Earthquake with magnitude of ML 0.8 on date 12-08-2020 and time 15:59:41 (Italy) in region 4 km NW Montespertoli (FI)

A magnitude ML 0.8 earthquake occured in region: 4 km NW Montespertoli (FI), on

  • 12-08-2020 13:59:41 (UTC)
  • 12-08-2020 15:59:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.67, 11.05 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
Montespertoli FI 4 13537 13537
Montelupo Fiorentino FI 7 14098 27635
Empoli FI 10 48109 75744
Capraia e Limite FI 10 7670 83414
Castelfiorentino FI 10 17504 100918
San Casciano in Val di Pesa FI 11 17062 117980
Lastra a Signa FI 12 20156 138136
Signa FI 13 19179 157315
Certaldo FI 14 16121 173436
Scandicci FI 14 50609 224045
San Miniato PI 16 27934 251979
Carmignano PO 16 14450 266429
Vinci FI 16 14604 281033
Poggio a Caiano PO 16 10007 291040
Tavarnelle Val di Pesa FI 16 7800 298840
Impruneta FI 17 14615 313455
Gambassi Terme FI 17 4870 318325
Cerreto Guidi FI 17 10870 329195
Montaione FI 17 3700 332895
Barberino Val d'Elsa FI 18 4386 337281
Campi Bisenzio FI 18 46166 383447
Firenze FI 20 382808 766255

