Earthquake with magnitude of ML 1.8 on date 29-11-2021 and time 08:51:31 (UTC) in region 4 km SE Cetona (SI)

A magnitude ML 1.8 earthquake occured in region: 4 km SE Cetona (SI), on

  • 29-11-2021 08:51:31 (UTC)
  • 29-11-2021 09:51:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.94, 11.938 at 12 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
Cetona SI 4 2755 2755
Città della Pieve PG 6 7712 10467
Sarteano SI 8 4717 15184
Chiusi SI 9 8704 23888
San Casciano dei Bagni SI 9 1632 25520
Monteleone d'Orvieto TR 10 1467 26987
Fabro TR 10 2876 29863
Piegaro PG 13 3669 33532
Montegabbione TR 13 1216 34748
Paciano PG 14 975 35723
Allerona TR 14 1794 37517
Radicofani SI 15 1097 38614
Ficulle TR 16 1669 40283
Chianciano Terme SI 16 7105 47388
Parrano TR 16 534 47922
Panicale PG 17 5692 53614

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Perugia (166134 inhabitants)
59 Km S of Arezzo (99543 inhabitants)
60 Km N of Viterbo (67173 inhabitants)
62 Km W of Foligno (57155 inhabitants)
65 Km SE of Siena (53903 inhabitants)
70 Km E of Grosseto (82087 inhabitants)
72 Km NW of Terni (111501 inhabitants)
95 Km N of Civitavecchia (52991 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 1.8 2021-11-29
08:51:31
42.9395 11.9385 12 2021-11-29
08:58:01
Sala Sismica INGV-Roma 97934131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-29 08:51:31 ± 0.1
Latitude 42.9395 ± 0.0063
Longitude 11.9385 ± 0.0086
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97934131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 670
Semi-minor axis of confidence ellipse (meter) 577
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 318
Circular confidence region, given by single value of horizontal uncertainty (meter) 670
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.77162
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 97934131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-29 08:58:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-11-29T08:52:03.65 3.0 undecidable manual S -1.32 0
IV.MTL1.HNZ. 2021-11-29T08:52:00.24 3.0 undecidable manual S -0.62 0
IV.RIBO.EHZ.01 2021-11-29T08:51:52.51 3.0 undecidable manual S -2.56 0
IV.ATVA.EHE. 2021-11-29T08:51:46.06 0.6 undecidable manual S 37 0.4227 91 -0.06 47
IV.OSSC.HHN. 2021-11-29T08:51:46.52 1.0 undecidable manual P 319 0.7716 90 0.77 18
IV.CAFI.HHZ. 2021-11-29T08:51:45.11 0.6 undecidable manual S 3 0.3903 91 -0.03 48
IV.CSNT.HHE. 2021-11-29T08:51:44.88 1.0 undecidable manual P 319 0.7123 91 0.15 22
IV.ARCI.HHZ. 2021-11-29T08:51:43.55 0.3 undecidable manual S 256 0.3498 91 -0.41 68
IV.ATCC.EHN. 2021-11-29T08:51:43.05 1.0 undecidable manual P 64 0.5684 91 0.79 19
IV.MURB.HHE. 2021-11-29T08:51:41.68 1.0 undecidable manual P 53 0.536 91 -0.04 23
IV.ASSB.HHN. 2021-11-29T08:51:41.24 0.6 undecidable manual P 79 0.5369 91 -0.49 42
IV.MCIV.CHZ. 2021-11-29T08:51:40.63 0.3 undecidable manual S 230 0.25 92 -0.38 70
IV.ATMI.HHZ. 2021-11-29T08:51:40.63 0.3 positive manual P 31 0.4623 91 0.18 70
IV.CAFI.HHZ. 2021-11-29T08:51:39.18 0.1 positive manual P 3 0.3903 91 -0.04 96
IV.ATVA.EHE. 2021-11-29T08:51:39.61 0.3 undecidable manual P 37 0.4227 91 -0.17 69
IV.ARCI.HHZ. 2021-11-29T08:51:38.89 0.3 undecidable manual P 256 0.3498 91 0.35 68
IV.MCIV.CHZ. 2021-11-29T08:51:37.04 0.1 negative manual P 230 0.25 92 0.21 95
IV.MGAB.HHZ. 2021-11-29T08:51:37.42 0.3 undecidable manual S 102 0.1295 105 -0.04 75
IV.SACS.HHZ. 2021-11-29T08:51:36.57 0.3 undecidable manual S 193 0.0926 123 0.11 75
IV.SACS.HHZ. 2021-11-29T08:51:34.33 0.1 undecidable manual P 193 0.0926 123 0.12 100
IV.MGAB.HHZ. 2021-11-29T08:51:34.65 0.3 undecidable manual P 102 0.1295 105 -0.13 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNE. ML:1.9 0.000896 0.28 AML other m 2021-11-29T08:51:36.83
IV.SACS.HHE. ML:1.8 0.000823 0.26 AML other m 2021-11-29T08:51:36.69
IV.SACS.HHN. ML:2 0.0012415 0.26 AML other m 2021-11-29T08:51:36.85
IV.SACS.HNN. ML:2 0.0011845 0.26 AML other m 2021-11-29T08:51:36.86
IV.MGAB.HHN. ML:1.8 0.000679 0.3 AML other m 2021-11-29T08:51:39.18
IV.MGAB.HNN. ML:1.8 0.000606 0.9 AML other m 2021-11-29T08:51:39.49
IV.MGAB.HNE. ML:1.8 0.0006115 0.34 AML other m 2021-11-29T08:51:40.46
IV.MGAB.HHE. ML:1.8 0.000602 0.34 AML other m 2021-11-29T08:51:40.29
IV.MCIV.CHN. ML:1.7 0.0002785 0.82 AML other m 2021-11-29T08:51:41.37
IV.MCIV.CHE. ML:1.6 0.000215 1.06 AML other m 2021-11-29T08:51:42.69
IV.ARCI.HHN. ML:1.6 0.000151 0.44 AML other m 2021-11-29T08:51:44.72
IV.ARCI.HHE. ML:1.6 0.00014235 1.5 AML other m 2021-11-29T08:51:44.04
IV.CAFI.HHE. ML:1.8 0.0002065 0.66 AML other m 2021-11-29T08:51:45.41
IV.CAFI.HHN. ML:1.4 8.56E-5 1.3 AML other m 2021-11-29T08:51:45.98
IV.ATMI.HHE. ML:2.1 0.0003055 0.22 AML other m 2021-11-29T08:51:49.15
IV.ATMI.HHN. ML:2 0.000252 0.24 AML other m 2021-11-29T08:51:49.61
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