Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 05-10-2020 and time 12:27:05 (UTC) in region 1 km NE Spoleto (PG)

A magnitude ML 1.7 earthquake occured in region: 1 km NE Spoleto (PG), on

  • 05-10-2020 12:27:05 (UTC)
  • 05-10-2020 14:27:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7430, 12.7520 at 8 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Spoleto PG 1 38218 38218
Sant'Anatolia di Narco PG 7 564 38782
Scheggino PG 7 461 39243
Campello sul Clitunno PG 9 2442 41685
Vallo di Nera PG 10 364 42049
Castel Ritaldi PG 11 3278 45327
Ferentillo TR 14 1913 47240
Trevi PG 15 8469 55709
Poggiodomo PG 15 117 55826
Cerreto di Spoleto PG 16 1075 56901
Montefranco TR 16 1276 58177
Giano dell'Umbria PG 18 3846 62023
Arrone TR 18 2763 64786
Acquasparta TR 18 4778 69564
Montefalco PG 19 5679 75243
Polino TR 19 233 75476
Massa Martana PG 19 3770 79246
Monteleone di Spoleto PG 19 599 79845

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Terni (111501 inhabitants)
24 Km S of Foligno (57155 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
64 Km NE of Viterbo (67173 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
87 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 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
Bulletin
Rev1000 		ML 1.7 2020-10-05
12:27:05		 42.7427 12.7523 8 2021-02-26
14:56:05		 Bollettino Sismico Italiano INGV 84647221
Reviewed
Rev100 		ML 1.7 2020-10-05
12:27:05		 42.7398 12.7495 8 2020-10-05
12:35:01		 Sala Sismica INGV-Roma 83524571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-05 12:27:05 ± 0.04
Latitude 42.7427 ± 0.0018
Longitude 12.7523 ± 0.0024
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84647221

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 219
Semi-minor axis of confidence ellipse (meter) 206
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 339
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54499
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 84647221
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-11 17:32:31

