manual S 246 7.6812 124 0.52 45
IV.EPIT.HHZ. 2021-05-02T12:07:34.34 0.3 undecidable manual P 347 17.2716 106 0.41 68
IV.EPOZ.HHZ. 2021-05-02T12:07:34.42 0.6 undecidable manual S 80 7.7811 123 0.87 39
IV.EMNR.HHZ. 2021-05-02T12:07:34.35 0.3 undecidable manual P 339 18.6702 105 0.16 72
IV.ECBD.HHN. 2021-05-02T12:07:33.09 0.1 undecidable manual P 354 13.4754 111 -0.11 97
IV.ESPC.HHN. 2021-05-02T12:07:33.55 0.6 undecidable manual S 299 7.4814 124 0.1 49
IV.EMCN.HHN. 2021-05-02T12:07:33.36 0.1 undecidable manual P 338 15.7731 108 -0.28 93
IV.EPOZ.HHZ. 2021-05-02T12:07:32.17 0.1 positive manual P 80 7.7811 123 -0.01 100
IV.EVRN.HNZ. 2021-05-02T12:07:32.33 0.6 undecidable manual S 43 4.4955 139 -0.34 47
IV.ESAL.HHZ. 2021-05-02T12:07:32.70 0.1 negative manual P 15 10.9779 115 -0.05 99
IV.ENIC.HNZ. 2021-05-02T12:07:32.13 0.1 undecidable manual P 246 7.6812 124 -0.04 100
IV.EMFS.HHE. 2021-05-02T12:07:32.59 0.1 undecidable manual P 306 11.2776 114 -0.21 96
IV.EMPL.HHZ. 2021-05-02T12:07:32.79 0.1 positive manual P 281 11.6772 113 -0.09 98
IV.EMFO.HHE. 2021-05-02T12:07:31.91 0.1 undecidable manual P 353 8.4804 121 -0.4 92
IV.EVRN.HNZ. 2021-05-02T12:07:31.13 0.1 positive manual P 43 4.4955 139 -0.55 89
IV.ESPC.HHN. 2021-05-02T12:07:31.86 0.1 undecidable manual P 299 7.4814 124 -0.27 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESAL.HHN. ML:2.6 0.00692 1.24 AML other m 2021-05-02T12:07:39.89
IV.EMPL.HHN. ML:2.8 0.009859999999999999 0.42 AML other m 2021-05-02T12:07:40.04
IV.ESAL.HHE. ML:2.8 0.0099 0.28 AML other m 2021-05-02T12:07:41.56
IV.EMPL.HHE. ML:2.8 0.008235 1.24 AML other m 2021-05-02T12:07:41.06
IV.EFIU.HHN. ML:2.4 0.0023 0.84 AML other m 2021-05-02T12:07:42.54
IV.EPIT.HHE. ML:2.3 0.001955 0.42 AML other m 2021-05-02T12:07:43.26
IV.ECTS.HHE. ML:1.9 0.0005515 0.52 AML other m 2021-05-02T12:07:43.55
IV.EFIU.HHE. ML:2.4 0.0024050000000000005 0.52 AML other m 2021-05-02T12:07:44.80
IV.EMSG.HHE. ML:2.0 0.0008375 1.32 AML other m 2021-05-02T12:07:44.80
IV.ECTS.HHN. ML:1.8 0.0004465 0.96 AML other m 2021-05-02T12:07:44.47
IV.ESML.HHE. ML:2.4 0.001915 1.32 AML other m 2021-05-02T12:07:45.72
IV.ESML.HNE. ML:2.4 0.001865 1.32 AML other m 2021-05-02T12:07:45.73
IV.EPIT.HHN. ML:2.6 0.00349 1.32 AML other m 2021-05-02T12:07:45.74
IV.EMSG.HHN. ML:2.1 0.0008655000000000001 0.4 AML other m 2021-05-02T12:07:45.20
IV.ESML.HHN. ML:2.3 0.00178 0.78 AML other m 2021-05-02T12:07:45.22
IV.ESML.HNN. ML:2.3 0.001765 0.8 AML other m 2021-05-02T12:07:45.22
IV.HLNI.HHE. ML:1.7 0.000168 1.58 AML other m 2021-05-02T12:07:45.89
IV.HCRL.HHE. ML:2.3 0.000708 0.34 AML other m 2021-05-02T12:07:46.35
IV.AIO.HHE. ML:1.8 0.00026700000000000004 0.68 AML other m 2021-05-02T12:07:47.68
IV.AIO.HHN. ML:2.1 0.0005 0.92 AML other m 2021-05-02T12:07:48.51
IV.HCRL.HHN. ML:2.0 0.0003025 1.52 AML other m 2021-05-02T12:07:48.13
IV.HLNI.HHN. ML:1.7 0.000174 1.5 AML other m 2021-05-02T12:07:49.79
IV.SSY.HHE. ML:2.6 0.0009415 0.56 AML other m 2021-05-02T12:07:50.39
IV.ESCV.HHE. ML:2.0 0.0006035 1.22 AML other m 2021-05-02T12:07:50.38
IV.ESCV.HHN. ML:2.2 0.0009065 0.62 AML other m 2021-05-02T12:07:51.94
IV.SSY.HHN. ML:2.8 0.0014100000000000002 0.3 AML other m 2021-05-02T12:07:53.35
IV.HAVL.HHE. ML:2.4 0.0003725 0.92 AML other m 2021-05-02T12:07:57.25
IV.HAVL.HHN. ML:2.5 0.0004525 1.36 AML other m 2021-05-02T12:07:59.88
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