Earthquake with magnitude of ML 1.6 on date 23-08-2019 and time 18:22:47 (Italy) in region 3 km SE Montelupo Fiorentino (FI)

A magnitude ML 1.6 earthquake occured in region: 3 km SE Montelupo Fiorentino (FI), on

  • 23-08-2019 16:22:47 (UTC)
  • 23-08-2019 18:22:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.7, 11.04 at 12 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
Montelupo Fiorentino FI 3 14098 14098
Capraia e Limite FI 7 7670 21768
Montespertoli FI 7 13537 35305
Empoli FI 7 48109 83414
Lastra a Signa FI 9 20156 103570
Signa FI 10 19179 122749
Castelfiorentino FI 12 17504 140253
Carmignano PO 12 14450 154703
Poggio a Caiano PO 13 10007 164710
Vinci FI 13 14604 179314
San Casciano in Val di Pesa FI 13 17062 196376
Scandicci FI 13 50609 246985
Cerreto Guidi FI 14 10870 257855
San Miniato PI 15 27934 285789
Campi Bisenzio FI 15 46166 331955
Quarrata PT 17 26190 358145
Lamporecchio PT 17 7508 365653
Certaldo FI 17 16121 381774
Impruneta FI 18 14615 396389
Fucecchio FI 18 23618 420007
Larciano PT 19 6394 426401
Firenze FI 19 382808 809209
Tavarnelle Val di Pesa FI 19 7800 817009
Sesto Fiorentino FI 19 48958 865967
Gambassi Terme FI 19 4870 870837
Montaione FI 20 3700 874537

