Earthquake with magnitude of ML 0.9 on date 23-04-2019 and time 13:49:28 (Italy) in region 7 km S Firenzuola (FI)

A magnitude ML 0.9 earthquake occured in region: 7 km S Firenzuola (FI), on

  • 23-04-2019 11:49:28 (UTC)
  • 23-04-2019 13:49:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.06, 11.37 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
Firenzuola FI 7 4726 4726
Scarperia e San Piero FI 11 12217 16943
Borgo San Lorenzo FI 12 18211 35154
Barberino di Mugello FI 12 10836 45990
Palazzuolo sul Senio FI 15 1154 47144
Vicchio FI 16 8044 55188
Vernio PO 17 6060 61248
Vaglia FI 18 5073 66321
Monghidoro BO 19 3749 70070
Marradi FI 19 3139 73209
Castiglione dei Pepoli BO 20 5648 78857

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Prato (191150 inhabitants)
33 Km N of Firenze (382808 inhabitants)
37 Km NE of Scandicci (50609 inhabitants)
39 Km E of Pistoia (90315 inhabitants)
43 Km SW of Imola (69797 inhabitants)
48 Km SW of Faenza (58541 inhabitants)
49 Km S of Bologna (386663 inhabitants)
57 Km W of Forlì (117913 inhabitants)
70 Km W of Cesena (96758 inhabitants)
74 Km E of Lucca (89046 inhabitants)
74 Km SE of Modena (184973 inhabitants)
77 Km SW of Ravenna (159116 inhabitants)
78 Km NW of Arezzo (99543 inhabitants)
82 Km N of Siena (53903 inhabitants)
87 Km E of Pisa (89158 inhabitants)
89 Km S of Ferrara (133155 inhabitants)
89 Km SE of Carpi (70699 inhabitants)
92 Km E of Viareggio (62467 inhabitants)
92 Km SE of Reggio nell'Emilia (171345 inhabitants)
95 Km W of Rimini (147750 inhabitants)
98 Km E of Massa (69479 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 0.9 2019-04-23
11:49:28
44.06 11.37 12 2019-04-23
12:06:20
Sala Sismica INGV-Roma 67889411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-23 11:49:28 ± 0.07
Latitude 44.06 ± 0.01
Longitude 11.37 ± 0.01
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 67889411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1180
Semi-minor axis of confidence ellipse (meter) 208
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3984
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 67889411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-04-23 12:06:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CPGN.EHZ. 2019-04-23T11:49:44.55 3.0 positive manual P 0.13 0
IV.MTCR.EHZ. 2019-04-23T11:49:38.58 0.3 undecidable manual S 264 0.268 92 -0.14 69
IV.ASQU.HHE. 2019-04-23T11:49:37.06 1.0 undecidable manual P 131 0.3984 91 0.49 21
IV.LMD.HHZ. 2019-04-23T11:49:37.73 0.1 undecidable manual S 85 0.241 93 -0.21 92
IV.MOCL.EHZ. 2019-04-23T11:49:34.99 0.1 undecidable manual S 249 0.1475 100 -0.2 93
IV.MTCR.EHZ. 2019-04-23T11:49:34.51 0.3 undecidable manual P 264 0.268 92 0.18 69
IV.FNVD.HHZ. 2019-04-23T11:49:33.42 0.3 undecidable manual P 301 0.2095 94 0.08 71
IV.LMD.HHZ. 2019-04-23T11:49:33.94 0.3 undecidable manual P 85 0.241 93 0.06 71
IV.MPPT.EHZ. 2019-04-23T11:49:33.58 0.3 undecidable manual P 244 0.2266 93 -0.05 71
IV.MOCL.EHZ. 2019-04-23T11:49:32.38 0.1 undecidable manual P 249 0.1475 100 0.09 96
IV.SEI.HHZ. 2019-04-23T11:49:32.36 0.1 undecidable manual S 246 0.0108 172 -0.01 100
IV.SEI.HHZ. 2019-04-23T11:49:30.73 0.1 undecidable manual P 246 0.0108 172 0.07 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHE. ML:1.2 0.000141 0.14 AML other m 2019-04-23T11:49:35.17
IV.MOCL.EHN. ML:1.2 0.00014 0.18 AML other m 2019-04-23T11:49:35.50
IV.SEI.HHE. ML:0.9 0.00011894647 0.2368 AML other m 2019-04-23T11:49:33.80
IV.SEI.HHN. ML:1.1 0.00019095315 0.3008 AML other m 2019-04-23T11:49:33.97
IV.MPPT.EHE. ML:0.8 4.002124E-5 1.8432 AML other m 2019-04-23T11:49:38.34
IV.MPPT.EHN. ML:0.6 2.440463E-5 2.3232 AML other m 2019-04-23T11:49:38.65
IV.LMD.HHE. ML:0.6 2.066758E-5 0.1344 AML other m 2019-04-23T11:49:37.00
IV.LMD.HHN. ML:0.8 2.9761975E-5 1.6832 AML other m 2019-04-23T11:49:38.22
IV.MTCR.EHE. ML:1 4.63732598E-5 1.5808 AML other m 2019-04-23T11:49:38.68
IV.MTCR.EHN. ML:0.9 4.012373E-5 1.5424 AML other m 2019-04-23T11:49:39.51
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