Earthquake with magnitude of ML 0.9 on date 11-04-2019 and time 04:23:52 (Italy) in region 5 km NW Firenzuola (FI)

A magnitude ML 0.9 earthquake occured in region: 5 km NW Firenzuola (FI), on

  • 11-04-2019 02:23:52 (UTC)
  • 11-04-2019 04:23:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.16, 11.35 at 22 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 5 4726 4726
Monghidoro BO 7 3749 8475
San Benedetto Val di Sambro BO 11 4315 12790
Loiano BO 13 4294 17084
Castel del Rio BO 14 1246 18330
Monzuno BO 14 6328 24658
Castiglione dei Pepoli BO 15 5648 30306
Palazzuolo sul Senio FI 17 1154 31460
Grizzana Morandi BO 19 3916 35376
Vernio PO 19 6060 41436
Monterenzio BO 19 6035 47471
Barberino di Mugello FI 20 10836 58307

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Imola (69797 inhabitants)
37 Km NE of Prato (191150 inhabitants)
37 Km S of Bologna (386663 inhabitants)
42 Km NE of Pistoia (90315 inhabitants)
44 Km N of Firenze (382808 inhabitants)
45 Km W of Faenza (58541 inhabitants)
46 Km N of Scandicci (50609 inhabitants)
56 Km W of Forlì (117913 inhabitants)
64 Km SE of Modena (184973 inhabitants)
72 Km W of Cesena (96758 inhabitants)
74 Km W of Ravenna (159116 inhabitants)
76 Km E of Lucca (89046 inhabitants)
78 Km S of Ferrara (133155 inhabitants)
78 Km SE of Carpi (70699 inhabitants)
83 Km SE of Reggio nell'Emilia (171345 inhabitants)
88 Km NW of Arezzo (99543 inhabitants)
90 Km NE of Pisa (89158 inhabitants)
93 Km E of Viareggio (62467 inhabitants)
93 Km N of Siena (53903 inhabitants)
97 Km E of Massa (69479 inhabitants)
98 Km W of Rimini (147750 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 2019-04-11
02:23:52
44.16 11.35 22 2019-04-11
02:34:34
Sala Sismica INGV-Roma 67449741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-04-11 02:23:52 ± 0.16
Latitude 44.16 ± 0.01
Longitude 11.35 ± 0.01
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 67449741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 879
Semi-minor axis of confidence ellipse (meter) 225
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 8
Circular confidence region, given by single value of horizontal uncertainty (meter) 880
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.10522
Epicentral distance of station farthest from the epicenter (degree) 0.32645
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 67449741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-04-11 02:34:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BRIS.HHZ. 2019-04-11T02:24:05.31 0.6 undecidable manual S 78 0.3085 115 0.25 46
IV.LMD.HHZ. 2019-04-11T02:24:03.92 0.6 undecidable manual S 107 0.2716 119 -0.17 48
IV.MOCL.EHZ. 2019-04-11T02:24:02.18 1.0 undecidable manual S 218 0.1943 130 -0.01 25
IV.FNVD.HHZ. 2019-04-11T02:24:01.17 1.0 undecidable manual S 273 0.1601 136 -0.28 24
IV.ZCCA.HHZ. 2019-04-11T02:24:00.21 0.6 undecidable manual P 306 0.3265 114 0.07 48
IV.SEI.HHZ. 2019-04-11T02:24:00.66 0.6 undecidable manual S 175 0.1052 149 0.21 49
IV.BRIS.HHZ. 2019-04-11T02:23:59.86 0.6 undecidable manual P 78 0.3085 115 0 49
IV.MTCR.EHZ. 2019-04-11T02:23:59.56 0.6 undecidable manual P 242 0.2788 118 0.15 48
IV.MOCL.EHZ. 2019-04-11T02:23:58.43 0.6 positive manual P 218 0.1943 130 0.22 48
IV.LMD.HHZ. 2019-04-11T02:23:58.97 1.0 undecidable manual P 107 0.2716 119 -0.33 23
IV.SEI.HHZ. 2019-04-11T02:23:57.06 0.1 positive manual P 175 0.1052 149 -0.14 100
IV.FNVD.HHZ. 2019-04-11T02:23:57.27 1.0 undecidable manual P 273 0.1601 136 -0.5 23
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.2 9.3103465E-5 0.28 AML other m 2019-04-11T02:24:01.07
IV.SEI.HHN. ML:1.1 8.6025155E-5 0.3008 AML other m 2019-04-11T02:24:02.29
IV.MOCL.EHE. ML:0.3 1.09425875E-5 0.2608 AML other m 2019-04-11T02:24:03.64
IV.MOCL.EHN. ML:0.3 1.094996325E-5 0.3408 AML other m 2019-04-11T02:24:01.84
IV.LMD.HHE. ML:0.1 6.942975E-6 0.28 AML other m 2019-04-11T02:24:04.47
IV.LMD.HHN. ML:0.4 9.171078E-6 0.7616 AML other m 2019-04-11T02:24:04.02
IV.BRIS.HNE. ML:1.2 5.5417763E-5 0.4512 AML other m 2019-04-11T02:24:05.61
IV.BRIS.HNN. ML:1.7 0.0001729724 0.9216 AML other m 2019-04-11T02:24:04.12
IV.BRIS.HHE. ML:0.9 2.4998715E-5 0.1808 AML other m 2019-04-11T02:24:05.60
IV.BRIS.HHN. ML:1.2 5.590929E-5 0.4 AML other m 2019-04-11T02:24:05.61
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