Earthquake with magnitude of ML 1.7 on date 19-10-2021 and time 10:26:40 (UTC) in region 3 km SW Castelnuovo di Val di Cecina (PI)

A magnitude ML 1.7 earthquake occured in region: 3 km SW Castelnuovo di Val di Cecina (PI), on

  • 19-10-2021 10:26:40 (UTC)
  • 19-10-2021 12:26:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.194, 10.875 at 7 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 3 2231 2231
Monterotondo Marittimo GR 6 1371 3602
Pomarance PI 12 5897 9499
Monteverdi Marittimo PI 13 758 10257
Montieri GR 14 1204 11461
Radicondoli SI 16 914 12375
Massa Marittima GR 16 8375 20750
Chiusdino SI 18 1903 22653
Sassetta LI 20 514 23167

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km W of Siena (53903 inhabitants)
52 Km NW of Grosseto (82087 inhabitants)
61 Km SE of Livorno (159219 inhabitants)
68 Km SW of Scandicci (50609 inhabitants)
70 Km SE of Pisa (89158 inhabitants)
71 Km SW of Firenze (382808 inhabitants)
78 Km SE of Lucca (89046 inhabitants)
79 Km S of Prato (191150 inhabitants)
82 Km S of Pistoia (90315 inhabitants)
87 Km W of Arezzo (99543 inhabitants)
90 Km SE of Viareggio (62467 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.7 2021-10-19
10:26:40
43.1938 10.8747 7 2021-10-19
10:33:56
Sala Sismica INGV-Roma 96757841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 10:26:40 ± 0.09
Latitude 43.1938 ± 0.0045
Longitude 10.8747 ± 0.0074
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96757841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 403
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 530
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.85526
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 96757841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 10:33:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OX.DRE.HHZ. 2021-10-19T10:28:34.88 3.0 undecidable manual Sg 12.58 0
OT.OT17.EHZ. 2021-10-19T10:28:32.98 3.0 undecidable manual Sg 7.98 0
IV.ERC.EHZ. 2021-10-19T10:28:13.58 3.0 undecidable manual Pg 11.66 0
IV.PTQR.HHZ. 2021-10-19T10:27:53.63 3.0 undecidable manual Sg 4.12 0
IV.CADC.HNZ. 2021-10-19T10:27:52.42 3.0 undecidable manual Sg 1.56 0
IV.PP3.EHZ. 2021-10-19T10:27:47.32 3.0 undecidable manual Sg 2.63 0
IV.MMO1.EHZ. 2021-10-19T10:27:41.84 3.0 undecidable manual Sg 1.58 0
IV.FREG.EHZ. 2021-10-19T10:27:37.66 3.0 undecidable manual Pg 7.77 0
IV.FOSV.EHZ. 2021-10-19T10:27:25.07 3.0 undecidable manual S -4.4 0
GU.POPM.HHZ. 2021-10-19T10:27:09.30 0.6 undecidable manual S 354 0.8553 50 0.41 41
IV.CELB.HHZ. 2021-10-19T10:27:03.27 0.6 undecidable manual S 228 0.6601 50 0.16 45
IV.CRMI.HHZ. 2021-10-19T10:27:01.23 0.6 undecidable manual S 7 0.6061 50 -0.29 44
GU.POPM.HHZ. 2021-10-19T10:26:57.34 0.6 undecidable manual P 354 0.8553 50 0.54 39
IV.CAFI.HHZ. 2021-10-19T10:26:56.87 3.0 negative manual P -2.18 0
