Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 10-12-2021 and time 19:21:46 (Italy) in region 11 km W Milo (CT)

A magnitude ML 1.8 earthquake occured in region: 11 km W Milo (CT), on

  • 10-12-2021 18:21:46 (UTC)
  • 10-12-2021 19:21:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7440, 14.9980 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 11 9517 10604
Sant'Alfio CT 13 1582 12186
Ragalna CT 14 3924 16110
Santa Venerina CT 14 8592 24702
Nicolosi CT 15 7463 32165
Maletto CT 15 3920 36085
Pedara CT 15 14102 50187
Bronte CT 15 19172 69359
Randazzo CT 16 10900 80259
Trecastagni CT 16 10910 91169
Biancavilla CT 16 24007 115176
Giarre CT 17 27659 142835
Linguaglossa CT 17 5403 148238
Adrano CT 17 36122 184360
Belpasso CT 17 28108 212468
Santa Maria di Licodia CT 17 7641 220109
Viagrande CT 17 8563 228672
Mascali CT 18 14282 242954
Piedimonte Etneo CT 18 3963 246917
Moio Alcantara ME 18 717 247634
Riposto CT 18 14838 262472
Aci Bonaccorsi CT 19 3524 265996
Aci Sant'Antonio CT 19 17984 283980
Castiglione di Sicilia CT 19 3215 287195
San Pietro Clarenza CT 19 7743 294938
Santa Domenica Vittoria ME 19 980 295918
Fiumefreddo di Sicilia CT 19 9623 305541
Mascalucia CT 20 31958 337499
Camporotondo Etneo CT 20 5023 342522
Tremestieri Etneo CT 20 20589 363111

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Acireale (52622 inhabitants)
28 Km N of Catania (314555 inhabitants)
70 Km SW of Reggio di Calabria (183035 inhabitants)
70 Km SW of Messina (238439 inhabitants)
80 Km NW of Siracusa (122291 inhabitants)
87 Km E of Caltanissetta (63360 inhabitants)
94 Km N of Ragusa (73313 inhabitants)
97 Km NE of Vittoria (63339 inhabitants)
100 Km NE of Gela (75827 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 1.8 2021-12-10
18:21:46		 37.7442 14.9975 1 2022-03-30
13:04:36		 Bollettino Sismico Italiano INGV 100745701
Reviewed
Rev200 		ML 1.8 2021-12-10
18:21:45		 37.745 15.004 1 2022-02-17
17:08:40		 Sala Operativa INGV_OE (Catania) 98384551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-10 18:21:46 ± 0.06
Latitude 37.7442 ± 0.0036
Longitude 14.9975 ± 0.0045
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100745701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 410
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 309
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.02428
Epicentral distance of station farthest from the epicenter (degree) 0.29318
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:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 100745701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-08 02:36:28

