Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 31-08-2020 and time 03:36:59 (Italy) in region 10 km W Zafferana Etnea (CT)

A magnitude ML 1.8 earthquake occured in region: 10 km W Zafferana Etnea (CT), on

  • 31-08-2020 01:36:59 (UTC)
  • 31-08-2020 03:36:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7170, 14.9900 at 8 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
Zafferana Etnea CT 10 9517 9517
Ragalna CT 11 3924 13441
Milo CT 11 1087 14528
Nicolosi CT 12 7463 21991
Pedara CT 13 14102 36093
Biancavilla CT 13 24007 60100
Trecastagni CT 14 10910 71010
Santa Venerina CT 14 8592 79602
Belpasso CT 14 28108 107710
Sant'Alfio CT 14 1582 109292
Santa Maria di Licodia CT 14 7641 116933
Adrano CT 15 36122 153055
Viagrande CT 15 8563 161618
Bronte CT 16 19172 180790
San Pietro Clarenza CT 16 7743 188533
Camporotondo Etneo CT 17 5023 193556
Maletto CT 17 3920 197476
Mascalucia CT 17 31958 229434
Aci Bonaccorsi CT 17 3524 232958
Aci Sant'Antonio CT 17 17984 250942
Tremestieri Etneo CT 17 20589 271531
Paternò CT 17 48228 319759
Giarre CT 17 27659 347418
San Giovanni la Punta CT 18 23060 370478
Aci Catena CT 18 29851 400329
Randazzo CT 18 10900 411229
Gravina di Catania CT 18 25838 437067
Mascali CT 19 14282 451349
Riposto CT 19 14838 466187
Sant'Agata li Battiati CT 19 9479 475666
Valverde CT 19 7840 483506
Acireale CT 19 52622 536128
Linguaglossa CT 20 5403 541531
Piedimonte Etneo CT 20 3963 545494
San Gregorio di Catania CT 20 11966 557460

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of Acireale (52622 inhabitants)
25 Km NW of Catania (314555 inhabitants)
72 Km SW of Reggio di Calabria (183035 inhabitants)
73 Km SW of Messina (238439 inhabitants)
78 Km NW of Siracusa (122291 inhabitants)
85 Km E of Caltanissetta (63360 inhabitants)
91 Km N of Ragusa (73313 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
97 Km NE of Gela (75827 inhabitants)
97 Km N of Modica (54633 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 2020-08-31
01:36:59		 37.7168 14.9898 8 2020-11-19
12:37:07		 Bollettino Sismico Italiano INGV 84740331
Reviewed
Rev200 		ML 1.6 2020-08-31
01:36:59		 37.721 14.988 5 2020-11-15
02:51:42		 Sala Operativa INGV_OE (Catania) 82484091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-31 01:36:59 ± 0.07
Latitude 37.7168 ± 0.0045
Longitude 14.9898 ± 0.0068
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84740331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 619
Semi-minor axis of confidence ellipse (meter) 33
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 98
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.56298
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 84740331
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-15 02:51:25