IV.RUFI.EHZ. 2021-10-19T10:26:56.22 3.0 positive manual P -2.06 0
IV.OSSC.HHZ. 2021-10-19T10:26:56.04 0.3 undecidable manual S 39 0.4263 50 -0.14 71
IV.CASP.HHZ. 2021-10-19T10:26:55.06 0.3 undecidable manual S 181 0.4029 50 -0.43 67
IV.CSNT.HHZ. 2021-10-19T10:26:54.92 0.6 undecidable manual S 47 0.411 50 -0.82 39
IV.CELB.HHZ. 2021-10-19T10:26:53.90 0.1 positive manual P 228 0.6601 50 0.44 85
TV.SF04.EHZ. 2021-10-19T10:26:53.85 3.0 undecidable manual P -2.82 0
IV.CRMI.HHZ. 2021-10-19T10:26:52.85 0.1 positive manual P 7 0.6061 50 0.31 88
IV.RIBO.EHZ.01 2021-10-19T10:26:50.88 0.6 undecidable manual S 153 0.2752 104 -0.3 47
IV.OSSC.HHZ. 2021-10-19T10:26:49.43 0.1 positive manual P 39 0.4263 50 -0.03 97
IV.CASP.HHZ. 2021-10-19T10:26:49.00 0.3 positive manual P 181 0.4029 50 -0.06 72
IV.CSNT.HHZ. 2021-10-19T10:26:49.17 0.3 negative manual P 47 0.411 50 -0.04 73
IV.FROS.CHZ. 2021-10-19T10:26:48.66 0.3 undecidable manual S 85 0.2059 108 0.05 76
IV.RIBO.EHZ.01 2021-10-19T10:26:46.68 0.6 undecidable manual P 153 0.2752 104 0.11 49
IV.MAGO.CHZ. 2021-10-19T10:26:46.88 0.3 undecidable manual S 297 0.1763 111 -0.67 65
IV.FROS.CHZ. 2021-10-19T10:26:45.30 0.3 negative manual P 85 0.2059 108 0.21 73
IV.TRIF.CHZ. 2021-10-19T10:26:44.24 0.3 undecidable manual S 165 0.0818 129 -0.09 77
IV.MAGO.CHZ. 2021-10-19T10:26:44.57 0.6 positive manual P 297 0.1763 111 0.09 50
IV.TRIF.CHZ. 2021-10-19T10:26:42.82 0.1 negative manual P 165 0.0818 129 0.2 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:2.3 0.003285 0.2 AML other m 2021-10-19T10:26:45.44
IV.TRIF.CHN. ML:2.3 0.003245 1.34 AML other m 2021-10-19T10:26:46.29
IV.MAGO.CHE. ML:2 0.00079 0.76 AML other m 2021-10-19T10:26:47.74
IV.MAGO.CHN. ML:2 0.0008565 0.1 AML other m 2021-10-19T10:26:48.20
IV.FROS.CHN. ML:2 0.0006095 0.2 AML other m 2021-10-19T10:26:49.87
IV.FROS.CHE. ML:1.8 0.000433 0.72 AML other m 2021-10-19T10:26:51.40
IV.CASP.HHN. ML:1.6 0.000132 0.34 AML other m 2021-10-19T10:26:55.21
IV.CASP.HHE. ML:1.5 9.575E-5 0.42 AML other m 2021-10-19T10:26:55.74
IV.CSNT.HHN. ML:1.4 6.98E-5 1.2 AML other m 2021-10-19T10:26:55.85
IV.CSNT.HHE. ML:1.4 7.455E-5 0.14 AML other m 2021-10-19T10:26:56.18
IV.OSSC.HHN. ML:1.7 0.0001325 0.38 AML other m 2021-10-19T10:26:56.55
IV.OSSC.HHE. ML:1.6 0.000116 1.66 AML other m 2021-10-19T10:26:56.05
IV.CRMI.HHN. ML:1.2 2.515E-5 0.18 AML other m 2021-10-19T10:27:02.72
IV.CRMI.HHE. ML:1 2.15E-5 1.62 AML other m 2021-10-19T10:27:02.08
IV.CELB.HHN. ML:1.6 6.28E-5 1.14 AML other m 2021-10-19T10:27:05.69
IV.CELB.HHE. ML:1.8 8.965E-5 1.12 AML other m 2021-10-19T10:27:05.02
GU.POPM.HHN. ML:1.6 3.985E-5 0.3 AML other m 2021-10-19T10:27:11.59
GU.POPM.HHE. ML:1.6 3.965E-5 1.18 AML other m 2021-10-19T10:27:13.60
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download