Earthquake with magnitude of ML 2.1 on date 24-01-2021 and time 09:02:46 (Italy) in region 1 km S Sant'Alfio (CT)

A magnitude ML 2.1 earthquake occured in region: 1 km S Sant'Alfio (CT), on

  • 24-01-2021 08:02:46 (UTC)
  • 24-01-2021 09:02:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7340, 15.1410 at 20 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sant'Alfio CT 1 1582 1582
Milo CT 2 1087 2669
Giarre CT 4 27659 30328
Santa Venerina CT 5 8592 38920
Zafferana Etnea CT 5 9517 48437
Mascali CT 6 14282 62719
Riposto CT 6 14838 77557
Fiumefreddo di Sicilia CT 9 9623 87180
Piedimonte Etneo CT 9 3963 91143
Linguaglossa CT 12 5403 96546
Calatabiano CT 13 5308 101854
Acireale CT 14 52622 154476
Trecastagni CT 14 10910 165386
Aci Sant'Antonio CT 14 17984 183370
Viagrande CT 14 8563 191933
Aci Catena CT 15 29851 221784
Pedara CT 15 14102 235886
Aci Bonaccorsi CT 15 3524 239410
Gaggi ME 16 3184 242594
Nicolosi CT 17 7463 250057
Castiglione di Sicilia CT 17 3215 253272
Giardini-Naxos ME 17 9415 262687
Valverde CT 17 7840 270527
San Giovanni la Punta CT 18 23060 293587
Taormina ME 18 10960 304547
Motta Camastra ME 18 845 305392
Castelmola ME 18 1088 306480
Tremestieri Etneo CT 19 20589 327069
Francavilla di Sicilia ME 19 3945 331014
San Gregorio di Catania CT 19 11966 342980
Graniti ME 19 1492 344472
Mascalucia CT 19 31958 376430
Aci Castello CT 20 18723 395153
Moio Alcantara ME 20 717 395870

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km N of Acireale (52622 inhabitants)
26 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
63 Km SW of Messina (238439 inhabitants)
76 Km N of Siracusa (122291 inhabitants)
97 Km NE of Ragusa (73313 inhabitants)
99 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 2.1 2021-01-24
08:02:46
37.7343 15.1408 20 2021-07-12
16:55:09
Bollettino Sismico Italiano INGV 89762761
Reviewed
Rev200
ML 1.8 2021-01-24
08:02:46
37.748 15.1 12 2021-05-04
10:51:45
Sala Operativa INGV_OE (Catania) 86522421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-24 08:02:46 ± 0.16
Latitude 37.7343 ± 0.0063
Longitude 15.1408 ± 0.0148
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89762761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1279
Semi-minor axis of confidence ellipse (meter) 345
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 284
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 29
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) 0.02158
Epicentral distance of station farthest from the epicenter (degree) 0.77432
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:2.1

Field Value
Value 2.1
Uncertainty 0.5
Num. used stations 13
Type of magnitude ML
Reference to an origin 89762761
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-04 10:51:30