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km SW of Scandicci (50609 inhabitants)
20 Km SW of Firenze (382808 inhabitants)
23 Km S of Prato (191150 inhabitants)
31 Km SE of Pistoia (90315 inhabitants)
46 Km NW of Siena (53903 inhabitants)
48 Km E of Lucca (89046 inhabitants)
52 Km E of Pisa (89158 inhabitants)
61 Km E of Livorno (159219 inhabitants)
68 Km E of Viareggio (62467 inhabitants)
71 Km W of Arezzo (99543 inhabitants)
83 Km E of Massa (69479 inhabitants)
89 Km SE of Carrara (63133 inhabitants)
93 Km SW of Imola (69797 inhabitants)
94 Km S of Bologna (386663 inhabitants)
95 Km SW of Faenza (58541 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
Reviewed
Rev100
ML 0.8 2020-08-12
13:59:41
43.67 11.05 10 2020-08-12
14:12:25
Sala Sismica INGV-Roma 81908111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-12 13:59:41 ± 0.18
Latitude 43.67 ± 0.01
Longitude 11.05 ± 0.02
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 81908111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1604
Semi-minor axis of confidence ellipse (meter) 455
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 1600
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 192
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.45506
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 81908111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-12 14:12:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2020-08-12T14:01:40.22 3.0 undecidable manual Sg 6.57 0
IV.MCT.HHZ. 2020-08-12T14:01:38.67 3.0 undecidable manual Pg 15.09 0
IV.SACR.HHZ. 2020-08-12T14:01:32.38 3.0 undecidable manual Sg 3.15 0
GU.CIRO.HHZ. 2020-08-12T14:01:28.53 3.0 undecidable manual Sg 11.79 0
IV.CAGR.HHZ. 2020-08-12T14:01:25.12 3.0 undecidable manual Pn -1.72 0
IV.SENA.HHZ. 2020-08-12T14:01:20.80 3.0 undecidable manual Sn -5.62 0
IT.FDS.HGZ. 2020-08-12T14:01:14.66 3.0 undecidable manual Sg 1.54 0
IV.AGLI.HHZ. 2020-08-12T14:01:12.27 3.0 undecidable manual Sg -0.82 0
OX.CIMO.HHZ. 2020-08-12T14:01:12.69 3.0 undecidable manual Sg 3.48 0
CR.STON.BHZ. 2020-08-12T14:01:05.38 3.0 undecidable manual Pn 1.74 0
IV.CMPR.HHZ. 2020-08-12T14:01:01.14 3.0 undecidable manual Pg 1.44 0
IV.MILN.HHZ. 2020-08-12T14:00:52.01 3.0 undecidable manual Sn -2.14 0
CH.BNALP.HHZ. 2020-08-12T14:00:49.40 3.0 negative manual Pg 4.13 0
IT.FDS.HGZ. 2020-08-12T14:00:35.88 3.0 undecidable manual Pg 0.12 0
GU.TRAV.HHZ. 2020-08-12T14:00:29.23 3.0 negative manual Pn -6.45 0
IV.EUCT.HNZ. 2020-08-12T14:00:20.79 3.0 negative manual Pg -1.98 0
IV.MMO1.EHZ. 2020-08-12T14:00:17.98 3.0 positive manual Pg -3.41 0
IV.SAP2.EHZ. 2020-08-12T14:00:12.95 3.0 positive manual Pn -8.02 0
TV.SF04.EHZ. 2020-08-12T14:00:11.91 3.0 undecidable manual S -9.99 0
IV.ASSB.HHZ. 2020-08-12T14:00:10.52 3.0 positive manual P -4.02 0
IV.SEI.HHZ. 2020-08-12T13:59:57.44 0.6 undecidable manual S 30 0.4407 50 0.19 46
GU.POPM.HHE. 2020-08-12T13:59:57.68 0.3 undecidable manual S 331 0.4263 50 0.85 59
IV.RINC.HHZ. 2020-08-12T13:59:57.95 0.6 undecidable manual S 62 0.4551 50 0.28 45
IV.MOCL.EHZ. 2020-08-12T13:59:54.43 0.6 undecidable manual S 16 0.3444 50 0.04 49
IV.RUFI.EHZ. 2020-08-12T13:59:54.99 0.3 undecidable manual S 64 0.3705 50 -0.18 71
IV.CSNT.HHZ. 2020-08-12T13:59:52.24 0.6 undecidable manual S 139 0.2653 50 0.18 49
IV.MPPT.EHZ. 2020-08-12T13:59:52.50 0.6 undecidable manual S 6 0.2851 50 -0.14 48
IV.RINC.HHZ. 2020-08-12T13:59:50.79 0.1 undecidable manual P 62 0.4551 50 -0.01 96
IV.SEI.HHZ. 2020-08-12T13:59:50.73 0.1 undecidable manual P 30 0.4407 50 0.18 93
IV.RUFI.EHZ. 2020-08-12T13:59:49.10 0.1 undecidable manual P 64 0.3705 50 -0.25 93
GU.POPM.HHE. 2020-08-12T13:59:49.41 0.1 undecidable manual P 331 0.4263 50 -0.9 72
IV.MOCL.EHZ. 2020-08-12T13:59:48.82 0.1 undecidable manual P 16 0.3444 50 -0.08 97
IV.CSNT.HHZ. 2020-08-12T13:59:47.82 0.1 undecidable manual P 139 0.2653 50 0.26 95
IV.MPPT.EHZ. 2020-08-12T13:59:47.87 0.1 undecidable manual P 6 0.2851 50 -0.02 99
IV.CRMI.HHZ. 2020-08-12T13:59:47.45 0.3 undecidable manual S 338 0.1322 123 -0.04 76
IV.CRMI.HHZ. 2020-08-12T13:59:44.99 0.1 undecidable manual P 338 0.1322 123 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHN. ML:0.4 2.4575035E-5 0.8 AML other m 2020-08-12T13:59:47.58
IV.CRMI.HNN. ML:0.7 5.010558E-5 2.5024 AML other m 2020-08-12T13:59:48.05
IV.CRMI.HNE. ML:0.7 5.291731E-5 0.6592 AML other m 2020-08-12T13:59:47.62
IV.CRMI.HHE. ML:0.3 2.102406E-5 0.4608 AML other m 2020-08-12T13:59:47.29
IV.CSNT.HHE. ML:0.3 1.1836205E-5 0.5824 AML other m 2020-08-12T13:59:52.92
IV.CSNT.HHN. ML:0.6 2.0809345E-5 2.2016 AML other m 2020-08-12T13:59:53.47
IV.MPPT.EHE. ML:1 4.8423175E-5 0.1408 AML other m 2020-08-12T13:59:52.87
IV.MPPT.EHN. ML:1 4.7374465E-5 0.16 AML other m 2020-08-12T13:59:52.82
IV.MOCL.EHE. ML:1.1 4.5193085E-5 0.5632 AML other m 2020-08-12T13:59:55.94
IV.MOCL.EHN. ML:0.8 2.418258E-5 0.9408 AML other m 2020-08-12T13:59:54.82
IV.RUFI.EHE. ML:1.2 5.28698E-5 5.3376 AML other m 2020-08-12T13:59:54.02
IV.RUFI.EHN. ML:0.8 2.1122261E-5 6.624 AML other m 2020-08-12T13:59:53.05
IV.SEI.HHN. ML:1.2 4.706265E-5 0.6208 AML other m 2020-08-12T13:59:58.33
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