Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 30-04-2021 and time 23:28:47 (Italy) in region 2 km W Giarre (CT)

A magnitude ML 2.0 earthquake occured in region: 2 km W Giarre (CT), on

  • 30-04-2021 21:28:47 (UTC)
  • 30-04-2021 23:28:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7260, 15.1660 at 19 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
Giarre CT 2 27659 27659
Sant'Alfio CT 3 1582 29241
Riposto CT 4 14838 44079
Milo CT 4 1087 45166
Mascali CT 5 14282 59448
Santa Venerina CT 5 8592 68040
Zafferana Etnea CT 6 9517 77557
Fiumefreddo di Sicilia CT 8 9623 87180
Piedimonte Etneo CT 9 3963 91143
Calatabiano CT 12 5308 96451
Acireale CT 13 52622 149073
Linguaglossa CT 13 5403 154476
Aci Sant'Antonio CT 14 17984 172460
Aci Catena CT 14 29851 202311
Viagrande CT 14 8563 210874
Trecastagni CT 14 10910 221784
Aci Bonaccorsi CT 15 3524 225308
Pedara CT 15 14102 239410
Gaggi ME 16 3184 242594
Giardini-Naxos ME 16 9415 252009
Valverde CT 17 7840 259849
Nicolosi CT 17 7463 267312
Taormina ME 17 10960 278272
San Giovanni la Punta CT 18 23060 301332
Castelmola ME 18 1088 302420
Castiglione di Sicilia CT 18 3215 305635
Tremestieri Etneo CT 19 20589 326224
San Gregorio di Catania CT 19 11966 338190
Aci Castello CT 19 18723 356913
Motta Camastra ME 19 845 357758
Graniti ME 19 1492 359250
Mascalucia CT 20 31958 391208
Francavilla di Sicilia ME 20 3945 395153
Sant'Agata li Battiati CT 20 9479 404632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km N of Acireale (52622 inhabitants)
26 Km N of Catania (314555 inhabitants)
60 Km SW of Reggio di Calabria (183035 inhabitants)
62 Km SW of Messina (238439 inhabitants)
75 Km N of Siracusa (122291 inhabitants)
97 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 2.0 2021-04-30
21:28:47		 37.7262 15.166 19 2021-07-12
16:55:13		 Bollettino Sismico Italiano INGV 90657501
Reviewed
Rev200 		ML 1.8 2021-04-30
21:28:47		 37.723 15.161 18 2021-06-30
13:50:24		 Sala Operativa INGV_OE (Catania) 89642091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-30 21:28:47 ± 0.19
Latitude 37.7262 ± 0.0072
Longitude 15.1660 ± 0.0171
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90657501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1292
Semi-minor axis of confidence ellipse (meter) 692
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 280
Circular confidence region, given by single value of horizontal uncertainty (meter) 1290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.03777
Epicentral distance of station farthest from the epicenter (degree) 0.76712
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 28
Type of magnitude ML
Reference to an origin 90657501
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-30 13:50:13

