Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 17-10-2020 and time 12:13:59 (Italy) in region 6 km SE San Godenzo (FI)

A magnitude ML 1.1 earthquake occured in region: 6 km SE San Godenzo (FI), on

  • 17-10-2020 10:13:59 (UTC)
  • 17-10-2020 12:13:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8830, 11.6710 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
San Godenzo FI 6 1167 1167
Londa FI 9 1840 3007
Pratovecchio Stia AR 11 5845 8852
Dicomano FI 12 5515 14367
Premilcuore FC 14 799 15166
Rufina FI 16 7346 22512
Castel San Niccolò AR 16 2707 25219
Montemignaio AR 16 566 25785
Vicchio FI 17 8044 33829
Pelago FI 18 7660 41489
Portico e San Benedetto FC 18 756 42245
Poppi AR 19 6160 48405

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Firenze (382808 inhabitants)
42 Km E of Scandicci (50609 inhabitants)
46 Km E of Prato (191150 inhabitants)
48 Km SW of Faenza (58541 inhabitants)
48 Km SW of Forlì (117913 inhabitants)
49 Km NW of Arezzo (99543 inhabitants)
53 Km S of Imola (69797 inhabitants)
54 Km SW of Cesena (96758 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
68 Km NE of Siena (53903 inhabitants)
73 Km SE of Bologna (386663 inhabitants)
73 Km SW of Ravenna (159116 inhabitants)
74 Km W of Rimini (147750 inhabitants)
94 Km E of Lucca (89046 inhabitants)
100 Km W of Pesaro (94582 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
Reviewed
Rev100 		ML 1.1 2020-10-17
10:13:59		 43.883 11.6712 9 2020-10-17
10:19:33		 Sala Sismica INGV-Roma 83845491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-17 10:13:59 ± 0.09
Latitude 43.8830 ± 0.0072
Longitude 11.6712 ± 0.0050
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83845491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 806
Semi-minor axis of confidence ellipse (meter) 249
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 810.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42448
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 83845491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 10:19:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.NARO.HHZ. 2020-10-17T10:14:15.47 3.0 negative manual P 1.79 0
IV.MPPT.EHZ. 2020-10-17T10:14:14.60 0.3 undecidable manual S 280 47.1195 50 -0.11 69
IV.VISG.HHZ. 2020-10-17T10:14:12.55 3.0 undecidable manual S 0
IV.VISG.HHZ. 2020-10-17T10:14:09.40 3.0 undecidable manual P 0
IV.MPPT.EHZ. 2020-10-17T10:14:08.13 0.1 undecidable manual P 280 47.1195 50 -0.03 93
IV.RONT.HHZ. 2020-10-17T10:14:08.17 0.6 undecidable manual S 303 22.6551 112 0.51 44
IV.ASQU.HHZ. 2020-10-17T10:14:04.93 0.6 undecidable manual S 135 13.4754 124 0.11 48
IV.RUFI.EHZ. 2020-10-17T10:14:04.84 0.6 undecidable manual S 249 13.875 123 -0.1 49
IV.RONT.HHZ. 2020-10-17T10:14:04.06 0.1 undecidable manual P 303 22.6551 112 -0.03 97
IV.SFI.EHZ. 2020-10-17T10:14:04.78 0.6 undecidable manual S 80 14.2746 122 -0.27 47
IV.RUFI.EHZ. 2020-10-17T10:14:02.55 1.0 undecidable manual P 249 13.875 123 0.03 25
IV.SFI.EHZ. 2020-10-17T10:14:02.61 0.3 positive manual P 80 14.2746 122 0.03 74
IV.RINC.HHZ. 2020-10-17T10:14:02.46 0.6 undecidable manual S 274 5.1948 150 -0.34 47
IV.ASQU.HHZ. 2020-10-17T10:14:02.66 0.3 positive manual P 135 13.4754 124 0.21 71
IV.RINC.HHZ. 2020-10-17T10:14:01.31 0.1 negative manual P 274 5.1948 150 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RINC.HHE. ML:1.6 0.0006815 0.32 AML other m 2020-10-17T10:14:02.56
IV.RINC.HHN. ML:1.4 0.000438 0.3 AML other m 2020-10-17T10:14:02.64
IV.ASQU.HHE. ML:0.9 0.00008345 0.18 AML other m 2020-10-17T10:14:05.14
IV.SFI.EHE. ML:1.0 0.00009504999999999999 0.26 AML other m 2020-10-17T10:14:05.17
IV.SFI.EHN. ML:1.3 0.000192 0.26 AML other m 2020-10-17T10:14:05.07
IV.ASQU.HHN. ML:0.6 0.00004655 0.66 AML other m 2020-10-17T10:14:05.15
IV.RONT.HHN. ML:1.5 0.0002125 0.12 AML other m 2020-10-17T10:14:08.71
IV.RONT.HHE. ML:1.5 0.0002275 0.38 AML other m 2020-10-17T10:14:09.28
IV.RUFI.EHE. ML:1.0 0.000111773465 0.1024 AML other m 2020-10-17T10:14:04.89
IV.RUFI.EHN. ML:0.7 0.000049191159999999995 0.1216 AML other m 2020-10-17T10:14:05.13
IV.MPPT.EHE. ML:0.7 0.000012578840000000002 0.2368 AML other m 2020-10-17T10:14:15.50
IV.MPPT.EHN. ML:1.0 0.000025927005 0.2368 AML other m 2020-10-17T10:14:15.65
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