Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 29-04-2021 and time 17:30:52 (Italy) in region 11 km W Milo (CT)

A magnitude ML 1.7 earthquake occured in region: 11 km W Milo (CT), on

  • 29-04-2021 15:30:52 (UTC)
  • 29-04-2021 17:30:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7540, 14.9960 at 1 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
Milo CT 11 1087 1087
Zafferana Etnea CT 12 9517 10604
Sant'Alfio CT 13 1582 12186
Maletto CT 14 3920 16106
Ragalna CT 15 3924 20030
Randazzo CT 15 10900 30930
Santa Venerina CT 15 8592 39522
Bronte CT 15 19172 58694
Nicolosi CT 16 7463 66157
Pedara CT 16 14102 80259
Linguaglossa CT 16 5403 85662
Biancavilla CT 17 24007 109669
Trecastagni CT 17 10910 120579
Giarre CT 17 27659 148238
Moio Alcantara ME 17 717 148955
Piedimonte Etneo CT 17 3963 152918
Adrano CT 18 36122 189040
Mascali CT 18 14282 203322
Santa Maria di Licodia CT 18 7641 210963
Belpasso CT 18 28108 239071
Castiglione di Sicilia CT 18 3215 242286
Viagrande CT 18 8563 250849
Santa Domenica Vittoria ME 18 980 251829
Riposto CT 19 14838 266667
Malvagna ME 19 733 267400
Fiumefreddo di Sicilia CT 19 9623 277023
Roccella Valdemone ME 20 666 277689
Aci Sant'Antonio CT 20 17984 295673
Aci Bonaccorsi CT 20 3524 299197

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Acireale (52622 inhabitants)
29 Km N of Catania (314555 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
69 Km SW of Messina (238439 inhabitants)
82 Km NW of Siracusa (122291 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
95 Km N of Ragusa (73313 inhabitants)
98 Km NE of Vittoria (63339 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 1.7 2021-04-29
15:30:52		 37.7543 14.9957 1 2021-07-12
16:55:16		 Bollettino Sismico Italiano INGV 91652031
Reviewed
Rev200 		ML 1.5 2021-04-29
15:30:51		 37.746 15.009 0 2021-06-21
10:56:26		 Sala Operativa INGV_OE (Catania) 89598531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-29 15:30:52 ± 0.09
Latitude 37.7543 ± 0.0045
Longitude 14.9957 ± 0.0068
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91652031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 580
Semi-minor axis of confidence ellipse (meter) 450
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
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) 54
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.01169
Epicentral distance of station farthest from the epicenter (degree) 0.14299
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 89598531
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-04-29 15:44:52

ML:1.7

Field Value
Value 1.7
Uncertainty 0.0
Num. used stations 2
Type of magnitude ML
Reference to an origin 91652031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-21 10:56:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EMPL.HHZ. 2021-04-29T15:30:56.31 0.6 undecidable manual S 195 8.6802 99 0.59 44
IV.ECZM.HHN. 2021-04-29T15:30:56.21 0.6 undecidable manual S 252 8.3805 100 0.57 44
IV.EMSG.HHZ. 2021-04-29T15:30:56.42 0.6 undecidable manual S 331 8.3805 100 0.8 41
IV.ESCV.HHZ. 2021-04-29T15:30:56.51 0.6 undecidable manual P 267 15.873 95 0.65 42
IV.EPIT.HHZ. 2021-04-29T15:30:55.98 0.6 undecidable manual S 40 8.2806 100 0.4 47
IV.EMNR.HHZ. 2021-04-29T15:30:55.96 0.6 undecidable manual S 21 7.3815 101 0.67 43
IV.ECBD.HHN. 2021-04-29T15:30:55.58 0.6 undecidable manual S 70 8.4804 100 -0.07 50
IV.ESAL.HHE. 2021-04-29T15:30:55.88 0.3 undecidable manual P 90 12.1767 97 0.75 62
IV.EMFO.HHE. 2021-04-29T15:30:55.80 0.6 undecidable manual S 104 8.5803 100 0.12 49
IV.ESPC.HHN. 2021-04-29T15:30:55.74 0.3 undecidable manual S 158 7.3815 101 0.45 69
IV.EMPL.HHZ. 2021-04-29T15:30:55.01 0.3 undecidable manual P 195 8.6802 99 0.58 66
IV.ESLN.HHZ. 2021-04-29T15:30:55.53 0.6 undecidable manual S 195 6.993 102 0.37 47
IV.EMSG.HHZ. 2021-04-29T15:30:54.45 0.3 undecidable manual P 331 8.3805 100 0.07 75
IV.EMCN.HHN. 2021-04-29T15:30:54.88 0.6 undecidable manual S 39 5.2947 105 0.31 48
IV.EPIT.HHZ. 2021-04-29T15:30:54.22 0.3 undecidable manual P 40 8.2806 100 -0.14 74
IV.EMNR.HHZ. 2021-04-29T15:30:54.08 0.1 undecidable manual P 21 7.3815 101 -0.11 99
IV.ECBD.HHN. 2021-04-29T15:30:54.57 0.1 undecidable manual P 70 8.4804 100 0.18 98
IV.ESVO.HHE. 2021-04-29T15:30:54.48 0.6 undecidable manual S 296 4.7952 107 0.09 50
IV.EMFO.HHE. 2021-04-29T15:30:54.34 0.1 undecidable manual P 104 8.5803 100 -0.07 100
IV.ESPC.HHN. 2021-04-29T15:30:54.04 0.1 undecidable manual P 158 7.3815 101 -0.14 99
IV.ECZM.HHN. 2021-04-29T15:30:54.63 0.3 undecidable manual P 252 8.3805 100 0.24 72
IV.EMFS.HHE. 2021-04-29T15:30:54.09 0.6 undecidable manual S 177 3.8961 110 -0.01 51
IV.ESLN.HHZ. 2021-04-29T15:30:53.88 0.1 undecidable manual P 195 6.993 102 -0.23 97
IV.ESVO.HHE. 2021-04-29T15:30:53.08 0.3 undecidable manual P 296 4.7952 107 -0.59 67
IV.EMCN.HHN. 2021-04-29T15:30:53.14 0.3 undecidable manual P 39 5.2947 105 -0.62 66
IV.ECPN.HHZ. 2021-04-29T15:30:52.27 0.1 undecidable manual P 214 1.3986 135 -0.81 82
IV.EMFS.HHE. 2021-04-29T15:30:52.71 0.3 undecidable manual P 177 3.8961 110 -0.79 61
IV.ECNE.HHN. 2021-04-29T15:30:52.96 0.6 undecidable manual S 24 1.2987 137 -0.39 47
IV.ECPN.HHZ. 2021-04-29T15:30:52.85 0.6 undecidable manual S 214 1.3986 135 -0.53 46
IV.ECNE.HHN. 2021-04-29T15:30:52.51 0.1 undecidable manual P 24 1.2987 137 -0.55 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMPL.HHN. ML:2.2 0.0031100000000000004 1.34 AML other m 2021-04-29T15:31:01.69
IV.EMSG.HHN. ML:1.7 0.000814 0.48 AML other m 2021-04-29T15:31:01.08
IV.EMSG.HHE. ML:1.7 0.0009315 0.7 AML other m 2021-04-29T15:31:02.82
IV.EMPL.HHE. ML:2.1 0.00244 1.7 AML other m 2021-04-29T15:31:04.02
IV.ESCV.HHE. ML:1.7 0.000504 1.58 AML other m 2021-04-29T15:31:07.94
IV.ESCV.HHN. ML:1.7 0.000565 0.42 AML other m 2021-04-29T15:31:08.04
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