Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 25-01-2021 and time 07:56:38 (UTC) in region 2 km E Milo (CT)

A magnitude ML 1.7 earthquake occured in region: 2 km E Milo (CT), on

  • 25-01-2021 07:56:38 (UTC)
  • 25-01-2021 08:56:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7260, 15.1340 at 17 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 2 1087 1087
Sant'Alfio CT 2 1582 2669
Santa Venerina CT 4 8592 11261
Zafferana Etnea CT 4 9517 20778
Giarre CT 5 27659 48437
Riposto CT 6 14838 63275
Mascali CT 7 14282 77557
Piedimonte Etneo CT 10 3963 81520
Fiumefreddo di Sicilia CT 10 9623 91143
Acireale CT 13 52622 143765
Trecastagni CT 13 10910 154675
Linguaglossa CT 13 5403 160078
Viagrande CT 13 8563 168641
Aci Sant'Antonio CT 13 17984 186625
Pedara CT 14 14102 200727
Aci Catena CT 14 29851 230578
Calatabiano CT 14 5308 235886
Aci Bonaccorsi CT 14 3524 239410
Nicolosi CT 16 7463 246873
Valverde CT 16 7840 254713
San Giovanni la Punta CT 17 23060 277773
Gaggi ME 17 3184 280957
Tremestieri Etneo CT 17 20589 301546
Castiglione di Sicilia CT 18 3215 304761
San Gregorio di Catania CT 18 11966 316727
Giardini-Naxos ME 18 9415 326142
Mascalucia CT 18 31958 358100
Aci Castello CT 19 18723 376823
Sant'Agata li Battiati CT 19 9479 386302
Motta Camastra ME 19 845 387147
Gravina di Catania CT 19 25838 412985
Taormina ME 19 10960 423945
San Pietro Clarenza CT 20 7743 431688
Castelmola ME 20 1088 432776
Francavilla di Sicilia ME 20 3945 436721

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km N of Acireale (52622 inhabitants)
25 Km N of Catania (314555 inhabitants)
62 Km SW of Reggio di Calabria (183035 inhabitants)
64 Km SW of Messina (238439 inhabitants)
75 Km N of Siracusa (122291 inhabitants)
96 Km NE of Ragusa (73313 inhabitants)
98 Km E of Caltanissetta (63360 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 2021-01-25
07:56:38		 37.7258 15.1338 17 2021-07-12
16:55:01		 Bollettino Sismico Italiano INGV 87781141
Reviewed
Rev200 		ML 2.2 2021-01-25
07:56:38		 37.732 15.059 15 2021-03-05
15:00:32		 Sala Operativa INGV_OE (Catania) 86553431
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-25 07:56:38 ± 0.17
Latitude 37.7258 ± 0.0063
Longitude 15.1338 ± 0.0193
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87781141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1607
Semi-minor axis of confidence ellipse (meter) 517
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 272
Circular confidence region, given by single value of horizontal uncertainty (meter) 1610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.03687
Epicentral distance of station farthest from the epicenter (degree) 0.56927
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 87781141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-05 15:00:10

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 86553431
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-25 08:07:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSY.HHZ. 2021-01-25T07:56:58.46 0.6 undecidable manual S 185 63.1923 96 0.34 42
IV.HCRL.HHZ. 2021-01-25T07:56:54.64 0.6 undecidable manual S 190 49.9167 98 0.05 46
IV.HLNI.HHZ. 2021-01-25T07:56:53.90 0.6 undecidable manual S 209 47.8188 99 -0.13 45
IV.NOV.HHZ. 2021-01-25T07:56:51.19 0.6 undecidable manual S 0 33.5442 105 0.89 38
IV.MUCR.HHE. 2021-01-25T07:56:51.74 0.6 undecidable manual S 327 41.9247 101 -0.75 37
IV.SSY.HHZ. 2021-01-25T07:56:50.32 0.3 undecidable manual P 185 63.1923 96 0.41 63
IV.HCRL.HHZ. 2021-01-25T07:56:47.46 0.1 undecidable manual P 190 49.9167 98 -0.41 85
IV.MUCR.HHE. 2021-01-25T07:56:47.13 0.3 undecidable manual P 327 41.9247 101 0.47 65
IV.HLNI.HHZ. 2021-01-25T07:56:46.89 0.3 undecidable manual P 209 47.8188 99 -0.66 58
IV.ECTS.HHZ. 2021-01-25T07:56:45.99 0.6 undecidable manual S 356 17.3715 124 -0.34 46
IV.NOV.HHZ. 2021-01-25T07:56:45.21 0.3 undecidable manual P 0 33.5442 105 -0.19 68
IV.EPZF.HHZ. 2021-01-25T07:56:45.37 0.3 undecidable manual P 294 26.6511 110 0.99 55
IV.EVRN.HHZ. 2021-01-25T07:56:44.65 0.3 undecidable manual S 178 4.0959 164 0.48 67
IV.ESPC.HHN. 2021-01-25T07:56:44.81 0.6 undecidable manual S 249 10.0788 143 -0.09 49
IV.EPIT.HHN. 2021-01-25T07:56:44.55 0.6 undecidable manual S 325 11.6772 138 -0.62 43
IV.AIO.HHZ. 2021-01-25T07:56:44.50 0.1 undecidable manual P 18 28.5492 108 -0.17 92
IV.EMNR.HHZ. 2021-01-25T07:56:43.05 0.3 undecidable manual P 317 13.875 132 0.37 69
IV.ESPC.HHN. 2021-01-25T07:56:42.03 0.1 undecidable manual P 249 10.0788 143 -0.25 94
IV.EMPL.HHZ. 2021-01-25T07:56:42.62 0.3 undecidable manual P 250 15.2736 128 -0.23 70
IV.ECTS.HHZ. 2021-01-25T07:56:42.91 0.3 undecidable manual P 356 17.3715 124 -0.2 70
IV.EPIT.HHN. 2021-01-25T07:56:42.80 0.3 undecidable manual P 325 11.6772 138 0.36 70
IV.EVRN.HHZ. 2021-01-25T07:56:41.82 0.1 undecidable manual P 178 4.0959 164 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ECTS.HHE. ML:1.9 0.0005374606 0.3968 AML other m 2021-01-25T07:56:47.20
IV.ECTS.HHN. ML:1.8 0.0004816616 0.3776 AML other m 2021-01-25T07:56:46.65
IV.AIO.HHE. ML:1.5 0.00013314592999999998 0.2432 AML other m 2021-01-25T07:56:49.84
IV.AIO.HHN. ML:1.5 0.00016091785 0.2176 AML other m 2021-01-25T07:56:50.56
IV.NOV.HHN. ML:2.1 0.00046703505 0.4032 AML other m 2021-01-25T07:56:52.33
IV.NOV.HHE. ML:2.2 0.00064169825 0.576 AML other m 2021-01-25T07:56:51.25
IV.HLNI.HHN. ML:1.3 0.00005514118499999999 0.1408 AML other m 2021-01-25T07:56:58.44
IV.HLNI.HHE. ML:1.3 0.000054722985000000003 0.1024 AML other m 2021-01-25T07:56:54.89
IV.HCRL.HHN. ML:1.4 0.000062254215 0.096 AML other m 2021-01-25T07:56:55.57
IV.HCRL.HHE. ML:1.6 0.000102982105 0.1216 AML other m 2021-01-25T07:56:55.46
IV.SSY.HHN. ML:2.3 0.00035065345 0.1216 AML other m 2021-01-25T07:57:04.01
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