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 98384551
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2021-12-10 18:24:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ECTS.HHZ. 2021-12-10T18:21:53.61 0.6 undecidable manual S 35 18.7701 94 0.83 39
IV.EPOZ.HHZ. 2021-12-10T18:21:53.75 3.0 undecidable manual S 115 18.5703 94 1.02 0
IV.EFIU.HHN. 2021-12-10T18:21:53.36 0.6 undecidable manual S 75 19.3695 94 0.37 46
IV.AIO.HHN. 2021-12-10T18:21:52.94 0.3 positive manual P 39 32.5452 92 0.14 71
IV.EPZF.HHN. 2021-12-10T18:21:51.93 0.6 undecidable manual S 306 15.1737 95 0.38 46
IV.ESAL.HHZ. 2021-12-10T18:21:51.53 0.6 undecidable manual S 84 12.0768 96 1.05 36
IV.EFIU.HHN. 2021-12-10T18:21:50.40 1.0 undecidable manual P 75 19.3695 94 0.25 24
IV.ECTS.HHZ. 2021-12-10T18:21:50.03 0.1 negative manual P 35 18.7701 94 0 99
IV.EPOZ.HHZ. 2021-12-10T18:21:50.20 0.1 negative manual P 115 18.5703 94 0.21 95
IV.ESML.HHZ. 2021-12-10T18:21:50.03 0.1 undecidable manual P 217 17.3715 94 0.27 94
IV.EPZF.HHN. 2021-12-10T18:21:49.31 0.1 undecidable manual P 306 15.1737 95 0 100
IV.ECBD.HHN. 2021-12-10T18:21:49.73 0.6 undecidable manual S 63 8.7801 98 0.39 47
IV.ESCV.HHE. 2021-12-10T18:21:49.90 0.6 undecidable manual P 271 15.9729 94 0.42 46
IV.EMPL.HHZ. 2021-12-10T18:21:49.20 0.6 undecidable manual S 198 7.5813 99 0.26 48
IV.ECZM.HHN. 2021-12-10T18:21:48.01 0.1 undecidable manual P 260 8.2806 99 0.06 100
IV.ESAL.HHZ. 2021-12-10T18:21:48.69 0.6 undecidable manual P 84 12.0768 96 -0.01 50
IV.ESVO.HHE. 2021-12-10T18:21:48.26 0.6 undecidable manual S 306 5.4945 103 0.04 50
IV.EMCN.HHN. 2021-12-10T18:21:48.54 0.6 undecidable manual S 31 6.0939 102 0.11 50
IV.ECHR.HHE. 2021-12-10T18:21:48.60 0.1 undecidable manual P 229 9.7791 97 0.35 94
IV.ESPC.HHN. 2021-12-10T18:21:48.78 0.6 undecidable manual S 155 6.2937 101 0.29 48
IV.ESLN.HHZ. 2021-12-10T18:21:48.60 0.6 undecidable manual S 200 5.994 102 0.22 49
IV.EVRN.HNN. 2021-12-10T18:21:48.85 0.1 undecidable manual P 117 13.5753 95 -0.14 97
IV.ESPC.HHN. 2021-12-10T18:21:47.13 0.1 undecidable manual P 155 6.2937 101 -0.42 93
IV.EPDN.HHZ. 2021-12-10T18:21:47.50 0.6 undecidable manual S 35 2.997 113 0.12 50
IV.EMFS.HHE. 2021-12-10T18:21:47.48 0.6 undecidable manual S 179 2.6973 115 0.17 49
IV.EMFO.HHE. 2021-12-10T18:21:47.40 0.1 undecidable manual P 96 8.1807 99 -0.53 90
IV.EMPL.HHZ. 2021-12-10T18:21:47.73 0.1 undecidable manual P 198 7.5813 99 -0.08 100
IV.ESLN.HHZ. 2021-12-10T18:21:47.17 0.1 undecidable manual P 200 5.994 102 -0.32 95
IV.EPIT.HHN. 2021-12-10T18:21:47.91 0.6 undecidable manual P 35 9.0798 98 -0.2 49
IV.ECBD.HHN. 2021-12-10T18:21:47.68 0.1 undecidable manual P 63 8.7801 98 -0.36 94
IV.EMCN.HHN. 2021-12-10T18:21:47.16 0.1 undecidable manual P 31 6.0939 102 -0.36 94
IV.EPDN.HHZ. 2021-12-10T18:21:46.59 0.1 undecidable manual P 35 2.997 113 -0.31 96
IV.EMFS.HHE. 2021-12-10T18:21:46.63 0.1 undecidable manual P 179 2.6973 115 -0.23 97
IV.ESVO.HHE. 2021-12-10T18:21:46.96 0.1 undecidable manual P 306 5.4945 103 -0.43 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EPIT.HHE. ML:0.0 0.001589851 0.3712 AML other m 2021-12-10T18:21:51.23
IV.EMPL.HHN. ML:0.0 0.0075535705 0.2048 AML other m 2021-12-10T18:21:49.26
IV.ESAL.HHN. ML:1.7 0.00072005215 0.9344 AML other m 2021-12-10T18:21:52.38
IV.EMPL.HHE. ML:0.0 0.0099645975 0.2432 AML other m 2021-12-10T18:21:50.66
IV.EPIT.HHN. ML:0.0 0.002136331 0.576 AML other m 2021-12-10T18:21:51.07
IV.ESML.HHE. ML:2.0 0.0010155 0.46 AML other m 2021-12-10T18:21:56.53
IV.ESML.HNE. ML:2.0 0.0009665 0.46 AML other m 2021-12-10T18:21:56.53
IV.ESML.HHN. ML:1.7 0.000544 0.22 AML other m 2021-12-10T18:21:56.43
IV.ESML.HNN. ML:1.7 0.0005574999999999999 0.86 AML other m 2021-12-10T18:21:56.98
IV.EPOZ.HHN. ML:1.9 0.0007005000000000001 1.02 AML other m 2021-12-10T18:21:57.08
IV.ECTS.HHE. ML:1.7 0.000491 1.56 AML other m 2021-12-10T18:21:59.82
IV.ECTS.HHN. ML:1.7 0.0004595 0.38 AML other m 2021-12-10T18:21:59.45
IV.EFIU.HHE. ML:2.0 0.0009575 0.9 AML other m 2021-12-10T18:21:59.62
IV.EPOZ.HHE. ML:1.8 0.0006125000000000001 1.3 AML other m 2021-12-10T18:21:59.01
IV.EFIU.HHN. ML:2.0 0.0008560000000000001 0.52 AML other m 2021-12-10T18:21:59.51
IV.ESAL.HHE. ML:2.2 0.0022350000000000004 1.06 AML other m 2021-12-10T18:22:00.13
IV.AIO.HHE. ML:1.5 0.000158 0.84 AML other m 2021-12-10T18:22:02.51
IV.AIO.HHN. ML:1.8 0.0002715 0.76 AML other m 2021-12-10T18:22:02.58
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