Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 30-04-2021 and time 10:00:24 (Italy) in region 2 km NE Santa Venerina (CT)

A magnitude ML 1.5 earthquake occured in region: 2 km NE Santa Venerina (CT), on

  • 30-04-2021 08:00:24 (UTC)
  • 30-04-2021 10:00:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6960, 15.1560 at 21 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
Santa Venerina CT 2 8592 8592
Zafferana Etnea CT 5 9517 18109
Milo CT 5 1087 19196
Giarre CT 5 27659 46855
Sant'Alfio CT 6 1582 48437
Riposto CT 6 14838 63275
Mascali CT 8 14282 77557
Acireale CT 9 52622 130179
Aci Sant'Antonio CT 10 17984 148163
Aci Catena CT 10 29851 178014
Viagrande CT 11 8563 186577
Trecastagni CT 11 10910 197487
Aci Bonaccorsi CT 12 3524 201011
Fiumefreddo di Sicilia CT 12 9623 210634
Pedara CT 12 14102 224736
Piedimonte Etneo CT 13 3963 228699
Valverde CT 13 7840 236539
San Giovanni la Punta CT 14 23060 259599
Nicolosi CT 14 7463 267062
San Gregorio di Catania CT 15 11966 279028
Tremestieri Etneo CT 15 20589 299617
Aci Castello CT 16 18723 318340
Calatabiano CT 16 5308 323648
Linguaglossa CT 16 5403 329051
Mascalucia CT 16 31958 361009
Sant'Agata li Battiati CT 17 9479 370488
Gravina di Catania CT 17 25838 396326
San Pietro Clarenza CT 18 7743 404069
Gaggi ME 19 3184 407253
Camporotondo Etneo CT 19 5023 412276
Giardini-Naxos ME 19 9415 421691
Belpasso CT 20 28108 449799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km N of Acireale (52622 inhabitants)
22 Km N of Catania (314555 inhabitants)
63 Km SW of Reggio di Calabria (183035 inhabitants)
66 Km SW of Messina (238439 inhabitants)
72 Km N of Siracusa (122291 inhabitants)
94 Km NE of Ragusa (73313 inhabitants)
99 Km E of Caltanissetta (63360 inhabitants)
99 Km NE of Vittoria (63339 inhabitants)
99 Km NE 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 1.5 2021-04-30
08:00:24		 37.6957 15.1563 21 2021-07-12
16:55:10		 Bollettino Sismico Italiano INGV 90017041
Reviewed
Rev200 		ML 1.3 2021-04-30
08:00:24		 37.695 15.153 16 2021-06-30
10:13:51		 Sala Operativa INGV_OE (Catania) 89624601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-30 08:00:24 ± 0.18
Latitude 37.6957 ± 0.0090
Longitude 15.1563 ± 0.0125
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90017041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1212
Semi-minor axis of confidence ellipse (meter) 653
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 301
Circular confidence region, given by single value of horizontal uncertainty (meter) 1210.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
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) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.01799
Epicentral distance of station farthest from the epicenter (degree) 0.28239
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 90017041
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-30 10:13:32

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 89624601
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-04-30 08:24:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AIO.HHZ. 2021-04-30T08:00:36.31 0.6 undecidable manual S 12 31.3464 116 0.05 48
IV.EPIT.HHZ. 2021-04-30T08:00:33.21 0.6 undecidable manual S 326 15.5733 139 0.34 47
IV.ECTS.HHZ. 2021-04-30T08:00:33.48 0.3 undecidable manual S 351 20.868 129 -0.43 68
IV.ECBD.HHZ. 2021-04-30T08:00:32.43 0.6 undecidable manual S 327 11.1777 148 0.24 48
IV.EMPL.HHZ. 2021-04-30T08:00:32.62 0.6 undecidable manual S 264 16.4724 137 -0.42 46
IV.EMFO.HHZ. 2021-04-30T08:00:31.88 0.6 undecidable manual S 307 7.2927 158 0.16 49
IV.ESPC.HHZ. 2021-04-30T08:00:31.85 0.6 undecidable manual S 268 11.2776 148 -0.35 47
IV.EVRN.HHZ. 2021-04-30T08:00:31.66 0.6 undecidable manual S 249 1.998 174 0.28 49
IV.AIO.HHZ. 2021-04-30T08:00:31.28 0.3 undecidable manual P 12 31.3464 116 -0.12 72
IV.EMSG.HHZ. 2021-04-30T08:00:30.70 0.1 undecidable manual P 308 22.8549 126 0.42 91
IV.EMPL.HHZ. 2021-04-30T08:00:29.41 0.3 undecidable manual P 264 16.4724 137 -0.13 73
IV.ESLN.HHZ. 2021-04-30T08:00:29.69 0.3 undecidable manual P 269 15.9729 138 0.19 72
IV.EMFS.HHZ. 2021-04-30T08:00:29.21 0.3 undecidable manual P 281 14.1747 142 -0.1 74
IV.ECTS.HHZ. 2021-04-30T08:00:29.75 0.1 undecidable manual P 351 20.868 129 -0.3 94
IV.EPOZ.HHZ. 2021-04-30T08:00:29.09 0.6 undecidable manual P 133 3.8961 168 0.46 46
IV.EMNR.HHZ. 2021-04-30T08:00:29.95 0.3 undecidable manual P 320 17.6712 135 0.28 71
IV.EPIT.HHZ. 2021-04-30T08:00:29.58 0.1 negative manual P 326 15.5733 139 0.13 98
IV.EMCN.HHZ. 2021-04-30T08:00:29.58 0.3 undecidable manual P 315 15.0738 140 0.17 73
IV.EMFO.HHZ. 2021-04-30T08:00:28.68 0.1 undecidable manual P 307 7.2927 158 -0.1 100
IV.EVRN.HHZ. 2021-04-30T08:00:28.39 0.3 undecidable manual P 249 1.998 174 -0.19 74
IV.ESAL.HHZ. 2021-04-30T08:00:28.66 0.1 negative manual P 344 6.8931 160 -0.1 100
IV.ESPC.HHZ. 2021-04-30T08:00:28.97 0.1 undecidable manual P 268 11.2776 148 -0.09 99
IV.ECBD.HHZ. 2021-04-30T08:00:28.97 0.1 undecidable manual P 327 11.1777 148 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESAL.HHE. ML:1.7 0.00040329995 0.2432 AML other m 2021-04-30T08:00:31.00
IV.ESAL.HHN. ML:1.5 0.0002460713 0.1408 AML other m 2021-04-30T08:00:32.93
IV.EPIT.HHN. ML:1.8 0.000341 0.54 AML other m 2021-04-30T08:00:33.60
IV.EPIT.HHE. ML:1.5 0.00019970275 0.6592 AML other m 2021-04-30T08:00:33.91
IV.AIO.HHE. ML:1.1 0.00004720000000000001 0.22 AML other m 2021-04-30T08:00:37.30
IV.AIO.HHN. ML:1.0 0.00003545 0.42 AML other m 2021-04-30T08:00:38.73
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