Earthquake with magnitude of ML 1.2 on date 09-12-2021 and time 04:29:59 (UTC) in region 3 km E Cerreto di Spoleto (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km E Cerreto di Spoleto (PG), on

  • 09-12-2021 04:29:59 (UTC)
  • 09-12-2021 05:29:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.819, 12.95 at 11 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
Cerreto di Spoleto PG 3 1075 1075
Sellano PG 8 1079 2154
Vallo di Nera PG 9 364 2518
Preci PG 10 724 3242
Poggiodomo PG 12 117 3359
Norcia PG 12 4957 8316
Cascia PG 12 3217 11533
Sant'Anatolia di Narco PG 13 564 12097
Campello sul Clitunno PG 14 2442 14539
Scheggino PG 15 461 15000
Visso MC 17 1107 16107
Trevi PG 18 8469 24576
Monteleone di Spoleto PG 19 599 25175
Castelsantangelo sul Nera MC 19 281 25456
Spoleto PG 20 38218 63674
Monte Cavallo MC 20 145 63819

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SE of Foligno (57155 inhabitants)
38 Km NE of Terni (111501 inhabitants)
56 Km SE of Perugia (166134 inhabitants)
64 Km NW of L'Aquila (69753 inhabitants)
64 Km W of Teramo (54892 inhabitants)
82 Km NE of Viterbo (67173 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
100 Km SW of Ancona (100861 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 1.2 2021-12-09
04:29:59
42.8187 12.9502 11 2021-12-09
05:20:12
Sala Sismica INGV-Roma 98336351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-09 04:29:59 ± 0.09
Latitude 42.8187 ± 0.0045
Longitude 12.9502 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98336351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 453
Semi-minor axis of confidence ellipse (meter) 338
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 13
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30937
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 98336351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-09 05:20:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GIZZ.HHZ. 2021-12-09T04:31:13.00 3.0 positive manual Pg 12.27 0
IV.BRMO.HHZ. 2021-12-09T04:31:09.50 3.0 undecidable manual Pg 10.24 0
IX.COL3.HHZ.02 2021-12-09T04:31:08.20 3.0 undecidable manual Sn -1.77 0
IX.CMP3.EHZ.02 2021-12-09T04:31:07.01 3.0 undecidable manual Sg -0.33 0
SI.ABSI.HHZ. 2021-12-09T04:31:00.34 3.0 undecidable manual Pn 0.74 0
IV.IMOL.HNZ. 2021-12-09T04:30:57.15 3.0 undecidable manual Sg 4.09 0
OT.OT13.EHZ. 2021-12-09T04:30:37.84 3.0 negative manual Pg 1.48 0
IV.RIBO.EHZ.01 2021-12-09T04:30:34.12 3.0 undecidable manual S -2.89 0
IV.FIR.HHZ. 2021-12-09T04:30:26.54 3.0 negative manual Pg 3.56 0
IV.LRP.EHZ. 2021-12-09T04:30:12.01 3.0 undecidable manual P -2.95 0
IV.ASSB.HHZ. 2021-12-09T04:30:10.99 0.6 undecidable manual S 316 0.3094 50 -0.26 46
IV.MOMA.HNE. 2021-12-09T04:30:10.12 0.6 undecidable manual S 267 0.2788 50 -0.24 46
IV.MMO1.HNZ. 2021-12-09T04:30:10.64 0.6 undecidable manual S 74 0.2878 50 0.03 48
IV.FDMO.HHZ. 2021-12-09T04:30:08.99 0.6 undecidable manual S 25 0.2401 50 -0.2 47
IV.MC2.EHZ. 2021-12-09T04:30:08.14 0.6 undecidable manual S 62 0.1979 50 0.19 48
IV.LNSS.HNN. 2021-12-09T04:30:08.66 0.6 undecidable manual S 163 0.2257 50 -0.11 48
IV.CESI.HHZ. 2021-12-09T04:30:07.40 0.6 undecidable manual S 350 0.1889 50 -0.29 47
IV.MOMA.HNE. 2021-12-09T04:30:06.08 0.1 undecidable manual P 267 0.2788 50 0.27 92
IV.ASSB.HHZ. 2021-12-09T04:30:06.75 0.3 undecidable manual P 316 0.3094 50 0.43 66
IV.NRCA.HHZ. 2021-12-09T04:30:05.37 0.6 undecidable manual S 83 0.1214 129 -0.24 48
IV.MMO1.HNZ. 2021-12-09T04:30:05.92 0.3 undecidable manual P 74 0.2878 50 -0.03 72
IV.FDMO.HHZ. 2021-12-09T04:30:05.02 0.1 undecidable manual P 25 0.2401 50 -0.12 96
IV.ARRO.EHN. 2021-12-09T04:30:05.60 0.6 undecidable manual P 210 0.2752 50 -0.14 47
IV.MC2.EHZ. 2021-12-09T04:30:04.53 0.1 undecidable manual P 62 0.1979 50 0.11 97
IV.LNSS.HNN. 2021-12-09T04:30:04.83 0.1 undecidable manual P 163 0.2257 50 -0.07 97
IV.FEMA.HNN. 2021-12-09T04:30:04.23 0.3 undecidable manual P 27 0.161 50 0.44 68
IV.CESI.HHZ. 2021-12-09T04:30:04.11 0.1 undecidable manual P 350 0.1889 50 -0.16 96
IV.NRCA.HHZ. 2021-12-09T04:30:03.08 0.1 undecidable manual P 83 0.1214 129 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.2 0.0001535 0.6 AML other m 2021-12-09T04:30:05.91
IV.NRCA.HHE. ML:1.2 0.00014605515 0.0992 AML other m 2021-12-09T04:30:05.60
IV.NRCA.HNE. ML:1.1 0.000133538485 0.0896 AML other m 2021-12-09T04:30:05.65
IV.NRCA.HNN. ML:1.2 0.00017619555 0.5792 AML other m 2021-12-09T04:30:05.25
IV.CESI.HHE. ML:0.5 2.0419525E-5 0.08 AML other m 2021-12-09T04:30:07.62
IV.CESI.HHN. ML:0.5 1.9987165E-5 0 AML other m 2021-12-09T04:30:07.61
IV.CESI.HNE. ML:1.4 0.00017394735 0.9184 AML other m 2021-12-09T04:30:05.57
IV.CESI.HNN. ML:1.4 0.00015358982 0.9888 AML other m 2021-12-09T04:30:19.80
IV.MC2.EHE. ML:1.3 0.00012086051 1.1584 AML other m 2021-12-09T04:30:06.24
IV.MC2.EHN. ML:1.4 0.00016410076 1.4016 AML other m 2021-12-09T04:30:07.40
IV.FDMO.HHE. ML:1.1 6.308366E-5 0.3808 AML other m 2021-12-09T04:30:09.18
IV.FDMO.HHN. ML:0.9 4.096976E-5 0.1184 AML other m 2021-12-09T04:30:09.21
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