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations
Type of magnitude ML
Reference to an origin 86522421
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-01-24 08:17:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HAVL.HHZ. 2021-01-24T08:03:12.45 0.6 undecidable manual S 181 85.9473 97 0.69 36
IV.SSY.HHZ. 2021-01-24T08:03:06.79 0.6 undecidable manual S 185 64.1913 99 0.78 36
IV.HLNI.HHZ. 2021-01-24T08:03:02.06 0.6 undecidable manual S 209 48.9177 103 0.07 46
IV.HAGA.HHZ. 2021-01-24T08:03:02.41 0.6 undecidable manual S 179 49.8168 103 0.17 45
IV.HAVL.HHZ. 2021-01-24T08:03:00.47 0.3 undecidable manual P 181 85.9473 97 -0.5 58
IV.SSY.HHZ. 2021-01-24T08:02:57.34 0.3 undecidable manual P 185 64.1913 99 -0.31 63
IV.AIO.HHZ. 2021-01-24T08:02:57.20 0.6 undecidable manual S 17 27.4503 116 0.62 41
IV.HAGA.HHZ. 2021-01-24T08:02:55.02 0.3 undecidable manual P 179 49.8168 103 -0.45 63
IV.ENIC.HHE. 2021-01-24T08:02:54.34 0.6 undecidable manual S 223 15.4734 135 0.39 45
IV.HLNI.HHZ. 2021-01-24T08:02:54.85 0.3 undecidable manual P 209 48.9177 103 -0.48 63
IV.ECTS.HHZ. 2021-01-24T08:02:54.37 0.6 undecidable manual S 354 16.4724 133 0.23 47
IV.EPOZ.HHZ. 2021-01-24T08:02:53.66 0.6 undecidable manual S 149 8.0808 154 0.87 39
IV.EFIU.HHE. 2021-01-24T08:02:52.44 0.6 undecidable manual S 45 8.6802 152 -0.42 45
IV.ECBD.HHN. 2021-01-24T08:02:52.05 0.6 undecidable manual S 317 6.993 157 -0.62 43
IV.AIO.HHZ. 2021-01-24T08:02:52.41 0.1 undecidable manual P 17 27.4503 116 0.21 92
IV.EVRN.HHZ. 2021-01-24T08:02:52.49 0.6 undecidable manual S 185 4.995 163 -0.01 50
IV.ESAL.HHE. 2021-01-24T08:02:52.40 0.6 undecidable manual S 346 2.3976 172 0.06 50
IV.ESPC.HHN. 2021-01-24T08:02:52.77 0.6 undecidable manual S 245 10.9779 146 -0.42 45
IV.ENIC.HHE. 2021-01-24T08:02:51.36 0.3 undecidable manual P 223 15.4734 135 0.67 62
IV.ECTS.HHZ. 2021-01-24T08:02:50.84 0.1 undecidable manual P 354 16.4724 133 0.04 97
IV.EPIT.HHN. 2021-01-24T08:02:50.57 0.3 undecidable manual P 319 11.2776 145 0.3 70
IV.EMNR.HHZ. 2021-01-24T08:02:50.95 0.3 undecidable manual P 312 13.5753 139 0.46 67
IV.ESPC.HHN. 2021-01-24T08:02:49.98 0.1 undecidable manual P 245 10.9779 146 -0.26 94
IV.EPOZ.HHZ. 2021-01-24T08:02:49.89 0.3 undecidable manual P 149 8.0808 154 -0.13 73
IV.EMFO.HHE. 2021-01-24T08:02:49.82 0.1 undecidable manual P 272 4.4955 165 0 100
IV.EFIU.HHE. 2021-01-24T08:02:49.73 0.1 undecidable manual P 45 8.6802 152 -0.33 93
IV.ECBD.HHN. 2021-01-24T08:02:49.99 0.1 undecidable manual P 317 6.993 157 0.04 99
IV.EVRN.HHZ. 2021-01-24T08:02:49.67 0.1 undecidable manual P 185 4.995 163 -0.18 96
IV.ESAL.HHE. 2021-01-24T08:02:49.58 0.1 undecidable manual P 346 2.3976 172 -0.18 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EVRN.HHN. ML:2.5 0.00277 0.16 AML other m 2021-01-24T08:02:52.64
IV.EVRN.HNN. ML:2.6 0.003535 0.2 AML other m 2021-01-24T08:02:52.64
IV.EVRN.HNE. ML:2.6 0.00326 1.18 AML other m 2021-01-24T08:02:52.77
IV.EVRN.HHE. ML:2.7 0.004165 1.2 AML other m 2021-01-24T08:02:52.77
IV.AIO.HHN. ML:1.5 0.00013388925000000002 0.2176 AML other m 2021-01-24T08:02:53.24
IV.AIO.HHE. ML:1.4 0.000110521335 0.2432 AML other m 2021-01-24T08:02:57.32
IV.HLNI.HHE. ML:1.2 0.00004172592350000001 0.1024 AML other m 2021-01-24T08:03:06.62
IV.HLNI.HHN. ML:1.2 0.00003812794 0.0832 AML other m 2021-01-24T08:03:05.19
IV.HAGA.HHE. ML:1.1 0.000031475609999999995 0.3648 AML other m 2021-01-24T08:03:03.32
IV.SSY.HHE. ML:2.1 0.00022859354999999997 0.3968 AML other m 2021-01-24T08:03:08.44
IV.SSY.HHN. ML:2.4 0.00042468985000000003 0.1216 AML other m 2021-01-24T08:03:08.94
IV.HAVL.HHN. ML:2.1 0.00014114525999999998 0.224 AML other m 2021-01-24T08:03:13.29
IV.HAVL.HHE. ML:2.1 0.00015859974999999998 0.256 AML other m 2021-01-24T08:03:13.56
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