Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.1 on date 30-11-2017 and time 05:20:31 (UTC) in region 1 km W Spello (PG)

A magnitude ML 0.1 earthquake occured in region: 1 km W Spello (PG), on

  • 30-11-2017 05:20:31 (UTC)
  • 30-11-2017 06:20:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9970, 12.6550 at 8 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
Spello PG 1 8645 8645
Cannara PG 6 4305 12950
Foligno PG 6 57155 70105
Bevagna PG 8 5081 75186
Assisi PG 9 28299 103485
Valtopina PG 11 1398 104883
Montefalco PG 11 5679 110562
Bastia Umbra PG 12 21874 132436
Gualdo Cattaneo PG 13 6155 138591
Bettona PG 14 4367 142958
Trevi PG 15 8469 151427
Nocera Umbra PG 17 5839 157266
Torgiano PG 18 6725 163991
Valfabbrica PG 19 3389 167380
Giano dell'Umbria PG 19 3846 171226
Deruta PG 19 9669 180895
Castel Ritaldi PG 19 3278 184173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km NW of Foligno (57155 inhabitants)
25 Km SE of Perugia (166134 inhabitants)
48 Km N of Terni (111501 inhabitants)
79 Km NE of Viterbo (67173 inhabitants)
82 Km SE of Arezzo (99543 inhabitants)
94 Km W of Teramo (54892 inhabitants)
94 Km NW of L'Aquila (69753 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
99 Km SW of Fano (60888 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 		Md 0.9
ML 0.1 		2017-11-30
05:20:31		 42.9972 12.6553 8 2017-11-30
21:59:40		 Sala Sismica INGV-Roma 52254591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-11-30 05:20:31 ± 0.17
Latitude 42.9972 ± 0.0054
Longitude 12.6553 ± 0.0086
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 52254591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 822
Semi-minor axis of confidence ellipse (meter) 204
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.20325
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.1

Field Value
Value 0.1
Uncertainty 0.4
Num. used stations 2
Type of magnitude ML
Reference to an origin 52254591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-11-30 21:59:40

Md:0.9

Field Value
Value 0.9
Uncertainty 0.0
Num. used stations 1
Type of magnitude Md
Reference to an origin 52254591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-11-30 21:59:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2017-11-30T05:22:02.73 3.0 undecidable manual Sg 12.25 0
IV.RESU.HHZ. 2017-11-30T05:21:49.06 3.0 positive manual Pn -1.81 0
IV.MUCR.HHZ. 2017-11-30T05:21:47.64 3.0 undecidable manual Pn 0.19 0
IV.MA9.HHZ. 2017-11-30T05:21:25.89 3.0 undecidable manual Sg 1.5 0
IV.SARZ.HHZ. 2017-11-30T05:21:01.38 3.0 negative manual Pg 3.61 0
IV.ORZI.HHZ. 2017-11-30T05:20:56.65 3.0 positive manual Pg 5.08 0
IV.SBPO.HNZ. 2017-11-30T05:20:40.12 3.0 negative manual Pn -0.79 0
IV.T1221.EHZ. 2017-11-30T05:20:39.81 0.3 undecidable manual S 134 21.7671 111 -0.25 71
IV.ATCC.EHE. 2017-11-30T05:20:39.64 0.3 undecidable manual S 357 20.868 112 -0.15 73
IV.CESI.HHZ. 2017-11-30T05:20:39.81 0.3 undecidable manual S 87 20.2686 113 0.23 71
IV.MOMA.HHZ. 2017-11-30T05:20:37.25 1.0 positive manual P 198 22.5552 111 0.46 23
IV.CESI.HHZ. 2017-11-30T05:20:36.36 0.1 undecidable manual P 87 20.2686 113 -0.01 100
IV.T1221.EHZ. 2017-11-30T05:20:36.59 0.1 undecidable manual P 134 21.7671 111 -0.05 99
IV.ATCC.EHE. 2017-11-30T05:20:36.47 0.1 undecidable manual P 357 20.868 112 -0.02 99
IV.ASSB.HHZ. 2017-11-30T05:20:35.35 0.3 undecidable manual S 3 5.0949 149 -0.03 76
IV.ASSB.HHZ. 2017-11-30T05:20:34.06 0.1 undecidable manual P 3 5.0949 149 0.12 100
IV.PII.HHZ. 2017-11-30T05:20:33.39 3.0 negative manual P -8.21 0
GU.POPM.HHZ. 2017-11-30T05:20:32.96 3.0 undecidable manual P -5.54 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:0.0 0.00013225000000000002 0.72 AML other m 2017-11-30T05:20:36.87
IV.CESI.HHN. ML:0.4 0.0000201156465 0.18 AML other m 2017-11-30T05:20:40.58
IV.CESI.HHE. ML:-0.2 0.000006049089999999999 0.18 AML other m 2017-11-30T05:20:39.89
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