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 89642091
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-04-30 21:38:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-04-30T21:29:14.09 0.6 undecidable manual S 183 85.1481 97 0.87 35
IV.HAVL.HHZ. 2021-04-30T21:29:02.17 0.3 undecidable manual P 183 85.1481 97 -0.35 62
IV.IVPL.HHZ. 2021-04-30T21:29:01.67 0.3 undecidable manual P 347 73.9704 98 0.86 51
IV.SSY.HHZ. 2021-04-30T21:28:59.73 0.6 undecidable manual P 187 63.5919 99 0.49 42
IV.HCRL.HHZ. 2021-04-30T21:28:56.99 0.3 undecidable manual P 193 50.5161 102 -0.27 68
IV.EPOZ.HHZ. 2021-04-30T21:28:55.25 0.6 undecidable manual S 162 6.2937 159 0.96 39
IV.ENIC.HHZ. 2021-04-30T21:28:55.60 0.3 undecidable manual S 230 16.4724 133 -0.22 72
IV.ECBD.HHN. 2021-04-30T21:28:55.20 0.6 undecidable manual S 311 9.1797 151 0.59 45
IV.EPIT.HHZ. 2021-04-30T21:28:55.53 0.6 undecidable manual S 315 13.4754 140 0.26 48
IV.EMFO.HHE. 2021-04-30T21:28:54.11 0.6 undecidable manual S 279 6.6933 158 -0.22 49
IV.ESAL.HHZ. 2021-04-30T21:28:54.29 0.6 undecidable manual S 319 4.1958 166 0.17 50
IV.EVRN.HHZ. 2021-04-30T21:28:54.16 0.6 undecidable manual S 213 4.8951 164 -0.01 51
IV.EFIU.HHZ. 2021-04-30T21:28:54.46 0.6 undecidable manual S 29 8.0808 154 -0.01 51
IV.AIO.HHZ. 2021-04-30T21:28:53.71 0.1 undecidable manual P 12 27.8499 116 -0.22 96
IV.ENIC.HHZ. 2021-04-30T21:28:52.75 0.3 undecidable manual P 230 16.4724 133 0.27 72
IV.EPIT.HHZ. 2021-04-30T21:28:52.23 0.1 negative manual P 315 13.4754 140 0.07 100
IV.EMCN.HHN. 2021-04-30T21:28:52.06 0.3 undecidable manual P 302 13.6752 139 -0.12 75
IV.EVRN.HHZ. 2021-04-30T21:28:51.26 0.3 undecidable manual P 213 4.8951 164 -0.27 73
IV.EFIU.HHZ. 2021-04-30T21:28:51.34 0.3 undecidable manual P 29 8.0808 154 -0.36 72
IV.EPOZ.HHZ. 2021-04-30T21:28:51.60 0.3 undecidable manual P 162 6.2937 159 0.01 77
IV.ECBD.HHN. 2021-04-30T21:28:51.48 0.3 undecidable manual P 311 9.1797 151 -0.31 72
IV.EMFO.HHE. 2021-04-30T21:28:51.30 0.1 undecidable manual P 279 6.6933 158 -0.32 96
IV.ESAL.HHZ. 2021-04-30T21:28:51.34 0.3 undecidable manual P 319 4.1958 166 -0.15 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EVRN.HNN. ML:2.4 0.0019700000000000004 0.3 AML other m 2021-04-30T21:28:54.57
IV.EVRN.HNE. ML:2.4 0.002175 0.34 AML other m 2021-04-30T21:28:54.59
IV.EVRN.HHE. ML:2.5 0.002745 0.34 AML other m 2021-04-30T21:28:54.59
IV.ESAL.HHE. ML:2.2 0.0013555 0.34 AML other m 2021-04-30T21:28:54.66
IV.ESAL.HHN. ML:2.0 0.0008005 0.94 AML other m 2021-04-30T21:28:54.44
IV.EFIU.HHE. ML:1.8 0.000491 1.12 AML other m 2021-04-30T21:28:54.98
IV.EFIU.HHN. ML:1.9 0.0006695 1.6 AML other m 2021-04-30T21:28:55.11
IV.ECTS.HHE. ML:2.4 0.00151 0.32 AML other m 2021-04-30T21:28:56.38
IV.ECTS.HHN. ML:2.1 0.0008029999999999999 0.98 AML other m 2021-04-30T21:28:56.35
IV.EMPL.HHN. ML:2.0 0.000675 0.32 AML other m 2021-04-30T21:28:57.62
IV.EPIT.HHN. ML:2.3 0.00133 0.34 AML other m 2021-04-30T21:28:57.79
IV.EPIT.HHE. ML:2.1 0.0009715 1.68 AML other m 2021-04-30T21:28:58.15
IV.EVRN.HHN. ML:2.2 0.00121 1.76 AML other m 2021-04-30T21:28:59.88
IV.AIO.HHE. ML:1.6 0.0001735 0.88 AML other m 2021-04-30T21:28:59.88
IV.AIO.HHN. ML:1.5 0.00014250000000000002 0.98 AML other m 2021-04-30T21:28:59.41
IV.ENIC.HHE. ML:1.9 0.0005235 0.34 AML other m 2021-04-30T21:29:01.41
IV.ESCV.HHE. ML:1.6 0.00016749999999999998 1.2 AML other m 2021-04-30T21:29:01.76
IV.EMPL.HHE. ML:2.0 0.0005600000000000001 0.42 AML other m 2021-04-30T21:29:02.37
IV.ENIC.HHN. ML:1.9 0.0005815 0.42 AML other m 2021-04-30T21:29:02.44
IV.ESCV.HHN. ML:1.7 0.0001955 0.26 AML other m 2021-04-30T21:29:04.37
IV.HCRL.HHE. ML:1.4 0.000063 0.52 AML other m 2021-04-30T21:29:04.60
IV.HCRL.HHN. ML:1.4 0.000053 1 AML other m 2021-04-30T21:29:06.47
IV.SSY.HHE. ML:2.0 0.00017449999999999999 1.1 AML other m 2021-04-30T21:29:12.74
IV.SSY.HHN. ML:2.2 0.00031 0.44 AML other m 2021-04-30T21:29:12.65
IV.HAVL.HHN. ML:2.0 0.0001135 0.9 AML other m 2021-04-30T21:29:14.42
IV.IVPL.HHN. ML:1.9 0.0001315 0.64 AML other m 2021-04-30T21:29:14.45
IV.HAVL.HHE. ML:2.0 0.00013700000000000002 0.36 AML other m 2021-04-30T21:29:15.47
IV.IVPL.HHE. ML:1.9 0.0001255 0.48 AML other m 2021-04-30T21:29:17.67
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