Earthquake with magnitude of ML 1.8 on date 02-08-2020 and time 14:30:36 (UTC) in region 8 km W Castelnuovo di Val di Cecina (PI)

A magnitude ML 1.8 earthquake occured in region: 8 km W Castelnuovo di Val di Cecina (PI), on

  • 02-08-2020 14:30:36 (UTC)
  • 02-08-2020 16:30:36 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.24, 10.81 at 10 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
Castelnuovo di Val di Cecina PI 8 2231 2231
Pomarance PI 9 5897 8128
Monteverdi Marittimo PI 10 758 8886
Monterotondo Marittimo GR 11 1371 10257
Guardistallo PI 17 1234 11491
Casale Marittimo PI 17 1122 12613
Bibbona LI 18 3175 15788
Montescudaio PI 18 2144 17932
Montecatini Val di Cecina PI 18 1749 19681
Sassetta LI 18 514 20195
Castagneto Carducci LI 18 9010 29205
Volterra PI 19 10519 39724
Radicondoli SI 19 914 40638

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Siena (53903 inhabitants)
54 Km SE of Livorno (159219 inhabitants)
58 Km NW of Grosseto (82087 inhabitants)
63 Km SE of Pisa (89158 inhabitants)
65 Km SW of Scandicci (50609 inhabitants)
69 Km SW of Firenze (382808 inhabitants)
72 Km SE of Lucca (89046 inhabitants)
75 Km SW of Prato (191150 inhabitants)
78 Km S of Pistoia (90315 inhabitants)
84 Km SE of Viareggio (62467 inhabitants)
90 Km W of Arezzo (99543 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
Reviewed
Rev100
ML 1.8 2020-08-02
14:30:36
43.24 10.81 10 2020-08-02
14:40:52
Sala Sismica INGV-Roma 81579981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-02 14:30:36 ± 0.1
Latitude 43.24 ± 0.01
Longitude 10.81 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81579981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 990
Semi-minor axis of confidence ellipse (meter) 543
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
Circular confidence region, given by single value of horizontal uncertainty (meter) 990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.78421
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 81579981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-02 14:40:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2020-08-02T14:32:32.87 3.0 undecidable manual Sg 15.07 0
IV.HPAC.HHZ. 2020-08-02T14:32:30.75 3.0 negative manual Pg 12.4 0
IV.BRMO.HHZ. 2020-08-02T14:32:12.08 3.0 undecidable manual Sn 0.31 0
IV.PANTE.HHZ. 2020-08-02T14:32:12.47 3.0 undecidable manual Pn 0.21 0
AC.VLO.HHZ. 2020-08-02T14:32:06.24 3.0 undecidable manual Pn -1.25 0
IV.LADO.EHZ. 2020-08-02T14:32:02.71 3.0 positive manual Pg 5.61 0
IV.CET2.HHZ. 2020-08-02T14:32:00.03 3.0 undecidable manual Pg 12.32 0
IV.ILOS.HNZ. 2020-08-02T14:31:58.05 3.0 undecidable manual Pn 2.5 0
IV.IFIL.HHZ. 2020-08-02T14:31:57.53 3.0 positive manual Pg 4.94 0
IV.MAGA.HHZ. 2020-08-02T14:31:54.98 3.0 undecidable manual Sn 0.59 0
IV.SGG.HHZ. 2020-08-02T14:31:52.94 3.0 undecidable manual Sg 6.18 0
IV.ROSPO.HHZ. 2020-08-02T14:31:43.65 3.0 undecidable manual Sg 2.34 0
IV.MCRV.HHZ. 2020-08-02T14:31:33.38 3.0 undecidable manual Pg 4.33 0
GU.GBOS.HHZ. 2020-08-02T14:31:31.73 3.0 undecidable manual Pn 2.13 0
IV.MILN.HNZ. 2020-08-02T14:31:30.95 3.0 undecidable manual Pn 4.68 0
