Earthquake with magnitude of ML 1.3 on date 20-03-2020 and time 10:44:01 (Italy) in region 3 km W Firenzuola (FI)

A magnitude ML 1.3 earthquake occured in region: 3 km W Firenzuola (FI), on

  • 20-03-2020 09:44:01 (UTC)
  • 20-03-2020 10:44:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.13, 11.35 at 14 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 3 4726 4726
Monghidoro BO 11 3749 8475
San Benedetto Val di Sambro BO 14 4315 12790
Castiglione dei Pepoli BO 15 5648 18438
Castel del Rio BO 16 1246 19684
Palazzuolo sul Senio FI 16 1154 20838
Barberino di Mugello FI 16 10836 31674
Loiano BO 16 4294 35968
Vernio PO 17 6060 42028
Monzuno BO 18 6328 48356
Scarperia e San Piero FI 18 12217 60573
Borgo San Lorenzo FI 19 18211 78784

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Prato (191150 inhabitants)
39 Km SW of Imola (69797 inhabitants)
40 Km N of Firenze (382808 inhabitants)
40 Km NE of Pistoia (90315 inhabitants)
41 Km S of Bologna (386663 inhabitants)
43 Km NE of Scandicci (50609 inhabitants)
46 Km W of Faenza (58541 inhabitants)
57 Km W of Forlì (117913 inhabitants)
67 Km SE of Modena (184973 inhabitants)
72 Km W of Cesena (96758 inhabitants)
74 Km E of Lucca (89046 inhabitants)
75 Km W of Ravenna (159116 inhabitants)
82 Km SE of Carpi (70699 inhabitants)
82 Km S of Ferrara (133155 inhabitants)
85 Km NW of Arezzo (99543 inhabitants)
85 Km SE of Reggio nell'Emilia (171345 inhabitants)
88 Km NE of Pisa (89158 inhabitants)
90 Km N of Siena (53903 inhabitants)
92 Km E of Viareggio (62467 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 Md 1.1
ML 1.3
2020-03-20
09:44:01
44.13 11.35 14 2020-03-20
09:54:40
Sala Sismica INGV-Roma 77404371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-20 09:44:01 ± 0.12
Latitude 44.13 ± 0.00
Longitude 11.35 ± 0.01
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77404371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 547
Semi-minor axis of confidence ellipse (meter) 405
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.07195
Epicentral distance of station farthest from the epicenter (degree) 0.34804
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 77404371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-20 09:54:40

Md:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude Md
Reference to an origin 77404371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-20 09:54:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ZCCA.HHZ. 2020-03-20T09:44:14.41 0.6 undecidable manual S 310 0.348 96 -0.26 45
IV.LMD.HHZ. 2020-03-20T09:44:11.89 0.3 undecidable manual S 100 0.2635 99 -0.29 69
IV.ZCCA.HHZ. 2020-03-20T09:44:09.38 0.3 undecidable manual P 310 0.348 96 0.11 71
IV.RONT.HHN. 2020-03-20T09:44:09.04 0.3 undecidable manual S 155 0.1457 115 0.21 72
IV.VISG.HHZ. 2020-03-20T09:44:07.40 0.3 undecidable manual S 45 0.089 134 -0.04 74
IV.LMD.HHZ. 2020-03-20T09:44:07.92 0.1 undecidable manual P 100 0.2635 99 0.09 96
IV.SEI.HHZ. 2020-03-20T09:44:06.97 0.3 undecidable manual S 173 0.0719 142 -0.12 74
IV.RONT.HHN. 2020-03-20T09:44:05.67 0.3 undecidable manual P 155 0.1457 115 -0.22 72
IV.VISG.HHZ. 2020-03-20T09:44:05.34 0.1 undecidable manual P 45 0.089 134 0.25 97
IV.SEI.HHZ. 2020-03-20T09:44:04.99 0.1 undecidable manual P 173 0.0719 142 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHN. ML:1.6 0.0004375 0.5 AML other m 2020-03-20T09:44:12.41
IV.VISG.HHN. ML:1.3 0.000227 1.64 AML other m 2020-03-20T09:44:08.15
IV.SEI.HHE. ML:1.5 0.000355 0.32 AML other m 2020-03-20T09:44:09.22
IV.LMD.HHE. ML:0.9 3.84E-5 0.26 AML other m 2020-03-20T09:44:12.51
IV.LMD.HHN. ML:0.9 3.99E-5 0.56 AML other m 2020-03-20T09:44:14.36
IV.SEI.HHZ. Md:1.2 10 END duration s
IV.VISG.HHZ. Md:1 8 END duration s
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