Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 29-09-2020 and time 18:44:59 (Italy) in region 4 km NE Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km NE Norcia (PG), on

  • 29-09-2020 16:44:59 (UTC)
  • 29-09-2020 18:44:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8220, 13.1190 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
Norcia PG 4 4957 4957
Castelsantangelo sul Nera MC 9 281 5238
Preci PG 9 724 5962
Visso MC 13 1107 7069
Ussita MC 14 444 7513
Cascia PG 14 3217 10730
Arquata del Tronto AP 16 1178 11908
Cerreto di Spoleto PG 16 1075 12983
Sellano PG 17 1079 14062
Accumoli RI 18 667 14729
Montegallo AP 18 523 15252
Montemonaco AP 19 604 15856
Poggiodomo PG 19 117 15973

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
51 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
67 Km E of Perugia (166134 inhabitants)
91 Km W of Montesilvano (53738 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
94 Km E of Viterbo (67173 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km N of Tivoli (56533 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 2020-09-29
16:44:59		 42.8217 13.119 10 2020-09-29
16:52:59		 Sala Sismica INGV-Roma 83369531
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-29 16:44:59 ± 0.06
Latitude 42.8217 ± 0.0027
Longitude 13.1190 ± 0.0049
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83369531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 463
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.01259
Epicentral distance of station farthest from the epicenter (degree) 0.40739
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 83369531
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-29 16:52:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-09-29T16:45:14.34 0.3 undecidable manual S 119 45.2214 50 -0.34 67
IV.RM33.EHZ. 2020-09-29T16:45:12.33 0.3 undecidable manual S 167 35.5422 50 0.24 69
IV.CSP1.EHZ. 2020-09-29T16:45:10.77 0.1 undecidable manual S 13 30.747 50 -0.04 97
IV.CESI.HHZ. 2020-09-29T16:45:09.54 0.3 undecidable manual S 319 26.751 50 -0.2 71
IV.SMA1.EHZ. 2020-09-29T16:45:09.92 0.3 undecidable manual S 140 27.5502 50 -0.04 73
IV.MTRA.EHZ. 2020-09-29T16:45:08.52 0.1 undecidable manual S 108 23.754 113 -0.32 93
IV.FDMO.HHZ. 2020-09-29T16:45:08.75 0.3 undecidable manual S 354 23.9538 113 -0.17 72
IV.TERO.HHZ. 2020-09-29T16:45:08.58 0.3 undecidable manual P 119 45.2214 50 0.14 70
IV.LNSS.HHZ. 2020-09-29T16:45:08.94 0.3 undecidable manual S 195 25.0527 112 -0.34 69
IV.MMO1.EHZ. 2020-09-29T16:45:07.20 0.1 undecidable manual S 63 18.9699 118 -0.15 97
IV.FEMA.HNZ. 2020-09-29T16:45:06.58 0.3 undecidable manual S 340 16.5723 121 -0.05 75
IV.CSP1.EHZ. 2020-09-29T16:45:06.22 0.3 undecidable manual P 13 30.747 50 0.01 73
IV.RM33.EHZ. 2020-09-29T16:45:06.91 0.3 undecidable manual P 167 35.5422 50 -0.03 72
IV.SMA1.EHZ. 2020-09-29T16:45:06.01 0.1 undecidable manual P 140 27.5502 50 0.3 93
IV.LNSS.HHZ. 2020-09-29T16:45:05.58 0.3 undecidable manual P 195 25.0527 112 0.26 70
IV.MTRA.EHZ. 2020-09-29T16:45:05.02 0.1 undecidable manual P 108 23.754 113 -0.05 98
IV.MC2.EHZ. 2020-09-29T16:45:05.60 0.1 undecidable manual S 30 11.4774 131 0.41 93
IV.FDMO.HHZ. 2020-09-29T16:45:05.15 0.3 undecidable manual P 354 23.9538 113 0.04 74
IV.CESI.HHZ. 2020-09-29T16:45:05.66 0.1 undecidable manual P 319 26.751 50 0.07 97
IV.MMO1.EHZ. 2020-09-29T16:45:04.31 0.1 undecidable manual P 63 18.9699 118 0.1 98
IV.NRCA.HHZ. 2020-09-29T16:45:03.27 0.1 undecidable manual S 344 1.3986 172 -0.14 100
IV.FEMA.HNZ. 2020-09-29T16:45:03.32 0.1 undecidable manual P 340 16.5723 121 -0.46 91
IV.MC2.EHZ. 2020-09-29T16:45:03.38 0.3 undecidable manual P 30 11.4774 131 0.42 70
IV.NRCA.HHZ. 2020-09-29T16:45:02.23 0.1 undecidable manual P 344 1.3986 172 0.3 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1.4 0.0004395 0.16 AML other m 2020-09-29T16:45:03.40
IV.NRCA.HHN. ML:1.2 0.00027 1.04 AML other m 2020-09-29T16:45:03.93
IV.MTRA.EHN. ML:1.1 0.0000753 1.2 AML other m 2020-09-29T16:45:08.26
IV.MTRA.EHE. ML:1.1 0.0000844 1.8 AML other m 2020-09-29T16:45:08.98
IV.CESI.HHE. ML:0.9 0.0000388 0.22 AML other m 2020-09-29T16:45:10.50
IV.CESI.HHN. ML:1.1 0.00006850000000000001 0.44 AML other m 2020-09-29T16:45:10.18
IV.NRCA.HNE. ML:1.3 0.0003445699 0.0768 AML other m 2020-09-29T16:45:03.40
IV.NRCA.HNN. ML:1.1 0.00022204645 0.0512 AML other m 2020-09-29T16:45:03.82
IV.CSP1.EHE. ML:0.8 0.00002910986 0.4224 AML other m 2020-09-29T16:45:11.35
IV.CSP1.EHN. ML:1.0 0.000045875184999999996 0.4352 AML other m 2020-09-29T16:45:11.03
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