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 83524571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-05 12:35:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2020-10-05T12:27:22.70 0.3 undecidable manual S 43 53.4021 50 0.2 68
IV.SMA1.EHZ. 2020-10-05T12:27:21.67 0.3 undecidable manual S 104 49.1175 50 0.31 67
IV.RM33.EHZ. 2020-10-05T12:27:20.46 0.6 undecidable manual S 124 45.8208 50 0 48
IV.MC2.EHZ. 2020-10-05T12:27:19.24 0.3 undecidable manual S 62 40.1265 50 0.28 69
IV.FDMO.HHZ. 2020-10-05T12:27:19.59 0.3 undecidable manual S 40 42.4242 50 0.01 72
IV.ASSB.HHN. 2020-10-05T12:27:17.27 0.3 undecidable manual S 347 34.1436 103 -0.02 73
IV.NRCA.HHZ. 2020-10-05T12:27:16.20 0.3 undecidable manual S 71 31.1466 105 -0.08 73
IV.CESI.HHZ. 2020-10-05T12:27:16.56 0.3 undecidable manual S 23 31.6461 104 0.12 72
IV.LNSS.HHZ. 2020-10-05T12:27:15.10 0.3 undecidable manual S 123 28.1496 106 -0.18 72
IV.CSP1.EHZ. 2020-10-05T12:27:15.07 0.1 undecidable manual P 43 53.4021 50 -0.08 93
IV.FIAM.HHZ. 2020-10-05T12:27:15.83 0.6 undecidable manual P 150 60.495 50 -0.42 43
IV.ARVD.HHZ. 2020-10-05T12:27:14.26 3.0 undecidable manual P -1.47 0
IV.SMA1.EHZ. 2020-10-05T12:27:14.40 0.1 undecidable manual P 104 49.1175 50 -0.09 94
IV.RM33.EHZ. 2020-10-05T12:27:13.84 0.6 undecidable manual P 124 45.8208 50 -0.14 47
IV.MML1.HNE. 2020-10-05T12:27:13.69 0.6 undecidable manual P 23 44.8218 50 -0.14 47
IV.MC2.EHZ. 2020-10-05T12:27:13.05 0.1 undecidable manual P 62 40.1265 50 -0.06 96
IV.FDMO.HHZ. 2020-10-05T12:27:13.45 0.1 undecidable manual P 40 42.4242 50 -0.02 96
IV.ASSB.HHN. 2020-10-05T12:27:12.14 0.3 undecidable manual P 347 34.1436 103 0 73
IV.ARRO.EHZ. 2020-10-05T12:27:12.46 0.3 undecidable manual S 177 18.1707 114 0.44 69
IV.CESX.HHZ. 2020-10-05T12:27:12.53 0.3 undecidable manual S 222 20.0688 112 -0.1 74
IV.CESI.HHZ. 2020-10-05T12:27:11.54 0.1 positive manual P 23 31.6461 104 -0.12 96
IT.GNU.HGE. 2020-10-05T12:27:11.91 0.6 undecidable manual S 295 16.2726 116 0.48 46
IV.MOMA.HHZ. 2020-10-05T12:27:11.36 0.3 undecidable manual S 295 16.3725 116 -0.08 75
IV.NRCA.HHZ. 2020-10-05T12:27:11.36 0.1 negative manual P 71 31.1466 105 -0.2 95
IV.GAVE.EHZ. 2020-10-05T12:27:10.56 0.3 undecidable manual S 116 12.876 122 0.18 74
IV.LNSS.HHZ. 2020-10-05T12:27:10.76 0.1 negative manual P 123 28.1496 106 -0.22 95
IV.ARRO.EHZ. 2020-10-05T12:27:09.20 0.1 positive manual P 177 18.1707 114 0.1 99
IV.CESX.HHZ. 2020-10-05T12:27:09.29 0.1 undecidable manual P 222 20.0688 112 -0.17 97
IV.GAVE.EHZ. 2020-10-05T12:27:08.26 0.1 negative manual P 116 12.876 122 0.1 100
IT.GNU.HGE. 2020-10-05T12:27:08.86 0.3 undecidable manual P 295 16.2726 116 0.1 74
IV.MOMA.HHZ. 2020-10-05T12:27:08.71 0.1 negative manual P 295 16.3725 116 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.8 0.0007717273 0.16 AML other m 2020-10-05T12:27:11.45
IV.GAVE.EHE. ML:1.9 0.0009517758 0.2176 AML other m 2020-10-05T12:27:12.41
IV.GAVE.HNN. ML:1.4 0.00026384760000000004 0.2624 AML other m 2020-10-05T12:27:13.41
IV.GAVE.HNE. ML:1.9 0.0009815612 0.2176 AML other m 2020-10-05T12:27:12.40
IV.MOMA.HNE. ML:1.6 0.00033446295000000005 0.1984 AML other m 2020-10-05T12:27:12.47
IV.MOMA.HHE. ML:1.5 0.0003269737 0.2048 AML other m 2020-10-05T12:27:12.47
IV.MOMA.HHN. ML:1.6 0.0003722025 0.2624 AML other m 2020-10-05T12:27:12.69
IV.MOMA.HNN. ML:1.6 0.0003687532 0.2624 AML other m 2020-10-05T12:27:12.69
IV.CESX.HHN. ML:1.7 0.00037482855 0.2368 AML other m 2020-10-05T12:27:14.90
IV.CESX.HHE. ML:1.9 0.0005622155 0.6656 AML other m 2020-10-05T12:27:14.38
IV.LNSS.HNE. ML:1.9 0.00042416370000000005 0.2624 AML other m 2020-10-05T12:27:17.76
IV.LNSS.HHE. ML:1.9 0.0004098081 0.2624 AML other m 2020-10-05T12:27:17.75
IV.LNSS.HHN. ML:1.9 0.0004044508 0.3392 AML other m 2020-10-05T12:27:17.88
IV.NRCA.HHN. ML:1.7 0.00024146695000000002 0.1216 AML other m 2020-10-05T12:27:16.84
IV.NRCA.HNE. ML:1.6 0.0002070283625 0.4416 AML other m 2020-10-05T12:27:19.91
IV.NRCA.HHE. ML:1.6 0.00017296645 0.1408 AML other m 2020-10-05T12:27:17.55
IV.NRCA.HNN. ML:1.7 0.00025278255 0.128 AML other m 2020-10-05T12:27:16.84
IV.CESI.HHN. ML:1.6 0.0001904257 0.3776 AML other m 2020-10-05T12:27:17.70
IV.CESI.HNN. ML:1.7 0.00021038394499999999 0.32 AML other m 2020-10-05T12:27:19.75
IV.CESI.HHE. ML:1.3 0.00010156367499999999 0.16 AML other m 2020-10-05T12:27:17.56
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