Earthquake with magnitude of ML 0.9 on date 15-09-2019 and time 13:30:43 (Italy) in region 4 km W Monteriggioni (SI)

A magnitude ML 0.9 earthquake occured in region: 4 km W Monteriggioni (SI), on

  • 15-09-2019 11:30:43 (UTC)
  • 15-09-2019 13:30:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4, 11.18 at 8 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
Monteriggioni SI 4 9810 9810
Colle di Val d'Elsa SI 5 21620 31430
Poggibonsi SI 8 29196 60626
Castellina in Chianti SI 12 2859 63485
San Gimignano SI 13 7820 71305
Casole d'Elsa SI 13 3897 75202
Sovicille SI 14 10116 85318
Barberino Val d'Elsa FI 15 4386 89704
Siena SI 16 53903 143607
Tavarnelle Val di Pesa FI 18 7800 151407
Radda in Chianti SI 18 1613 153020
Radicondoli SI 19 914 153934
Certaldo FI 19 16121 170055

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of Siena (53903 inhabitants)
39 Km S of Scandicci (50609 inhabitants)
41 Km S of Firenze (382808 inhabitants)
53 Km S of Prato (191150 inhabitants)
57 Km W of Arezzo (99543 inhabitants)
63 Km SE of Pistoia (90315 inhabitants)
72 Km E of Pisa (89158 inhabitants)
72 Km N of Grosseto (82087 inhabitants)
72 Km E of Livorno (159219 inhabitants)
73 Km SE of Lucca (89046 inhabitants)
91 Km SE of Viareggio (62467 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 2019-09-15
11:30:43
43.4 11.18 8 2019-09-15
11:40:47
Sala Sismica INGV-Roma 72431351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-15 11:30:43 ± 0.07
Latitude 43.40 ± 0.00
Longitude 11.18 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72431351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 936
Semi-minor axis of confidence ellipse (meter) 150
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 110
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) 135
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.59085
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 72431351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-15 11:40:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RUFI.EHE. 2019-09-15T11:31:01.03 0.3 undecidable manual S 29 0.4955 50 0.08 70
IV.CRMI.HHE. 2019-09-15T11:30:58.44 0.3 undecidable manual S 340 0.4164 50 -0.17 70
IV.TRIF.CHE. 2019-09-15T11:30:56.40 0.3 undecidable manual S 215 0.3516 50 -0.31 69
IV.ASQU.HHE. 2019-09-15T11:30:55.03 0.1 undecidable manual P 48 0.5909 50 0 94
IV.RUFI.EHE. 2019-09-15T11:30:53.38 0.1 undecidable manual P 29 0.4955 50 -0.01 95
IV.CRMI.HHE. 2019-09-15T11:30:52.18 0.3 undecidable manual P 340 0.4164 50 0.14 71
IT.FIE.HGE. 2019-09-15T11:30:51.90 0.6 undecidable manual P 12 0.411 50 -0.05 48
IV.TRIF.CHE. 2019-09-15T11:30:51.17 0.3 undecidable manual P 215 0.3516 50 0.23 70
IV.FROS.CHZ. 2019-09-15T11:30:50.86 0.3 undecidable manual S 185 0.1952 110 -0.19 73
IV.OSSC.HHZ. 2019-09-15T11:30:48.51 0.3 undecidable manual S 23 0.1286 118 -0.19 74
IV.FROS.CHZ. 2019-09-15T11:30:47.92 0.3 undecidable manual P 185 0.1952 110 0.25 72
IV.CSNT.HHZ. 2019-09-15T11:30:47.68 0.3 undecidable manual S 50 0.107 123 -0.28 73
IV.OSSC.HHZ. 2019-09-15T11:30:46.52 0.1 undecidable manual P 23 0.1286 118 0.2 98
IV.CSNT.HHZ. 2019-09-15T11:30:46.04 0.1 undecidable manual P 50 0.107 123 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:0.7 7.135E-5 0.68 AML other m 2019-09-15T11:30:48.47
IV.CSNT.HHN. ML:0.8 8.985E-5 0.24 AML other m 2019-09-15T11:30:48.23
IV.OSSC.HHE. ML:0.8 7.3E-5 0.2 AML other m 2019-09-15T11:30:49.14
IV.OSSC.HHN. ML:0.7 5.86E-5 0.46 AML other m 2019-09-15T11:30:49.41
IV.FROS.CHE. ML:1.1 9.28E-5 1.68 AML other m 2019-09-15T11:30:50.11
IV.FROS.CHN. ML:1.1 9.095E-5 0.44 AML other m 2019-09-15T11:30:51.28
GU.CARD.HHN. ML:3 0.001095 0.76 AML other m 2019-09-15T11:31:33.33
GU.CARD.HHE. ML:3.6 0.00424 0.84 AML other m 2019-09-15T11:31:34.15
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