Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 01-10-2020 and time 04:21:50 (Italy) in region 7 km NE Assisi (PG)

A magnitude ML 1.1 earthquake occured in region: 7 km NE Assisi (PG), on

  • 01-10-2020 02:21:50 (UTC)
  • 01-10-2020 04:21:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1200, 12.6670 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Assisi PG 7 28299 28299
Valfabbrica PG 7 3389 31688
Valtopina PG 10 1398 33086
Nocera Umbra PG 10 5839 38925
Bastia Umbra PG 11 21874 60799
Spello PG 14 8645 69444
Cannara PG 15 4305 73749
Gualdo Tadino PG 16 15208 88957
Foligno PG 18 57155 146112
Bettona PG 19 4367 150479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km N of Foligno (57155 inhabitants)
23 Km E of Perugia (166134 inhabitants)
62 Km N of Terni (111501 inhabitants)
74 Km SE of Arezzo (99543 inhabitants)
86 Km SW of Fano (60888 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
90 Km S of Pesaro (94582 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
99 Km NW of Teramo (54892 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 2020-10-01
02:21:50		 43.1197 12.6668 9 2020-10-01
02:41:46		 Sala Sismica INGV-Roma 83406821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-01 02:21:50 ± 0.04
Latitude 43.1197 ± 0.0018
Longitude 12.6668 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83406821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 300.0
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 42
Number of defining phases 42
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.06835
Epicentral distance of station farthest from the epicenter (degree) 0.53060
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 26
Type of magnitude ML
Reference to an origin 83406821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-01 02:41:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2020-10-01T02:22:09.46 0.1 undecidable manual S 114 58.8966 50 0.4 84
IV.NARO.HHZ. 2020-10-01T02:22:08.57 0.1 undecidable manual S 353 54.9006 50 0.56 81
IV.NRCA.HHZ. 2020-10-01T02:22:06.45 0.3 undecidable manual S 131 48.2184 50 0.22 67
IV.FRON.EHZ. 2020-10-01T02:22:05.20 0.1 undecidable manual S 6 44.4222 50 -0.01 94
IV.CSP1.EHZ. 2020-10-01T02:22:05.17 0.1 undecidable manual S 94 43.7229 50 0.16 91
IV.EL6.EHZ. 2020-10-01T02:22:04.80 0.1 undecidable manual S 56 42.1245 50 0.2 91
IV.MOMA.HHE. 2020-10-01T02:22:03.04 0.1 undecidable manual S 193 35.9418 50 0.11 94
IV.FDMO.HHZ. 2020-10-01T02:22:02.52 0.1 undecidable manual S 105 35.3424 50 -0.25 91
IV.TB01.DHZ.01 2020-10-01T02:22:02.48 0.1 undecidable manual S 327 34.5432 50 -0.09 94
IV.SSFR.HHZ. 2020-10-01T02:22:02.86 0.1 undecidable manual S 15 36.3414 50 -0.19 92
IV.ATSC.EHE. 2020-10-01T02:22:02.39 0.1 undecidable manual S 3 33.8439 50 0.01 96
IV.ATVO.HNE. 2020-10-01T02:22:02.76 0.1 undecidable manual S 324 35.9418 50 -0.18 92
IV.MMO1.EHZ. 2020-10-01T02:22:01.10 0.6 negative manual P 114 58.8966 50 -0.07 45
IV.ATLO.HNE. 2020-10-01T02:22:01.13 0.1 undecidable manual S 316 30.1476 106 -0.17 93
IV.NARO.HHZ. 2020-10-01T02:22:00.89 0.6 positive manual P 353 54.9006 50 0.32 43
IV.SNTG.HHN. 2020-10-01T02:21:59.92 0.1 undecidable manual S 56 26.751 108 -0.25 92
IV.MML1.HNE. 2020-10-01T02:21:59.41 0.1 undecidable manual S 91 24.6531 110 -0.08 96
IV.FRON.EHZ. 2020-10-01T02:21:59.01 0.1 undecidable manual P 6 44.4222 50 0.06 93
IV.NRCA.HHZ. 2020-10-01T02:21:59.16 0.1 undecidable manual P 131 48.2184 50 -0.37 87
IV.CESI.HHZ. 2020-10-01T02:21:59.31 0.3 undecidable manual S 123 23.0547 111 0.34 68
IV.MGAB.HNZ. 2020-10-01T02:21:59.99 0.1 undecidable manual P 243 50.5161 50 0.1 91
IV.CSP1.EHZ. 2020-10-01T02:21:58.94 0.1 undecidable manual P 94 43.7229 50 0.11 92
IV.EL6.EHZ. 2020-10-01T02:21:58.44 0.1 undecidable manual P 56 42.1245 50 -0.16 92
