Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 01-12-2020 and time 18:01:42 (UTC) in region Cascia (PG)

A magnitude ML 1.1 earthquake occured in region: Cascia (PG), on

  • 01-12-2020 18:01:42 (UTC)
  • 01-12-2020 19:01:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7190, 13.0090 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cascia PG 0 3217 3217
Poggiodomo PG 6 117 3334
Monteleone di Spoleto PG 9 599 3933
Norcia PG 11 4957 8890
Vallo di Nera PG 13 364 9254
Cerreto di Spoleto PG 14 1075 10329
Sant'Anatolia di Narco PG 14 564 10893
Scheggino PG 15 461 11354
Cittareale RI 17 482 11836
Leonessa RI 18 2435 14271
Preci PG 18 724 14995
Accumoli RI 20 667 15662
Polino TR 20 233 15895

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NE of Terni (111501 inhabitants)
36 Km SE of Foligno (57155 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
57 Km W of Teramo (54892 inhabitants)
67 Km SE of Perugia (166134 inhabitants)
81 Km E of Viterbo (67173 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km N of Tivoli (56533 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-12-01
18:01:42		 42.719 13.0092 10 2020-12-01
18:07:43		 Sala Sismica INGV-Roma 85132851
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-01 18:01:42 ± 0.11
Latitude 42.7190 ± 0.0063
Longitude 13.0092 ± 0.0135
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 85132851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1184
Semi-minor axis of confidence ellipse (meter) 491
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 117
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.32286
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 2
Type of magnitude ML
Reference to an origin 85132851
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-01 18:07:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CH.BERNI.HHZ. 2020-12-01T18:03:27.70 3.0 undecidable manual Sn -9.99 0
AC.VLO.HHZ. 2020-12-01T18:03:00.45 3.0 negative manual Pn 3.68 0
GU.GSCL.HHZ. 2020-12-01T18:02:53.23 3.0 undecidable manual Sg -0.16 0
XK.SELL.HHZ. 2020-12-01T18:02:50.91 3.0 negative manual Pn 4.52 0
IV.BDI.HHZ. 2020-12-01T18:02:48.89 3.0 undecidable manual Sg 0.13 0
XK.ALB1.HHZ. 2020-12-01T18:02:46.45 3.0 undecidable manual Pn 0.71 0
IV.SPS2.HHZ. 2020-12-01T18:02:43.19 3.0 negative manual Pn 2.04 0
IV.MTMR.EHZ. 2020-12-01T18:02:42.05 3.0 undecidable manual Sn -0.23 0
XK.GIZZ.HHZ. 2020-12-01T18:02:41.24 3.0 positive manual Pn -2.7 0
SI.BOSI.HHZ. 2020-12-01T18:02:35.22 3.0 negative manual Pn -7.19 0
IV.LRP.EHZ. 2020-12-01T18:01:59.13 3.0 positive manual Pg 0.43 0
IV.LAV9.HHZ. 2020-12-01T18:01:55.81 3.0 positive manual P -2.63 0
IV.FDMO.HHZ. 2020-12-01T18:01:54.19 0.3 undecidable manual S 10 35.8419 50 -0.11 71
IV.MMO1.EHZ. 2020-12-01T18:01:53.20 0.3 undecidable manual S 52 32.745 50 -0.28 69
IV.SRES.HHZ. 2020-12-01T18:01:50.88 3.0 positive manual P -0.82 0
IV.FDMO.HHZ. 2020-12-01T18:01:49.51 0.1 undecidable manual P 10 35.8419 50 0.4 89
IV.NRCA.HHZ. 2020-12-01T18:01:48.24 0.3 undecidable manual S 34 15.3735 123 -0.08 74
IV.MMO1.EHZ. 2020-12-01T18:01:48.77 1.0 negative manual P 52 32.745 50 0.14 24
IV.ARRO.EHZ. 2020-12-01T18:01:47.18 0.1 undecidable manual P 232 25.1526 111 -0.24 94
IV.LNSS.HHZ. 2020-12-01T18:01:47.67 0.3 undecidable manual S 169 13.1757 127 -0.02 75
IV.NRCA.HHZ. 2020-12-01T18:01:45.67 0.1 undecidable manual P 34 15.3735 123 0.02 100
IV.LNSS.HHZ. 2020-12-01T18:01:45.45 0.1 undecidable manual P 169 13.1757 127 0.16 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.0 0.00009305 0.42 AML other m 2020-12-01T18:01:48.37
IV.NRCA.HHE. ML:1.2 0.0001575 0.16 AML other m 2020-12-01T18:01:48.37
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