Earthquake with magnitude of ML 1.1 on date 18-10-2019 and time 02:23:14 (Italy) in region 5 km SE Monteriggioni (SI)

A magnitude ML 1.1 earthquake occured in region: 5 km SE Monteriggioni (SI), on

  • 18-10-2019 00:23:14 (UTC)
  • 18-10-2019 02:23:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.36, 11.25 at 9 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 5 9810 9810
Siena SI 8 53903 63713
Sovicille SI 9 10116 73829
Castellina in Chianti SI 13 2859 76688
Colle di Val d'Elsa SI 13 21620 98308
Poggibonsi SI 15 29196 127504
Casole d'Elsa SI 17 3897 131401
Radda in Chianti SI 17 1613 133014
Gaiole in Chianti SI 19 2758 135772
Monteroni d'Arbia SI 20 9088 144860

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NW of Siena (53903 inhabitants)
45 Km S of Scandicci (50609 inhabitants)
46 Km S of Firenze (382808 inhabitants)
53 Km W of Arezzo (99543 inhabitants)
59 Km S of Prato (191150 inhabitants)
68 Km N of Grosseto (82087 inhabitants)
69 Km SE of Pistoia (90315 inhabitants)
79 Km E of Livorno (159219 inhabitants)
79 Km SE of Pisa (89158 inhabitants)
81 Km SE of Lucca (89046 inhabitants)
96 Km W of Perugia (166134 inhabitants)
98 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 1.1 2019-10-18
00:23:14
43.36 11.25 9 2019-10-18
00:33:21
Sala Sismica INGV-Roma 73314971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-18 00:23:14 ± 0.1
Latitude 43.36 ± 0.00
Longitude 11.25 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73314971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1064
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
Circular confidence region, given by single value of horizontal uncertainty (meter) 1060
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.11691
Epicentral distance of station farthest from the epicenter (degree) 0.63492
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 73314971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-18 00:33:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CASP.HHZ. 2019-10-18T00:23:35.89 0.6 undecidable manual S 206 0.6349 50 -0.29 43
IV.ARCI.HNZ. 2019-10-18T00:23:32.68 0.6 undecidable manual S 162 0.5342 50 -0.51 42
IV.RUFI.EHN. 2019-10-18T00:23:32.60 0.6 undecidable manual S 21 0.5135 50 0.02 47
IV.CRMI.HHN. 2019-10-18T00:23:31.32 0.6 undecidable manual S 336 0.4775 50 -0.2 45
IV.MAGO.CHN. 2019-10-18T00:23:30.02 0.6 undecidable manual S 259 0.4398 50 -0.37 44
IV.CASP.HHZ. 2019-10-18T00:23:27.67 1.0 undecidable manual P 206 0.6349 50 0.65 19
TV.SF01.EHN. 2019-10-18T00:23:27.88 0.6 undecidable manual P 157 0.5936 50 1.57 25
IV.TRIF.CHE. 2019-10-18T00:23:27.40 0.6 undecidable manual S 226 0.3525 50 -0.41 44
IV.RUFI.EHN. 2019-10-18T00:23:25.17 0.1 undecidable manual P 21 0.5135 50 0.23 89
IV.CRMI.HHN. 2019-10-18T00:23:24.38 0.1 undecidable manual P 336 0.4775 50 0.05 93
IV.ARCI.HNZ. 2019-10-18T00:23:24.86 0.1 undecidable manual P 162 0.5342 50 -0.43 85
IV.MAGO.CHN. 2019-10-18T00:23:23.93 0.1 undecidable manual P 259 0.4398 50 0.25 90
IV.RIBO.EHE.01 2019-10-18T00:23:23.65 1.0 undecidable manual P 200 0.4371 50 0.02 24
IV.TRIF.CHE. 2019-10-18T00:23:22.51 0.1 undecidable manual P 226 0.3525 50 0.32 90
IV.OSSC.HHZ. 2019-10-18T00:23:21.54 0.3 undecidable manual S 359 0.1637 117 -0.02 75
IV.FROS.CHZ. 2019-10-18T00:23:21.51 0.3 undecidable manual S 205 0.1655 117 -0.11 74
IV.CSNT.HHZ. 2019-10-18T00:23:19.67 0.3 undecidable manual S 14 0.1169 125 -0.34 71
IV.OSSC.HHZ. 2019-10-18T00:23:18.59 0.1 negative manual P 359 0.1637 117 0.02 100
IV.FROS.CHZ. 2019-10-18T00:23:18.82 0.1 positive manual P 205 0.1655 117 0.21 96
IV.CSNT.HHZ. 2019-10-18T00:23:17.62 0.1 negative manual P 14 0.1169 125 -0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.1 0.0001369452 0.14 AML other m 2019-10-18T00:23:20.17
IV.CSNT.HHN. ML:1.3 0.00022977985 0.12 AML other m 2019-10-18T00:23:20.15
IV.OSSC.HHE. ML:1.1 0.000102500005 0.16 AML other m 2019-10-18T00:23:21.89
IV.OSSC.HHN. ML:1 9.210562E-5 0.18 AML other m 2019-10-18T00:23:22.10
IV.OSSC.HNE. ML:1 9.1234575E-5 0.17 AML other m 2019-10-18T00:23:22.01
IV.OSSC.HNN. ML:1.3 0.0001770643 0.33 AML other m 2019-10-18T00:23:21.65
IV.FROS.CHE. ML:1.1 0.000110011075 0.248 AML other m 2019-10-18T00:23:22.88
IV.FROS.CHN. ML:1.3 0.00017226685 0.152 AML other m 2019-10-18T00:23:22.91
IV.CASP.HHE. ML:1 1.44471475E-5 0.8 AML other m 2019-10-18T00:23:36.46
IV.CASP.HHN. ML:0.8 1.158536E-5 0.72 AML other m 2019-10-18T00:23:35.75
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