Earthquake with magnitude of ML 0.9 on date 26-10-2021 and time 16:43:11 (UTC) in region 5 km W San Godenzo (FI)

A magnitude ML 0.9 earthquake occured in region: 5 km W San Godenzo (FI), on

  • 26-10-2021 16:43:11 (UTC)
  • 26-10-2021 18:43:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.937, 11.563 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 5 1167 1167
Dicomano FI 6 5515 6682
Vicchio FI 8 8044 14726
Londa FI 8 1840 16566
Rufina FI 14 7346 23912
Borgo San Lorenzo FI 14 18211 42123
Marradi FI 16 3139 45262
Premilcuore FC 18 799 46061
Pelago FI 19 7660 53721
Scarperia e San Piero FI 19 12217 65938
Palazzuolo sul Senio FI 20 1154 67092

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NE of Firenze (382808 inhabitants)
36 Km NE of Scandicci (50609 inhabitants)
38 Km E of Prato (191150 inhabitants)
47 Km SW of Faenza (58541 inhabitants)
48 Km S of Imola (69797 inhabitants)
50 Km SW of Forlì (117913 inhabitants)
52 Km E of Pistoia (90315 inhabitants)
58 Km NW of Arezzo (99543 inhabitants)
59 Km W of Cesena (96758 inhabitants)
65 Km S of Bologna (386663 inhabitants)
71 Km N of Siena (53903 inhabitants)
74 Km SW of Ravenna (159116 inhabitants)
82 Km W of Rimini (147750 inhabitants)
86 Km E of Lucca (89046 inhabitants)
94 Km SE of Modena (184973 inhabitants)
96 Km E of Pisa (89158 inhabitants)
100 Km S of Ferrara (133155 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Reviewed
Rev100
ML 0.9 2021-10-26
16:43:11
43.9367 11.5627 9 2021-10-26
17:25:09
Sala Sismica INGV-Roma 97006691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-26 16:43:11 ± 0.08
Latitude 43.9367 ± 0.0054
Longitude 11.5627 ± 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 97006691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 614
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 20
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.47214
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 97006691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-26 17:25:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CARD.HHZ. 2021-10-26T16:43:47.59 3.0 undecidable manual Sg 10.16 0
IV.IMOL.HNZ. 2021-10-26T16:43:39.84 3.0 undecidable manual Sg 11.81 0
IV.FIU.EHZ. 2021-10-26T16:43:34.96 3.0 undecidable manual Sn -1.2 0
IV.OSSC.HHZ. 2021-10-26T16:43:28.85 1.0 undecidable manual S 209 0.4721 50 0.07 24
GU.BURY.HHZ. 2021-10-26T16:43:25.45 3.0 undecidable manual Pg 15.42 0
IV.OSSC.HHZ. 2021-10-26T16:43:21.62 0.1 undecidable manual P 209 0.4721 50 -0.02 95
IV.ASQU.HHZ. 2021-10-26T16:43:20.64 0.6 undecidable manual S 131 0.2149 111 -0.11 49
IV.SFI.EHZ. 2021-10-26T16:43:20.53 1.0 undecidable manual S 99 0.2068 112 0.06 25
IV.SEI.HHZ. 2021-10-26T16:43:19.84 0.1 undecidable manual S 309 0.188 114 0.05 100
IV.BOSL.HHZ. 2021-10-26T16:43:17.92 0.3 undecidable manual S 268 0.1358 121 -0.07 75
IV.SEI.HHZ. 2021-10-26T16:43:16.23 0.1 undecidable manual P 309 0.188 114 -0.22 97
IV.ASQU.HHZ. 2021-10-26T16:43:16.93 0.1 undecidable manual P 131 0.2149 111 -0.08 99
IV.SFI.EHZ. 2021-10-26T16:43:16.97 0.1 undecidable manual P 99 0.2068 112 0.13 98
IV.BOSL.HHZ. 2021-10-26T16:43:15.64 0.1 undecidable manual P 268 0.1358 121 0.23 97
CR.ZAG.BHZ. 2021-10-26T16:43:05.00 3.0 undecidable manual Pg 11.94 0
AC.VLO.HHZ. 2021-10-26T16:42:41.68 3.0 undecidable manual Pn 1.69 0
IV.VISG.HHZ. 2021-10-26T16:42:38.02 3.0 undecidable manual Pn -3.5 0
IV.IMOL.HNZ. 2021-10-26T16:42:36.31 3.0 positive manual Pn -5.12 0
IV.ILOS.HHZ. 2021-10-26T16:42:33.50 3.0 negative manual Pg 5.45 0
IV.FIAM.HHZ. 2021-10-26T16:42:32.60 3.0 undecidable manual S -1.12 0
IV.RMP.HHZ. 2021-10-26T16:42:29.31 3.0 undecidable manual Sn -5.62 0
IX.SCL3.EHZ.02 2021-10-26T16:41:57.07 3.0 undecidable manual P -1.93 0
IT.PLTA.HNZ. 2021-10-26T16:41:52.35 3.0 undecidable manual P -3.02 0
IV.RNI2.HHZ. 2021-10-26T16:41:52.84 3.0 positive manual P -2.58 0
IV.BIOG.HHZ. 2021-10-26T16:41:47.03 3.0 negative manual P -1.35 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BOSL.HHE. ML:0.4 2.5E-5 0.4 AML other m 2021-10-26T16:43:18.19
IV.BOSL.HHN. ML:0.5 2.925E-5 0.3 AML other m 2021-10-26T16:43:20.40
IV.ASQU.HHE. ML:1.3 0.0001245 0.22 AML other m 2021-10-26T16:43:20.93
IV.ASQU.HHN. ML:1.3 0.0001315 0.22 AML other m 2021-10-26T16:43:20.95
IV.SFI.EHN. ML:1 5.965E-5 0.32 AML other m 2021-10-26T16:43:21.06
IV.SFI.EHE. ML:0.9 4.805E-5 0.48 AML other m 2021-10-26T16:43:21.03
IV.SEI.HHE. ML:1.1 8.895E-5 1.72 AML other m 2021-10-26T16:43:22.02
IV.VISG.HHE. ML:0.6 2.145E-5 1.42 AML other m 2021-10-26T16:43:22.92
IV.SEI.HHN. ML:1.1 0.000101 0.36 AML other m 2021-10-26T16:43:23.49
IV.VISG.HHN. ML:0.6 1.92E-5 1.76 AML other m 2021-10-26T16:43:23.92
AC.VLO.HHE. ML:0 0.000719 0.06 AML other m 2021-10-26T16:43:45.85
AC.VLO.HHN. ML:0 0.001255 0.06 AML other m 2021-10-26T16:43:45.91
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