IV.ZONE.HHZ. 2020-08-02T14:31:29.64 3.0 undecidable manual Pg 5.68 0
IV.VVLD.HHZ. 2020-08-02T14:31:27.74 3.0 undecidable manual Sg -1.27 0
GU.GRAM.HHZ. 2020-08-02T14:31:20.73 3.0 positive manual Pg 9.49 0
OT.OT11.EHZ. 2020-08-02T14:31:18.70 3.0 positive manual Pn -4.61 0
IV.RONT.HHZ. 2020-08-02T14:31:07.03 3.0 undecidable manual Sn -3.08 0
IV.ROSPO.HHZ. 2020-08-02T14:31:06.95 3.0 positive manual Pn -7.45 0
IV.RUFI.EHZ. 2020-08-02T14:31:02.69 0.3 undecidable manual S 40 0.7842 50 0.15 66
IV.CRMI.HHN. 2020-08-02T14:30:55.89 0.3 undecidable manual S 12 0.5711 50 -0.33 66
IV.PII.HHZ. 2020-08-02T14:30:54.65 0.3 undecidable manual S 337 0.527 50 -0.29 67
TV.SF04.EHZ. 2020-08-02T14:30:52.13 3.0 negative manual P -0.35 0
IV.MCIV.CHZ. 2020-08-02T14:30:52.94 3.0 undecidable manual P 0.03 0
IV.CSNT.HHE. 2020-08-02T14:30:51.12 0.3 undecidable manual S 56 0.4191 50 -0.61 63
IV.RUFI.EHZ. 2020-08-02T14:30:51.92 0.6 undecidable manual P 40 0.7842 50 0.39 42
IV.PESA.HHZ. 2020-08-02T14:30:49.98 3.0 undecidable manual P -5.12 0
IV.RIBO.EHE.01 2020-08-02T14:30:48.76 0.3 undecidable manual S 149 0.3345 50 -0.47 67
IV.CRMI.HHN. 2020-08-02T14:30:48.40 0.1 undecidable manual P 12 0.5711 50 0.52 84
IV.PII.HHZ. 2020-08-02T14:30:47.30 0.3 undecidable manual P 337 0.527 50 0.16 69
IV.CASP.HHZ. 2020-08-02T14:30:46.13 0.6 undecidable manual P 175 0.4479 50 0.35 45
IV.CSNT.HHE. 2020-08-02T14:30:45.41 0.1 undecidable manual P 56 0.4191 50 0.12 95
IV.RIBO.EHE.01 2020-08-02T14:30:44.26 0.6 undecidable manual P 149 0.3345 50 0.42 45
IV.FROS.CHZ. 2020-08-02T14:30:42.36 0.1 undecidable manual P 96 0.2518 109 -0.03 100
IV.TRIF.CHE. 2020-08-02T14:30:42.48 0.1 undecidable manual S 152 0.1385 121 -0.28 97
IV.MAGO.CHN. 2020-08-02T14:30:41.70 0.1 undecidable manual S 288 0.1187 126 -0.41 95
IV.TRIF.CHE. 2020-08-02T14:30:40.40 0.1 undecidable manual P 152 0.1385 121 0.29 97
IV.MAGO.CHN. 2020-08-02T14:30:39.96 0.1 undecidable manual P 288 0.1187 126 0.23 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCIV.CHE. ML:1.9 0.0001009 0.12 AML other m 2020-08-02T14:30:53.12
IV.RONT.HHN. ML:2.3 0.0002015 0.22 AML other m 2020-08-02T14:30:57.95
IV.RINC.HHN. ML:1.8 5.81E-5 1.2 AML other m 2020-08-02T14:30:58.95
IV.RINC.HHE. ML:1.6 4.615E-5 1.1 AML other m 2020-08-02T14:31:00.24
IV.PARC.HHN. ML:1.6 2.65E-5 0.46 AML other m 2020-08-02T14:31:01.72
IV.PARC.HHE. ML:1.6 2.68E-5 0.4 AML other m 2020-08-02T14:31:03.74
IV.MCIV.CHN. ML:1.8 7.555E-5 0.4 AML other m 2020-08-02T14:31:07.90
IV.LMD.HHE. ML:1.6 3.195E-5 0.48 AML other m 2020-08-02T14:31:16.03
IV.RONT.HHE. ML:2.5 0.0003375 1.2 AML other m 2020-08-02T14:31:16.65
IV.SFI.EHE. ML:1.6 3.585E-5 0.9 AML other m 2020-08-02T14:31:18.90
IV.SFI.EHN. ML:1.4 2.02E-5 1.16 AML other m 2020-08-02T14:31:20.11
IV.LMD.HHN. ML:1.7 3.65E-5 0.72 AML other m 2020-08-02T14:31:20.42
IV.BRMO.HHN. ML:3.1 0.0001054 0.1 AML other m 2020-08-02T14:31:32.94
IV.BRMO.HHE. ML:3 7.34E-5 0.12 AML other m 2020-08-02T14:31:33.17
IV.MAGA.HHE. ML:2.7 7.505E-5 0.06 AML other m 2020-08-02T14:32:05.26
IV.MAGA.HHN. ML:2.5 5.15E-5 0.16 AML other m 2020-08-02T14:32:06.44
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download