IV.MURB.HHZ. 2020-10-01T02:21:58.52 0.3 undecidable manual S 324 19.6692 114 0.66 62
IV.FOSV.EHZ. 2020-10-01T02:21:58.46 0.1 undecidable manual S 21 20.868 113 0.2 94
IV.ATSC.EHE. 2020-10-01T02:21:57.21 0.1 undecidable manual P 3 33.8439 50 -0.1 94
IV.ATVO.HNE. 2020-10-01T02:21:57.46 0.1 undecidable manual P 324 35.9418 50 -0.18 92
IV.FDMO.HHZ. 2020-10-01T02:21:57.24 0.6 negative manual P 105 35.3424 50 -0.3 45
IV.TB01.DHZ.01 2020-10-01T02:21:57.21 0.1 undecidable manual P 327 34.5432 50 -0.22 92
IV.SSFR.HHZ. 2020-10-01T02:21:57.77 1.0 undecidable manual P 15 36.3414 50 0.07 24
IV.MOMA.HHE. 2020-10-01T02:21:57.37 0.1 undecidable manual P 193 35.9418 50 -0.26 91
IV.ATLO.HNE. 2020-10-01T02:21:56.58 0.1 undecidable manual P 316 30.1476 106 -0.11 94
IV.FOSV.EHZ. 2020-10-01T02:21:55.06 0.6 negative manual P 21 20.868 113 0.12 48
IV.CESI.HHZ. 2020-10-01T02:21:55.15 0.1 undecidable manual P 123 23.0547 111 -0.2 94
IV.SNTG.HHN. 2020-10-01T02:21:55.84 0.1 undecidable manual P 56 26.751 108 -0.2 93
IV.MML1.HNE. 2020-10-01T02:21:55.56 0.1 undecidable manual P 91 24.6531 110 -0.09 96
IV.ASSB.HHZ. 2020-10-01T02:21:54.50 0.3 undecidable manual S 184 8.5803 136 -0.16 73
IT.FOPC.HGE. 2020-10-01T02:21:54.64 0.1 undecidable manual P 170 16.872 118 0.43 90
IV.MURB.HHZ. 2020-10-01T02:21:54.92 0.6 positive manual P 324 19.6692 114 0.22 47
IV.ATCC.EHZ. 2020-10-01T02:21:54.38 0.1 undecidable manual S 343 7.5813 139 -0.05 99
IV.ATCC.EHZ. 2020-10-01T02:21:52.75 0.1 undecidable manual P 343 7.5813 139 0.03 100
IV.ASSB.HHZ. 2020-10-01T02:21:52.87 0.1 positive manual P 184 8.5803 136 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHE. ML:1.4 0.00039733425 0.5392 AML other m 2020-10-01T02:21:57.44
IV.ATCC.EHN. ML:1.4 0.0003760816 0.4816 AML other m 2020-10-01T02:21:57.14
IV.ASSB.HHE. ML:1.4 0.00036539895 0.0992 AML other m 2020-10-01T02:21:54.82
IV.ASSB.HHN. ML:1.4 0.0004264539 0.1008 AML other m 2020-10-01T02:21:54.72
IV.MURB.HHE. ML:1.4 0.0001835446 0.24 AML other m 2020-10-01T02:21:59.59
IV.MURB.HHN. ML:1.3 0.00015426005 0.2 AML other m 2020-10-01T02:21:59.95
IV.MURB.HNE. ML:1.3 0.0001616595 0.3296 AML other m 2020-10-01T02:21:59.58
IV.MURB.HNN. ML:1.2 0.00013576614500000002 0.32 AML other m 2020-10-01T02:21:59.04
IV.FOSV.EHE. ML:0.9 0.000056713680000000004 0.2192 AML other m 2020-10-01T02:21:59.14
IV.FOSV.EHN. ML:1.0 0.00006646884 0.3408 AML other m 2020-10-01T02:21:59.57
IV.CESI.HHE. ML:0.9 0.000051691685000000004 0.08 AML other m 2020-10-01T02:22:00.14
IV.CESI.HHN. ML:1.0 0.000066970395 0.12 AML other m 2020-10-01T02:21:59.70
IV.FDMO.HHE. ML:0.8 0.000027455035000000003 0.08 AML other m 2020-10-01T02:22:03.04
IV.FDMO.HHN. ML:1.1 0.00004942793 0.1392 AML other m 2020-10-01T02:22:02.76
IV.SSFR.HHE. ML:1.3 0.00007881107500000001 0.28 AML other m 2020-10-01T02:22:04.37
IV.SSFR.HHN. ML:1.2 0.00005709865999999999 0.1392 AML other m 2020-10-01T02:22:05.21
IV.EL6.EHE. ML:1.1 0.000042614275 0.1792 AML other m 2020-10-01T02:22:05.28
IV.EL6.EHN. ML:1.2 0.000055579122 0.16 AML other m 2020-10-01T02:22:05.45
IV.CSP1.EHE. ML:1.2 0.00004509813 0.1792 AML other m 2020-10-01T02:22:06.37
IV.CSP1.EHN. ML:1.2 0.000057123415 0.2992 AML other m 2020-10-01T02:22:05.51
IV.FRON.EHE. ML:0.7 0.00001568314 0.1392 AML other m 2020-10-01T02:22:06.35
IV.FRON.EHN. ML:0.9 0.000023912975000000005 0.08 AML other m 2020-10-01T02:22:06.81
IV.NRCA.HHE. ML:1.0 0.000026788245000000002 0.24 AML other m 2020-10-01T02:22:08.42
IV.NRCA.HHN. ML:1.2 0.000039122939999999994 0.1408 AML other m 2020-10-01T02:22:07.95
IV.NARO.HHE. ML:0.6 0.0000092525185 0.2 AML other m 2020-10-01T02:22:08.85
IV.NARO.HHN. ML:0.3 0.0000073820225 0.16 AML other m 2020-10-01T02:22:08.95
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