Earthquake with magnitude of ML 2.0 on date 07-12-2018 and time 23:30:42 (UTC) in region 1 km N Chiusdino (SI)

A magnitude ML 2.0 earthquake occured in region: 1 km N Chiusdino (SI), on

  • 07-12-2018 23:30:42 (UTC)
  • 08-12-2018 00:30:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.16, 11.09 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Chiusdino SI 1 1903 1903
Montieri GR 7 1204 3107
Monticiano SI 8 1571 4678
Radicondoli SI 11 914 5592
Castelnuovo di Val di Cecina PI 15 2231 7823
Sovicille SI 17 10116 17939
Roccastrada GR 18 9199 27138
Monterotondo Marittimo GR 19 1371 28509
Casole d'Elsa SI 20 3897 32406

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Siena (53903 inhabitants)
45 Km N of Grosseto (82087 inhabitants)
67 Km S of Scandicci (50609 inhabitants)
69 Km S of Firenze (382808 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
76 Km SE of Livorno (159219 inhabitants)
80 Km S of Prato (191150 inhabitants)
83 Km SE of Pisa (89158 inhabitants)
87 Km S of Pistoia (90315 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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 1000 ML 2.0 2018-12-07
23:30:42
43.16 11.09 9 2019-06-04
09:16:19
Bollettino Sismico Italiano INGV 69170821
Rev 100 ML 2.1 2018-12-07
23:30:42
43.15 11.09 11 2018-12-07
23:40:06
Sala Sismica INGV-Roma 63752241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-07 23:30:42 ± 0.25
Latitude 43.16 ± 0.01
Longitude 11.09 ± 0.01
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 69170821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1049
Semi-minor axis of confidence ellipse (meter) 421
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 109
Circular confidence region, given by single value of horizontal uncertainty (meter) 1050
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 60
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.98476
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 69170821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-06-03 10:54:38

