Earthquake with magnitude of ML 0.9 on date 26-01-2021 and time 09:22:26 (UTC) in region 1 km E Campi Bisenzio (FI)

A magnitude ML 0.9 earthquake occured in region: 1 km E Campi Bisenzio (FI), on

  • 26-01-2021 09:22:26 (UTC)
  • 26-01-2021 10:22:26 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.82, 11.16 at 10 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
Campi Bisenzio FI 2 46166 46166
Sesto Fiorentino FI 4 48958 95124
Calenzano FI 5 17489 112613
Signa FI 7 19179 131792
Lastra a Signa FI 7 20156 151948
Scandicci FI 7 50609 202557
Prato PO 8 191150 393707
Poggio a Caiano PO 8 10007 403714
Firenze FI 10 382808 786522
Fiesole FI 11 13969 800491
Carmignano PO 11 14450 814941
Vaglia FI 14 5073 820014
Quarrata PT 15 26190 846204
Montelupo Fiorentino FI 15 14098 860302
Agliana PT 15 17525 877827
Montemurlo PO 15 18456 896283
Bagno a Ripoli FI 15 25611 921894
Montale PT 17 10737 932631
Vaiano PO 17 9895 942526
Capraia e Limite FI 17 7670 950196
Impruneta FI 17 14615 964811
San Casciano in Val di Pesa FI 19 17062 981873
Vinci FI 19 14604 996477

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Scandicci (50609 inhabitants)
8 Km SE of Prato (191150 inhabitants)
10 Km NW of Firenze (382808 inhabitants)
23 Km SE of Pistoia (90315 inhabitants)
53 Km E of Lucca (89046 inhabitants)
58 Km N of Siena (53903 inhabitants)
62 Km E of Pisa (89158 inhabitants)
71 Km NW of Arezzo (99543 inhabitants)
73 Km E of Viareggio (62467 inhabitants)
74 Km SW of Imola (69797 inhabitants)
75 Km E of Livorno (159219 inhabitants)
76 Km S of Bologna (386663 inhabitants)
78 Km SW of Faenza (58541 inhabitants)
84 Km SW of Forlì (117913 inhabitants)
85 Km E of Massa (69479 inhabitants)
89 Km E of Carrara (63133 inhabitants)
93 Km S of Modena (184973 inhabitants)
94 Km W of Cesena (96758 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 2021-01-26
09:22:26
43.82 11.16 10 2021-01-26
09:40:05
Sala Sismica INGV-Roma 86592121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-26 09:22:26 ± 0.16
Latitude 43.82 ± 0.01
Longitude 11.16 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86592121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1031
Semi-minor axis of confidence ellipse (meter) 628
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 1030
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.09982
Epicentral distance of station farthest from the epicenter (degree) 0.46945
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 86592121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-26 09:40:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RINC.HHZ. 2021-01-26T09:22:38.88 0.6 undecidable manual S 79 0.3301 50 0.2 61
IV.SEI.HHZ. 2021-01-26T09:22:36.88 0.3 undecidable manual S 32 0.2725 50 -0.09 95
IV.BDI.HHN. 2021-01-26T09:22:35.70 1.0 undecidable manual P 301 0.4694 50 -0.08 31
IV.RUFI.EHZ. 2021-01-26T09:22:35.88 0.6 undecidable manual S 87 0.2545 50 -0.55 57
IV.MOCL.EHN. 2021-01-26T09:22:34.28 0.6 undecidable manual S 5 0.1826 116 0.25 63
IV.CSNT.HHZ. 2021-01-26T09:22:34.00 1.0 undecidable manual P 165 0.3624 50 0.05 32
IV.RINC.HHZ. 2021-01-26T09:22:33.83 0.6 undecidable manual P 79 0.3301 50 0.43 59
IV.RUFI.EHZ. 2021-01-26T09:22:32.06 0.6 undecidable manual P 87 0.2545 50 -0.04 64
IV.SEI.HHZ. 2021-01-26T09:22:32.68 0.6 undecidable manual P 32 0.2725 50 0.27 61
IV.MPPT.EHZ. 2021-01-26T09:22:32.56 0.3 undecidable manual S 340 0.143 122 -0.13 97
IV.MOCL.EHN. 2021-01-26T09:22:30.26 1.0 undecidable manual P 5 0.1826 116 -0.45 30
IV.MPPT.EHZ. 2021-01-26T09:22:29.96 0.3 negative manual P 340 0.143 122 0.02 99
IT.FIE.HGZ. 2021-01-26T09:22:29.17 0.3 undecidable manual P 99 0.0998 132 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MPPT.EHE. ML:0.8 6.5953495E-5 0.4608 AML other m 2021-01-26T09:22:33.19
IV.MPPT.EHN. ML:0.7 4.9259395E-5 0.4032 AML other m 2021-01-26T09:22:34.64
IV.CSNT.HHE. ML:0.6 1.472882E-5 0.8 AML other m 2021-01-26T09:22:48.78
IV.CSNT.HHN. ML:0.8 1.7750415E-5 0.4992 AML other m 2021-01-26T09:22:42.55
IV.RUFI.EHE. ML:1.1 5.7524185E-5 0.256 AML other m 2021-01-26T09:22:36.22
IV.RUFI.EHN. ML:1.2 7.4593095E-5 0.2624 AML other m 2021-01-26T09:22:36.24
IV.SEI.HHE. ML:1 5.010772E-5 0.1152 AML other m 2021-01-26T09:22:37.46
IV.SEI.HHN. ML:1.2 7.6914195E-5 0.2432 AML other m 2021-01-26T09:22:38.29
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