Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 16-01-2021 and time 02:23:36 (UTC) in region 11 km W Milo (CT)

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

  • 16-01-2021 02:23:36 (UTC)
  • 16-01-2021 03:23:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7500, 14.9990 at 0 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 11 9517 10604
Sant'Alfio CT 13 1582 12186
Ragalna CT 14 3924 16110
Santa Venerina CT 14 8592 24702
Maletto CT 15 3920 28622
Randazzo CT 15 10900 39522
Bronte CT 15 19172 58694
Nicolosi CT 15 7463 66157
Pedara CT 16 14102 80259
Trecastagni CT 16 10910 91169
Linguaglossa CT 16 5403 96572
Giarre CT 17 27659 124231
Biancavilla CT 17 24007 148238
Piedimonte Etneo CT 17 3963 152201
Mascali CT 17 14282 166483
Moio Alcantara ME 17 717 167200
Adrano CT 18 36122 203322
Belpasso CT 18 28108 231430
Viagrande CT 18 8563 239993
Santa Maria di Licodia CT 18 7641 247634
Riposto CT 18 14838 262472
Castiglione di Sicilia CT 18 3215 265687
Santa Domenica Vittoria ME 19 980 266667
Fiumefreddo di Sicilia CT 19 9623 276290
Aci Bonaccorsi CT 19 3524 279814
Aci Sant'Antonio CT 20 17984 297798
Malvagna ME 20 733 298531
San Pietro Clarenza CT 20 7743 306274

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
28 Km N of Catania (314555 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
70 Km SW of Messina (238439 inhabitants)
81 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 2021-01-16
02:23:36		 37.75 14.999 0 2021-07-12
16:54:59		 Bollettino Sismico Italiano INGV 87271491
Reviewed
Rev200 		ML 1.6 2021-01-16
02:23:35		 37.75 15.002 1 2021-03-04
11:47:59		 Sala Operativa INGV_OE (Catania) 86286961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-16 02:23:36 ± 0.08
Latitude 37.7500 ± 0.0036
Longitude 14.9990 ± 0.0057
Depth (km) 0 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87271491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 151
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.01169
Epicentral distance of station farthest from the epicenter (degree) 0.30937
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 87271491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-04 11:47:49

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 86286961
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-16 02:34:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHE. 2021-01-16T02:23:43.10 1.0 undecidable manual P 341 34.3434 91 -0.2 23
IV.AIO.HHE. 2021-01-16T02:23:42.97 1.0 undecidable manual P 40 31.9458 91 0.13 24
IV.EFIU.HHZ. 2021-01-16T02:23:41.19 0.6 undecidable manual P 77 19.0698 91 0.94 37
IV.ECTS.HHZ. 2021-01-16T02:23:40.03 0.1 undecidable manual P 36 18.1707 91 -0.03 99
IV.ESCV.HHN. 2021-01-16T02:23:40.11 1.0 undecidable manual P 269 16.1727 91 0.45 23
IV.ESML.HHZ. 2021-01-16T02:23:40.48 0.6 undecidable manual P 216 17.9709 91 0.44 45
IV.ESPC.HHN. 2021-01-16T02:23:39.21 0.6 undecidable manual S 159 6.8931 93 0.4 47
IV.ENIC.HHZ. 2021-01-16T02:23:39.45 0.3 undecidable manual P 171 13.2756 92 0.35 70
IV.EPZF.HHZ. 2021-01-16T02:23:39.72 0.3 undecidable manual P 303 14.874 91 0.3 71
IV.EMCN.HNZ. 2021-01-16T02:23:38.56 0.6 undecidable manual S 34 5.4945 94 0.22 49
IV.ECZM.HHN. 2021-01-16T02:23:38.03 0.3 undecidable manual P 256 8.5803 92 -0.12 74
IV.ESVO.HHE. 2021-01-16T02:23:38.90 0.6 undecidable manual S 299 5.1948 94 0.65 43
IV.EMSG.HHZ. 2021-01-16T02:23:38.35 0.3 undecidable manual P 331 8.9799 92 0.12 74
IV.EPIT.HHN. 2021-01-16T02:23:38.07 0.1 undecidable manual P 37 8.4804 93 -0.06 100
IV.ECBD.HHN. 2021-01-16T02:23:38.05 0.3 undecidable manual P 66 8.3805 93 -0.06 75
IV.EMFS.HHE. 2021-01-16T02:23:37.84 0.6 undecidable manual S 182 3.3966 96 0.23 49
IV.EMFO.HHE. 2021-01-16T02:23:37.97 0.3 undecidable manual P 101 8.1807 93 -0.1 74
IV.ESLN.HHZ. 2021-01-16T02:23:37.54 0.1 undecidable manual P 199 6.6933 93 -0.22 97
IV.ECNE.HHN. 2021-01-16T02:23:37.35 0.6 undecidable manual S 8 1.6983 102 0.31 48
IV.EMPL.HHZ. 2021-01-16T02:23:37.84 0.3 undecidable manual P 198 8.2806 93 -0.25 72
IV.ESPC.HHN. 2021-01-16T02:23:37.57 0.3 undecidable manual P 159 6.8931 93 -0.23 73
IV.EMCN.HNZ. 2021-01-16T02:23:37.28 0.1 undecidable manual P 34 5.4945 94 -0.25 97
IV.ESVO.HHE. 2021-01-16T02:23:37.07 0.1 undecidable manual P 299 5.1948 94 -0.41 93
IV.ECPN.HHZ. 2021-01-16T02:23:37.06 0.3 undecidable manual S 237 1.2987 106 0.16 74
IV.ECPN.HHZ. 2021-01-16T02:23:36.43 0.1 undecidable manual P 237 1.2987 106 -0.27 97
IV.ECNE.HHN. 2021-01-16T02:23:36.52 0.1 undecidable manual P 8 1.6983 102 -0.26 97
IV.EMFS.HHE. 2021-01-16T02:23:36.93 0.3 undecidable manual P 182 3.3966 96 -0.18 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ENIC.HNN. ML:2.1 0.0015483765 0.9904 AML other m 2021-01-16T02:23:39.50
IV.ENIC.HHE. ML:1.8 0.0008562455 0.2608 AML other m 2021-01-16T02:23:45.79
IV.ENIC.HHN. ML:1.7 0.0007065579 0.2 AML other m 2021-01-16T02:23:46.92
IV.ECTS.HHN. ML:1.3 0.00020619255000000003 0.96 AML other m 2021-01-16T02:23:47.00
IV.ENIC.HNE. ML:2.0 0.001432311 0.5616 AML other m 2021-01-16T02:23:47.08
IV.ECTS.HHE. ML:1.3 0.00018568835 0.6992 AML other m 2021-01-16T02:23:47.57
IV.ESML.HHN. ML:1.6 0.00034199999999999996 0.76 AML other m 2021-01-16T02:23:50.05
IV.ESML.HHE. ML:1.6 0.00040841875 0.5792 AML other m 2021-01-16T02:23:51.05
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