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Scandicci (50609 inhabitants)
19 Km W of Firenze (382808 inhabitants)
20 Km S of Prato (191150 inhabitants)
27 Km SE of Pistoia (90315 inhabitants)
46 Km E of Lucca (89046 inhabitants)
49 Km NW of Siena (53903 inhabitants)
51 Km E of Pisa (89158 inhabitants)
61 Km E of Livorno (159219 inhabitants)
66 Km E of Viareggio (62467 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
81 Km E of Massa (69479 inhabitants)
86 Km E of Carrara (63133 inhabitants)
90 Km SW of Imola (69797 inhabitants)
91 Km S of Bologna (386663 inhabitants)
94 Km SW of Faenza (58541 inhabitants)
99 Km SW of Forlì (117913 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 1.6 2019-08-23
16:22:47
43.7 11.04 12 2019-08-23
16:29:24
Sala Sismica INGV-Roma 71749671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-23 16:22:47 ± 0.11
Latitude 43.70 ± 0.01
Longitude 11.04 ± 0.01
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71749671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 941
Semi-minor axis of confidence ellipse (meter) 246
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 940
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.86964
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 71749671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-23 16:29:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PARC.HHZ. 2019-08-23T16:23:16.26 0.1 undecidable manual S 93 0.8696 91 0.87 76
IV.ATCC.EHZ. 2019-08-23T16:23:14.49 3.0 undecidable manual P 3.23 0
IV.NDIM.HHZ. 2019-08-23T16:23:11.33 3.0 positive manual P 1.18 0
TV.SF04.EHZ. 2019-08-23T16:23:06.11 3.0 negative manual P -0.54 0
IV.FROS.CHZ. 2019-08-23T16:23:04.01 0.1 undecidable manual S 170 0.5009 91 -0.46 87
IV.PARC.HHZ. 2019-08-23T16:23:04.53 0.1 undecidable manual P 93 0.8696 91 1.07 66
GU.POPM.HHZ. 2019-08-23T16:23:01.42 0.1 undecidable manual S 329 0.3966 91 0.05 93
IV.RUFI.EHZ. 2019-08-23T16:23:00.25 0.1 undecidable manual S 68 0.366 92 -0.22 86
GU.CARD.HHZ. 2019-08-23T16:22:59.36 3.0 positive manual P 1.13 0
IV.CSNT.HHZ. 2019-08-23T16:22:58.11 0.1 undecidable manual S 141 0.2941 92 -0.23 92
IV.FROS.CHZ. 2019-08-23T16:22:57.52 0.1 positive manual P 170 0.5009 91 0.37 86
IV.MPPT.EHZ. 2019-08-23T16:22:57.06 0.1 undecidable manual S 8 0.2563 93 -0.16 93
IV.OSSC.HHZ. 2019-08-23T16:22:56.45 0.1 undecidable manual S 140 0.2347 94 -0.13 95
IV.BDI.HHZ. 2019-08-23T16:22:56.58 0.1 undecidable manual P 319 0.4793 91 -0.21 94
IV.RUFI.EHZ. 2019-08-23T16:22:55.05 0.1 undecidable manual P 68 0.366 92 0.21 96
GU.POPM.HHZ. 2019-08-23T16:22:55.25 0.1 undecidable manual P 329 0.3966 91 -0.11 96
IV.CSNT.HHZ. 2019-08-23T16:22:53.49 0.1 undecidable manual P 141 0.2941 92 -0.12 95
IV.MOCL.EHZ. 2019-08-23T16:22:53.99 0.1 undecidable manual P 19 0.3184 92 -0.04 95
IV.OSSC.HHZ. 2019-08-23T16:22:52.63 0.1 negative manual P 140 0.2347 94 0.03 99
IV.MPPT.EHZ. 2019-08-23T16:22:52.97 0.1 positive manual P 8 0.2563 93 0 98
IV.CRMI.HHZ. 2019-08-23T16:22:52.34 0.1 undecidable manual S 335 0.1007 120 -0.38 97
IV.CRMI.HHZ. 2019-08-23T16:22:50.36 0.1 undecidable manual P 335 0.1007 120 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHE. ML:1.2 0.0001515 0.26 AML other m 2019-08-23T16:22:52.59
IV.CRMI.HHN. ML:1.2 0.000181 0.52 AML other m 2019-08-23T16:22:52.54
IV.MPPT.EHN. ML:1.5 0.0001665 0.12 AML other m 2019-08-23T16:22:53.28
IV.OSSC.HHE. ML:1.7 0.000298 0.5 AML other m 2019-08-23T16:22:56.86
IV.OSSC.HNN. ML:1.7 0.0002875 1.16 AML other m 2019-08-23T16:22:56.87
IV.MPPT.EHE. ML:1.4 0.000135 0.58 AML other m 2019-08-23T16:22:57.23
IV.OSSC.HNE. ML:1.7 0.0002915 0.76 AML other m 2019-08-23T16:22:57.59
IV.OSSC.HHN. ML:1.6 0.0002275 0.76 AML other m 2019-08-23T16:22:57.59
IV.CSNT.HHN. ML:1.6 0.0001675 0.54 AML other m 2019-08-23T16:22:59.63
IV.CSNT.HHE. ML:1.5 0.000137 0.8 AML other m 2019-08-23T16:23:00.56
IV.MOCL.EHE. ML:1.3 7.51E-5 1.24 AML other m 2019-08-23T16:23:01.97
IV.MOCL.EHN. ML:1.3 8.74E-5 0.44 AML other m 2019-08-23T16:23:02.40
GU.POPM.HHE. ML:1.8 0.0001965 0.2 AML other m 2019-08-23T16:23:02.61
GU.POPM.HHN. ML:1.8 0.0001845 0.72 AML other m 2019-08-23T16:23:02.28
IV.FROS.CHE. ML:2 0.000255 0.16 AML other m 2019-08-23T16:23:04.39
IV.FROS.CHN. ML:1.8 0.0001285 0.76 AML other m 2019-08-23T16:23:05.61
GU.CARD.HHN. ML:1.6 8.92E-5 1.18 AML other m 2019-08-23T16:23:06.03
IV.BDI.HHE. ML:1.7 0.0001256 1.54 AML other m 2019-08-23T16:23:08.78
GU.CARD.HHE. ML:1.5 6.825E-5 0.36 AML other m 2019-08-23T16:23:09.02
IV.NDIM.HHN. ML:3.1 0.000868 0.08 AML other m 2019-08-23T16:23:14.78
IV.NDIM.HNN. ML:3.2 0.000901 0.08 AML other m 2019-08-23T16:23:15.26
IV.NDIM.HNE. ML:3.3 0.00136 0.42 AML other m 2019-08-23T16:23:16.08
IV.NDIM.HHE. ML:3.3 0.001375 0.42 AML other m 2019-08-23T16:23:16.30
IV.PARC.HHN. ML:1.3 2.125E-5 0.54 AML other m 2019-08-23T16:23:16.29
IV.BDI.HHN. ML:1.7 0.0001181 0.6 AML other m 2019-08-23T16:23:20.68
IV.PARC.HHE. ML:1.3 2.135E-5 1.52 AML other m 2019-08-23T16:23:23.08
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