ML:2.1

Field Value
Value 2.1
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 63752241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-07 23:40:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.ORP.HGZ. 2018-12-07T23:32:27.45 3.0 undecidable manual Sn 2.17 0
IV.MTGR.HHZ. 2018-12-07T23:32:10.26 3.0 negative manual Pg 10.19 0
IT.ORP.HGZ. 2018-12-07T23:31:52.97 3.0 undecidable manual Pg 15.01 0
IV.NDIM.HHZ. 2018-12-07T23:31:09.21 3.0 negative manual Pg 2.15 0
IV.MAON.HHZ. 2018-12-07T23:31:08.58 0.3 undecidable manual S 177 0.7365 50 0.97 52
IV.CELB.HHZ. 2018-12-07T23:31:08.26 0.6 undecidable manual S 237 0.7653 50 -0.19 45
IV.CRE.HHZ. 2018-12-07T23:31:08.81 0.6 undecidable manual S 54 0.7752 50 0.07 46
IV.RUFI.EHZ. 2018-12-07T23:31:07.23 0.6 undecidable manual S 24 0.7392 50 -0.46 43
IV.PII.HHZ. 2018-12-07T23:31:05.80 0.6 undecidable manual S 324 0.6898 50 -0.43 44
IV.ATVO.HHZ. 2018-12-07T23:31:01.63 0.1 undecidable manual P 77 0.9848 50 0.26 85
IV.PARC.HHZ. 2018-12-07T23:31:01.49 0.3 undecidable manual P 60 0.9659 50 0.44 61
TV.SF01.EHZ. 2018-12-07T23:31:00.42 0.6 undecidable manual S 135 0.4955 50 -0.05 49
IV.ATMI.HHZ. 2018-12-07T23:31:00.12 0.1 undecidable manual P 78 0.8768 50 0.6 79
IV.SSP9.EHZ. 2018-12-07T23:30:59.91 0.1 undecidable manual P 61 0.8624 50 0.64 78
TV.SF04.EHZ. 2018-12-07T23:30:59.88 0.6 undecidable manual S 128 0.5333 50 -1.69 24
IV.CRE.HHZ. 2018-12-07T23:30:58.34 0.1 undecidable manual P 54 0.7752 50 0.56 82
IV.CELB.HHZ. 2018-12-07T23:30:58.31 0.1 undecidable manual P 237 0.7653 50 0.7 78
IV.RUFI.EHZ. 2018-12-07T23:30:57.51 0.1 undecidable manual P 24 0.7392 50 0.34 88
IV.MAON.HHZ. 2018-12-07T23:30:57.81 0.3 undecidable manual P 177 0.7365 50 0.69 59
IV.PII.HHZ. 2018-12-07T23:30:56.22 0.3 undecidable manual P 324 0.6898 50 -0.11 70
IV.ARCI.HHZ. 2018-12-07T23:30:56.97 0.6 undecidable manual S 138 0.4227 50 -1.33 31
IV.CAFI.HHZ. 2018-12-07T23:30:55.77 0.1 negative manual P 75 0.661 50 -0.06 95
IV.CSNT.HHZ. 2018-12-07T23:30:54.64 0.3 undecidable manual S 26 0.3417 50 -1.27 49
TV.SF04.EHZ. 2018-12-07T23:30:53.54 0.1 negative manual P 128 0.5333 50 -0.1 96
TV.SF01.EHZ. 2018-12-07T23:30:52.87 0.1 undecidable manual P 135 0.4955 50 -0.14 97
IV.ARCI.HHZ. 2018-12-07T23:30:51.44 0.3 undecidable manual P 138 0.4227 50 -0.31 71
Z3.A318A.HHZ. 2018-12-07T23:30:50.73 0.1 undecidable manual P 264 0.3768 50 -0.24 97
IV.RIBO.EHZ. 2018-12-07T23:30:50.88 0.6 undecidable manual S 188 0.2176 110 -0.84 41
IV.CSNT.HHZ. 2018-12-07T23:30:49.98 0.1 undecidable manual P 26 0.3417 50 -0.39 94
IV.RIBO.EHZ. 2018-12-07T23:30:47.72 0.1 undecidable manual P 188 0.2176 110 -0.23 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:2.1 0.000461 1.76 AML other m 2018-12-07T23:30:55.02
IV.CSNT.HHE. ML:1.8 0.000233 1 AML other m 2018-12-07T23:30:55.52
IV.CAFI.HHN. ML:1.4 4.03E-5 0.6 AML other m 2018-12-07T23:30:56.32
IV.CAFI.HHE. ML:1.6 6.785E-5 1.38 AML other m 2018-12-07T23:30:56.90
IV.CAFI.HNE. ML:1.7 7.805E-5 1.38 AML other m 2018-12-07T23:30:56.90
IV.ARCI.HHE. ML:1.7 0.0001345 1.3 AML other m 2018-12-07T23:30:59.13
IV.ARCI.HHN. ML:1.9 0.0002105 0.42 AML other m 2018-12-07T23:30:59.01
TV.SF01.EHN. ML:2.1 0.0002765 1.72 AML other m 2018-12-07T23:31:00.88
TV.SF01.EHE. ML:2.1 0.0003115 1.76 AML other m 2018-12-07T23:31:01.88
TV.SF04.EHN. ML:2.3 0.0004555 0.2 AML other m 2018-12-07T23:31:02.19
TV.SF04.EHE. ML:2.2 0.0003735 0.32 AML other m 2018-12-07T23:31:02.18
IV.CELB.HHE. ML:2.2 0.0002145 0.06 AML other m 2018-12-07T23:31:09.34
IV.CELB.HHN. ML:2.3 0.000259 0.38 AML other m 2018-12-07T23:31:10.81
IV.CAFI.HNN. ML:2.5 0.000519 0.5 AML other m 2018-12-07T23:31:11.45
IV.NDIM.HHN. ML:3.4 0.0008745 0.06 AML other m 2018-12-07T23:31:11.94
IV.NDIM.HHE. ML:3.7 0.00167 1.94 AML other m 2018-12-07T23:31:12.97
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download