Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 24-01-2021 and time 11:58:47 (Italy) in region 3 km SW Giarre (CT)

A magnitude ML 1.6 earthquake occured in region: 3 km SW Giarre (CT), on

  • 24-01-2021 10:58:47 (UTC)
  • 24-01-2021 11:58:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7130, 15.1610 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
Giarre CT 3 27659 27659
Santa Venerina CT 3 8592 36251
Sant'Alfio CT 4 1582 37833
Milo CT 4 1087 38920
Riposto CT 4 14838 53758
Zafferana Etnea CT 5 9517 63275
Mascali CT 6 14282 77557
Fiumefreddo di Sicilia CT 10 9623 87180
Piedimonte Etneo CT 11 3963 91143
Acireale CT 11 52622 143765
Aci Sant'Antonio CT 12 17984 161749
Aci Catena CT 12 29851 191600
Viagrande CT 13 8563 200163
Trecastagni CT 13 10910 211073
Aci Bonaccorsi CT 13 3524 214597
Pedara CT 14 14102 228699
Calatabiano CT 14 5308 234007
Linguaglossa CT 14 5403 239410
Valverde CT 15 7840 247250
Nicolosi CT 16 7463 254713
San Giovanni la Punta CT 16 23060 277773
San Gregorio di Catania CT 17 11966 289739
Tremestieri Etneo CT 17 20589 310328
Aci Castello CT 17 18723 329051
Gaggi ME 17 3184 332235
Giardini-Naxos ME 18 9415 341650
Mascalucia CT 18 31958 373608
Sant'Agata li Battiati CT 18 9479 383087
Gravina di Catania CT 19 25838 408925
Taormina ME 19 10960 419885
Castelmola ME 19 1088 420973
Castiglione di Sicilia CT 19 3215 424188
San Pietro Clarenza CT 20 7743 431931

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km N of Acireale (52622 inhabitants)
24 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
64 Km SW of Messina (238439 inhabitants)
73 Km N of Siracusa (122291 inhabitants)
95 Km NE of Ragusa (73313 inhabitants)
100 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 1.6 2021-01-24
10:58:47		 37.7127 15.1612 17 2021-07-12
16:55:14		 Bollettino Sismico Italiano INGV 91140961
Reviewed
Rev200 		ML 1.7 2021-01-24
10:58:47		 37.729 15.093 12 2021-06-12
07:07:59		 Sala Operativa INGV_OE (Catania) 86527741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-24 10:58:47 ± 0.22
Latitude 37.7127 ± 0.0072
Longitude 15.1612 ± 0.0148
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 91140961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1153
Semi-minor axis of confidence ellipse (meter) 761
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.03058
Epicentral distance of station farthest from the epicenter (degree) 0.42988
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:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 91140961
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-12 07:07:29

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 86527741
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-24 11:31:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2021-01-24T10:59:02.37 0.6 undecidable manual S 326 44.4222 101 0.46 42
IV.HLNI.HHZ. 2021-01-24T10:59:02.76 0.6 undecidable manual S 212 47.7189 100 -0.01 46
IV.AIO.HHN. 2021-01-24T10:58:58.36 0.6 undecidable manual S 12 29.3484 109 0.35 44
IV.MUCR.HHZ. 2021-01-24T10:58:56.78 0.6 undecidable manual P 326 44.4222 101 0.99 34
IV.ENIC.HHN. 2021-01-24T10:58:55.11 0.6 undecidable manual S 234 15.1737 130 0.43 45
IV.ECTS.HHZ. 2021-01-24T10:58:55.38 0.6 undecidable manual S 349 19.0698 122 -0.14 48
IV.HLNI.HHZ. 2021-01-24T10:58:55.83 0.3 undecidable manual P 212 47.7189 100 -0.46 62
IV.EFIU.HHE. 2021-01-24T10:58:54.05 0.6 undecidable manual S 27 9.5793 145 0.39 45
IV.EMPL.HHZ. 2021-01-24T10:58:54.62 0.6 undecidable manual S 257 17.1717 126 -0.47 44
IV.ESPC.HHN. 2021-01-24T10:58:53.58 0.6 undecidable manual S 259 11.9769 138 -0.47 45
IV.AIO.HHN. 2021-01-24T10:58:53.35 0.1 undecidable manual P 12 29.3484 109 -0.19 93
IV.EVRN.HHZ. 2021-01-24T10:58:53.38 0.6 undecidable manual S 221 3.3966 167 0.4 46
IV.EPOZ.HHN. 2021-01-24T10:58:53.47 0.6 undecidable manual S 152 5.0949 160 0.36 47
IV.EMPL.HHZ. 2021-01-24T10:58:52.47 0.3 undecidable manual P 257 17.1717 126 0.61 64
IV.ESAL.HHE. 2021-01-24T10:58:52.61 0.6 undecidable manual S 334 5.2947 160 -0.51 45
IV.ENIC.HHN. 2021-01-24T10:58:52.35 0.3 undecidable manual P 234 15.1737 130 0.73 61
IV.EPIT.HHN. 2021-01-24T10:58:51.29 0.3 undecidable manual P 320 14.2746 132 -0.22 71
IV.ECTS.HHZ. 2021-01-24T10:58:51.75 0.3 undecidable manual P 349 19.0698 122 -0.35 68
IV.EVRN.HHZ. 2021-01-24T10:58:50.65 0.1 undecidable manual P 221 3.3966 167 0.01 100
IV.ECBD.HHN. 2021-01-24T10:58:50.98 0.1 undecidable manual P 319 9.9789 144 -0.08 98
IV.EFIU.HHE. 2021-01-24T10:58:50.69 0.3 undecidable manual P 27 9.5793 145 -0.34 70
IV.EPOZ.HHN. 2021-01-24T10:58:50.91 0.3 undecidable manual P 152 5.0949 160 0.2 72
IV.EMFO.HHE. 2021-01-24T10:58:50.80 0.3 undecidable manual P 292 6.6933 155 -0.01 75
IV.ESPC.HHN. 2021-01-24T10:58:50.96 0.1 undecidable manual P 259 11.9769 138 -0.3 93
IV.ESAL.HHE. 2021-01-24T10:58:50.48 0.1 undecidable manual P 334 5.2947 160 -0.24 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPOZ.HHE. ML:0.0 0.0007105 0.7 AML other m 2021-01-24T10:58:55.41
IV.EPOZ.HHN. ML:1.9 0.0007855000000000001 1.1 AML other m 2021-01-24T10:58:56.84
IV.AIO.HHN. ML:1.5 0.000136018 0.3648 AML other m 2021-01-24T10:58:59.76
IV.AIO.HHE. ML:1.2 0.00006390591500000001 0.1792 AML other m 2021-01-24T10:58:59.06
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