Earthquake with magnitude of ML 1.1 on date 09-09-2018 and time 06:05:08 (Italy) in region 3 km NW San Godenzo (FI)

A magnitude ML 1.1 earthquake occured in region: 3 km NW San Godenzo (FI), on

  • 09-09-2018 04:05:08 (UTC)
  • 09-09-2018 06:05:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.95, 11.6 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.

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 3 1167 1167
Dicomano FI 9 5515 6682
Londa FI 11 1840 8522
Vicchio FI 11 8044 16566
Marradi FI 14 3139 19705
Premilcuore FC 14 799 20504
Portico e San Benedetto FC 16 756 21260
Rufina FI 17 7346 28606
Borgo San Lorenzo FI 17 18211 46817
Tredozio FC 18 1212 48029
Palazzuolo sul Senio FI 18 1154 49183

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NE of Firenze (382808 inhabitants)
40 Km NE of Scandicci (50609 inhabitants)
41 Km E of Prato (191150 inhabitants)
43 Km SW of Faenza (58541 inhabitants)
45 Km S of Imola (69797 inhabitants)
46 Km SW of Forlì (117913 inhabitants)
55 Km W of Cesena (96758 inhabitants)
55 Km E of Pistoia (90315 inhabitants)
59 Km NW of Arezzo (99543 inhabitants)
64 Km SE of Bologna (386663 inhabitants)
70 Km SW of Ravenna (159116 inhabitants)
74 Km NE of Siena (53903 inhabitants)
78 Km W of Rimini (147750 inhabitants)
89 Km E of Lucca (89046 inhabitants)
94 Km SE of Modena (184973 inhabitants)
98 Km S of Ferrara (133155 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.1 2018-09-09
04:05:08
43.95 11.6 9 2018-09-09
04:09:52
Sala Sismica INGV-Roma 60728891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-09 04:05:08 ± 0.05
Latitude 43.95 ± 0.00
Longitude 11.60 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 60728891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 238
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 55
Circular confidence region, given by single value of horizontal uncertainty (meter) 240
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.134
Epicentral distance of station farthest from the epicenter (degree) 0.41818
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 60728891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-09 04:09:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRE.HHZ. 2018-09-09T04:05:23.83 0.3 undecidable manual S 143 0.4182 50 0.14 70
IV.CRE.HHZ. 2018-09-09T04:05:17.05 0.3 negative manual P 143 0.4182 50 -0.16 69
IV.ASQU.HHZ. 2018-09-09T04:05:16.75 0.1 undecidable manual S 140 0.2059 111 -0.1 98
IV.SEI.HHZ. 2018-09-09T04:05:16.71 0.1 undecidable manual S 300 0.2032 111 -0.07 98
IV.RUFI.EHZ. 2018-09-09T04:05:14.42 0.1 undecidable manual S 211 0.134 121 0.04 100
IV.LMD.HHZ. 2018-09-09T04:05:14.75 0.1 undecidable manual S 31 0.1439 119 0.06 100
IV.SEI.HHZ. 2018-09-09T04:05:13.17 0.3 negative manual P 300 0.2032 111 -0.05 74
IV.ASQU.HHZ. 2018-09-09T04:05:13.23 0.1 positive manual P 140 0.2059 111 -0.03 99
IV.LMD.HHZ. 2018-09-09T04:05:12.09 0.6 positive manual P 31 0.1439 119 0.07 50
IV.RUFI.EHZ. 2018-09-09T04:05:11.95 0.1 positive manual P 211 0.134 121 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0.9 8.085E-5 0.52 AML other m 2018-09-09T04:05:15.00
IV.LMD.HHN. ML:1.1 0.000121 0.28 AML other m 2018-09-09T04:05:15.26
IV.ASQU.HHE. ML:1.2 0.00010145 0.16 AML other m 2018-09-09T04:05:16.84
IV.ASQU.HHN. ML:1.2 0.00011 1.74 AML other m 2018-09-09T04:05:16.02
IV.SEI.HHE. ML:1.2 9.83E-5 1.28 AML other m 2018-09-09T04:05:16.99
IV.SEI.HHN. ML:1.4 0.000148 0.14 AML other m 2018-09-09T04:05:17.16
IV.CRE.HHN. ML:1.2 4.315E-5 0.36 AML other m 2018-09-09T04:05:24.20
IV.CRE.HHE. ML:0.9 2.4E-5 0.72 AML other m 2018-09-09T04:05:24.58
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download