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations
Type of magnitude ML
Reference to an origin 82484091
Agency INGV
Autore Sala Operativa INGV_OE (Catania)
Time of creation (UTC) 2020-08-31 01:44:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2020-08-31T01:37:14.31 0.6 undecidable manual S 194 42.1245 50 0.21 46
IV.NOV.HHZ. 2020-08-31T01:37:13.51 0.6 undecidable manual S 20 36.8298 50 0.84 38
IV.SSY.HHZ. 2020-08-31T01:37:11.63 0.3 undecidable manual P 173 62.493 50 0.46 63
IV.MPNC.HHZ. 2020-08-31T01:37:10.46 0.3 undecidable manual P 34 57.2982 50 0.09 69
IV.HAGA.HHZ. 2020-08-31T01:37:08.87 0.3 undecidable manual P 163 50.1165 50 -0.39 65
IV.NOV.HHZ. 2020-08-31T01:37:07.25 0.3 undecidable manual P 20 36.8298 50 0.04 72
IV.GALF.HHZ. 2020-08-31T01:37:07.52 0.3 undecidable manual P 269 37.1295 50 0.25 69
IV.MUCR.HHZ. 2020-08-31T01:37:07.13 0.3 undecidable manual P 344 37.5291 50 -0.2 70
IV.HLNI.HHZ. 2020-08-31T01:37:07.17 0.3 undecidable manual P 194 42.1245 50 -0.87 56
IV.AIO.HHZ. 2020-08-31T01:37:06.77 0.3 undecidable manual P 37 35.3424 50 -0.22 70
IV.EPZF.HHZ. 2020-08-31T01:37:06.82 0.6 undecidable manual S 316 16.6722 116 0.62 43
IV.EVRN.HHZ. 2020-08-31T01:37:05.33 0.6 undecidable manual S 103 13.1757 122 0.19 49
IV.ESML.HHZ. 2020-08-31T01:37:05.83 0.6 undecidable manual S 222 14.6742 119 0.25 48
IV.EMSG.HHZ. 2020-08-31T01:37:05.37 0.6 undecidable manual S 343 12.0768 124 0.55 45
IV.ECTS.HHZ. 2020-08-31T01:37:04.15 0.1 undecidable manual P 32 21.6672 111 -0.24 95
IV.ENIC.HHZ. 2020-08-31T01:37:04.47 0.6 undecidable manual S 164 9.879 130 0.25 48
IV.EPOZ.HHZ. 2020-08-31T01:37:04.37 0.1 undecidable manual P 106 18.1707 114 0.62 86
IV.ESML.HHZ. 2020-08-31T01:37:03.23 0.1 undecidable manual P 222 14.6742 119 0.11 99
IV.EMCN.HHZ. 2020-08-31T01:37:03.83 0.6 undecidable manual S 25 9.0798 132 -0.18 49
IV.EPZF.HHZ. 2020-08-31T01:37:03.12 0.1 undecidable manual P 316 16.6722 116 -0.35 93
IV.EMCN.HHZ. 2020-08-31T01:37:02.05 0.3 undecidable manual P 25 9.0798 132 -0.16 74
IV.ESLN.HHZ. 2020-08-31T01:37:02.79 0.6 undecidable manual S 207 2.8971 160 0 51
IV.EMSG.HHZ. 2020-08-31T01:37:02.55 0.1 positive manual P 343 12.0768 124 -0.13 99
IV.EPIT.HHN. 2020-08-31T01:37:02.73 0.1 undecidable manual P 29 11.9769 124 0.06 100
IV.EVRN.HHZ. 2020-08-31T01:37:02.73 0.3 undecidable manual P 103 13.1757 122 -0.14 74
IV.ENIC.HHZ. 2020-08-31T01:37:02.25 0.1 undecidable manual P 164 9.879 130 -0.08 100
IV.ECBD.HHN. 2020-08-31T01:37:02.33 0.1 undecidable manual P 50 10.9779 127 -0.18 98
IV.ESLN.HHZ. 2020-08-31T01:37:01.27 0.1 positive manual P 207 2.8971 160 -0.24 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.EMSG.HHN. ML:2.0 0.0013700000000000001 0.42 AML other m 2020-08-31T01:37:05.30
IV.EVRN.HHE. ML:2.1 0.001345 0.16 AML other m 2020-08-31T01:37:05.43
IV.EMSG.HHE. ML:2.1 0.0016099999999999999 0.38 AML other m 2020-08-31T01:37:05.61
IV.ESML.HHE. ML:1.8 0.0006120000000000001 0.58 AML other m 2020-08-31T01:37:06.44
IV.EVRN.HHN. ML:2.2 0.001715 0.64 AML other m 2020-08-31T01:37:07.18
IV.ENIC.HHE. ML:2.0 0.00134 0.9 AML other m 2020-08-31T01:37:07.39
IV.ENIC.HNE. ML:2.0 0.001585 1.5 AML other m 2020-08-31T01:37:07.77
IV.EPZF.HHE. ML:1.8 0.0006374999999999999 0.3 AML other m 2020-08-31T01:37:07.71
IV.ESML.HHN. ML:2.1 0.00125 1.32 AML other m 2020-08-31T01:37:07.30
IV.ECTS.HHE. ML:1.5 0.00024349999999999998 1.2 AML other m 2020-08-31T01:37:08.77
IV.EPZF.HHN. ML:1.9 0.0007655000000000001 0.28 AML other m 2020-08-31T01:37:08.17
IV.ENIC.HHN. ML:1.9 0.0012105000000000002 0.94 AML other m 2020-08-31T01:37:08.71
IV.ENIC.HNN. ML:2.1 0.001715 1.44 AML other m 2020-08-31T01:37:08.00
IV.ECTS.HHN. ML:1.6 0.000266 0.76 AML other m 2020-08-31T01:37:09.60
IV.EPOZ.HNE. ML:2.0 0.000855 0.44 AML other m 2020-08-31T01:37:09.78
IV.EPOZ.HHE. ML:2.0 0.0009055 0.42 AML other m 2020-08-31T01:37:09.56
IV.EPOZ.HNN. ML:1.9 0.0006705 1.3 AML other m 2020-08-31T01:37:10.92
IV.EPOZ.HHN. ML:1.9 0.0007235000000000001 1.3 AML other m 2020-08-31T01:37:10.92
IV.NOV.HHN. ML:1.7 0.00019350000000000001 0.28 AML other m 2020-08-31T01:37:14.82
IV.AIO.HHN. ML:1.3 0.0000839 0.28 AML other m 2020-08-31T01:37:14.68
IV.NOV.HHE. ML:1.9 0.000292 0.62 AML other m 2020-08-31T01:37:15.01
IV.AIO.HHE. ML:1.2 0.000068 0.64 AML other m 2020-08-31T01:37:16.73
IV.GALF.HHN. ML:2.1 0.0005095 1.06 AML other m 2020-08-31T01:37:16.42
IV.HLNI.HHE. ML:1.1 0.0000423 0.84 AML other m 2020-08-31T01:37:16.07
IV.MUCR.HHN. ML:1.5 0.00011344999999999999 0.44 AML other m 2020-08-31T01:37:16.55
IV.GALF.HHE. ML:1.9 0.0002795 0.6 AML other m 2020-08-31T01:37:16.84
IV.HLNI.HHN. ML:1.2 0.00004835 0.9 AML other m 2020-08-31T01:37:17.01
IV.MPNC.HHE. ML:1.8 0.00014600000000000003 0.54 AML other m 2020-08-31T01:37:20.29
IV.MPNC.HHN. ML:1.8 0.00012725 0.44 AML other m 2020-08-31T01:37:20.31
IV.MUCR.HHE. ML:1.5 0.0001315 0.62 AML other m 2020-08-31T01:37:21.61
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