Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 02-08-2021 and time 08:24:42 (Italy) in region 3 km SE Fiumefreddo di Sicilia (CT)

A magnitude ML 1.5 earthquake occured in region: 3 km SE Fiumefreddo di Sicilia (CT), on

  • 02-08-2021 06:24:42 (UTC)
  • 02-08-2021 08:24:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7750, 15.2280 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
Fiumefreddo di Sicilia CT 3 9623 9623
Mascali CT 3 14282 23905
Riposto CT 5 14838 38743
Calatabiano CT 6 5308 44051
Piedimonte Etneo CT 6 3963 48014
Giarre CT 6 27659 75673
Sant'Alfio CT 8 1582 77255
Giardini-Naxos ME 9 9415 86670
Gaggi ME 10 3184 89854
Taormina ME 10 10960 100814
Castelmola ME 10 1088 101902
Linguaglossa CT 10 5403 107305
Milo CT 11 1087 108392
Santa Venerina CT 12 8592 116984
Graniti ME 13 1492 118476
Letojanni ME 14 2861 121337
Zafferana Etnea CT 14 9517 130854
Motta Camastra ME 14 845 131699
Mongiuffi Melia ME 15 600 132299
Castiglione di Sicilia CT 15 3215 135514
Gallodoro ME 15 367 135881
Francavilla di Sicilia ME 16 3945 139826
Roccafiorita ME 18 197 140023
Forza d'Agrò ME 18 911 140934
Acireale CT 19 52622 193556
Sant'Alessio Siculo ME 19 1554 195110
Limina ME 19 836 195946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km N of Acireale (52622 inhabitants)
33 Km NE of Catania (314555 inhabitants)
52 Km SW of Reggio di Calabria (183035 inhabitants)
55 Km SW of Messina (238439 inhabitants)
80 Km N of Siracusa (122291 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 2021-08-02
06:24:42		 37.7748 15.2277 11 2021-12-29
11:12:51		 Bollettino Sismico Italiano INGV 97383081
Reviewed
Rev200 		ML 1.4 2021-08-02
06:24:42		 37.759 15.205 8 2021-11-10
16:20:09		 Sala Operativa INGV_OE (Catania) 93549341
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-02 06:24:42 ± 0.18
Latitude 37.7748 ± 0.0063
Longitude 15.2277 ± 0.0114
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97383081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1077
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 113
Circular confidence region, given by single value of horizontal uncertainty (meter) 1080.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 196
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.01979
Epicentral distance of station farthest from the epicenter (degree) 0.26260
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:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 93549341
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-08-02 06:34:00

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 97383081
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-10 16:19:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EMFS.HHE. 2021-08-02T06:24:51.12 0.6 undecidable manual S 253 21.0678 116 0.4 46
IV.AIO.HHE. 2021-08-02T06:24:51.03 0.6 undecidable manual S 1 21.7671 116 0.09 49
IV.EMSG.HHZ. 2021-08-02T06:24:48.22 0.3 undecidable manual P 282 24.8529 50 0.33 69
IV.ECBD.HHN. 2021-08-02T06:24:48.38 0.6 undecidable manual S 273 12.3765 130 0.2 48
IV.NOV.HHZ. 2021-08-02T06:24:48.29 0.3 undecidable manual P 344 29.1486 50 -0.27 70
IV.ECTS.HHZ. 2021-08-02T06:24:48.97 0.6 undecidable manual S 322 15.0738 125 0.04 50
IV.EMFO.HHE. 2021-08-02T06:24:48.11 0.6 undecidable manual S 250 12.7761 129 -0.19 49
IV.EPOZ.HHZ. 2021-08-02T06:24:48.94 0.6 undecidable manual S 197 11.877 131 0.88 39
IV.EMNR.HHZ. 2021-08-02T06:24:47.15 0.3 undecidable manual P 285 18.2706 120 0.37 69
IV.AIO.HHE. 2021-08-02T06:24:47.86 0.3 undecidable manual P 1 21.7671 116 0.46 68
IV.ECTS.HHZ. 2021-08-02T06:24:46.16 0.1 undecidable manual P 322 15.0738 125 -0.08 99
IV.ESPC.HHN. 2021-08-02T06:24:46.68 0.1 undecidable manual P 243 19.7691 118 -0.37 92
IV.EPDN.HHZ. 2021-08-02T06:24:46.84 0.3 undecidable manual P 267 18.4704 119 0.02 75
IV.EMFS.HHE. 2021-08-02T06:24:46.98 0.1 undecidable manual P 253 21.0678 116 -0.29 94
IV.EFIU.HHZ. 2021-08-02T06:24:46.20 0.6 undecidable manual S 317 2.1978 168 -0.07 51
IV.EMCN.HHN. 2021-08-02T06:24:46.84 0.3 undecidable manual P 276 17.0718 121 0.26 71
IV.EMFO.HHE. 2021-08-02T06:24:45.61 0.1 undecidable manual P 250 12.7761 129 -0.26 96
IV.EPOZ.HHZ. 2021-08-02T06:24:45.92 0.3 undecidable manual P 197 11.877 131 0.18 73
IV.ECBD.HHN. 2021-08-02T06:24:45.76 0.1 undecidable manual P 273 12.3765 130 -0.05 100
IV.EFIU.HHZ. 2021-08-02T06:24:44.46 0.1 negative manual P 317 2.1978 168 -0.24 98
IV.ESAL.HHZ. 2021-08-02T06:24:44.96 0.1 negative manual P 255 8.4804 141 -0.29 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ECTS.HHE. ML:1.4 0.000259 0.94 AML other m 2021-08-02T06:24:49.51
IV.ECTS.HHN. ML:1.2 0.00016450000000000001 0.42 AML other m 2021-08-02T06:24:50.08
IV.EMSG.HHN. ML:1.7 0.000313 0.6 AML other m 2021-08-02T06:24:56.53
IV.EMSG.HHE. ML:1.7 0.00026700000000000004 1.28 AML other m 2021-08-02T06:24:57.80
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