Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 17-09-2020 and time 23:23:43 (UTC) in region 4 km E Sant'Anatolia di Narco (PG)

A magnitude ML 1.3 earthquake occured in region: 4 km E Sant'Anatolia di Narco (PG), on

  • 17-09-2020 23:23:43 (UTC)
  • 18-09-2020 01:23:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7310, 12.8840 at 11 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
Sant'Anatolia di Narco PG 4 564 564
Poggiodomo PG 5 117 681
Vallo di Nera PG 5 364 1045
Scheggino PG 5 461 1506
Cerreto di Spoleto PG 10 1075 2581
Monteleone di Spoleto PG 10 599 3180
Cascia PG 11 3217 6397
Spoleto PG 12 38218 44615
Campello sul Clitunno PG 13 2442 47057
Ferentillo TR 14 1913 48970
Polino TR 17 233 49203
Montefranco TR 18 1276 50479
Sellano PG 18 1079 51558
Norcia PG 18 4957 56515
Arrone TR 19 2763 59278
Trevi PG 20 8469 67747
Leonessa RI 20 2435 70182

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Terni (111501 inhabitants)
29 Km SE of Foligno (57155 inhabitants)
58 Km SE of Perugia (166134 inhabitants)
60 Km NW of L'Aquila (69753 inhabitants)
68 Km W of Teramo (54892 inhabitants)
73 Km E of Viterbo (67173 inhabitants)
82 Km N of Guidonia Montecelio (88673 inhabitants)
86 Km N of Tivoli (56533 inhabitants)
99 Km NE 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
Reviewed
Rev100 		ML 1.3 2020-09-17
23:23:43		 42.7312 12.8843 11 2020-09-17
23:28:49		 Sala Sismica INGV-Roma 82993631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-17 23:23:43 ± 0.03
Latitude 42.7312 ± 0.0018
Longitude 12.8843 ± 0.0024
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82993631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 249
Semi-minor axis of confidence ellipse (meter) 120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 308
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35253
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 82993631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-17 23:28:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.EL6.EHZ. 2020-09-17T23:24:05.91 3.0 undecidable manual S 0.1 0
IV.FDMO.HHZ. 2020-09-17T23:23:56.17 0.3 undecidable manual S 26 37.629 90 0.06 72
IV.EL6.EHZ. 2020-09-17T23:23:55.80 3.0 negative manual P -0.27 0
IV.CESI.HHZ. 2020-09-17T23:23:54.38 0.3 undecidable manual S 3 30.4473 90 0.21 71
IT.FOPC.HGN. 2020-09-17T23:23:54.27 0.6 undecidable manual S 331 30.2475 90 0.13 48
IV.MOMA.HHZ. 2020-09-17T23:23:53.21 0.3 undecidable manual S 288 26.8509 91 -0.01 74
IV.CESX.HHZ. 2020-09-17T23:23:53.31 0.3 undecidable manual S 241 27.8499 91 -0.17 71
IV.CSP1.EHZ. 2020-09-17T23:23:52.58 3.0 negative manual P -0.05 0
IV.LNSS.HHZ. 2020-09-17T23:23:51.27 0.3 undecidable manual S 138 19.0698 91 0.12 74
IV.SMA1.EHZ. 2020-09-17T23:23:51.52 3.0 undecidable manual P 0.28 0
IV.NRCA.HHZ. 2020-09-17T23:23:51.69 0.3 undecidable manual S 59 21.867 91 -0.22 71
IV.MMO1.EHZ. 2020-09-17T23:23:51.27 3.0 positive manual P -0.23 0
IV.ARRO.EHZ. 2020-09-17T23:23:51.25 0.1 undecidable manual S 210 19.4694 91 0 100
IV.ASSB.HHZ. 2020-09-17T23:23:50.95 0.3 undecidable manual P 332 39.1275 90 -0.1 71
IV.FDMO.HHZ. 2020-09-17T23:23:50.77 0.3 undecidable manual P 26 37.629 90 -0.05 71
IV.MOMA.HHZ. 2020-09-17T23:23:49.25 0.3 undecidable manual P 288 26.8509 91 0.09 73
IV.CESX.HHZ. 2020-09-17T23:23:49.18 0.3 undecidable manual P 241 27.8499 91 -0.13 72
IV.CESI.HHZ. 2020-09-17T23:23:49.74 0.3 undecidable manual P 3 30.4473 90 0.04 74
IT.FOPC.HGN. 2020-09-17T23:23:49.65 0.1 undecidable manual P 331 30.2475 90 -0.04 97
IV.ARRO.EHZ. 2020-09-17T23:23:48.08 0.1 positive manual P 210 19.4694 91 0.06 99
IV.NRCA.HHZ. 2020-09-17T23:23:48.37 0.1 undecidable manual P 59 21.867 91 -0.03 98
IV.LNSS.HHZ. 2020-09-17T23:23:47.97 0.3 undecidable manual P 138 19.0698 91 0.01 75
IV.GAVE.EHZ. 2020-09-17T23:23:47.62 0.3 undecidable manual S 170 4.3956 152 -0.15 74
IV.GAVE.EHZ. 2020-09-17T23:23:46.26 0.1 positive manual P 170 4.3956 152 0.25 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:1.9 0.0011949999999999999 0.2 AML other m 2020-09-17T23:23:48.10
IV.GAVE.HNE. ML:2.0 0.0014049999999999998 0.2 AML other m 2020-09-17T23:23:48.10
IV.GAVE.HNN. ML:1.6 0.0006045 0.32 AML other m 2020-09-17T23:23:48.26
IV.GAVE.EHN. ML:2.2 0.0021950000000000003 0.32 AML other m 2020-09-17T23:23:48.26
IV.NRCA.HHE. ML:1.6 0.00023400000000000002 0.1 AML other m 2020-09-17T23:23:51.92
IV.LNSS.HHE. ML:1.3 0.0001375 1.3 AML other m 2020-09-17T23:23:52.79
IV.NRCA.HHN. ML:1.6 0.0002495 0.14 AML other m 2020-09-17T23:23:52.20
IV.LNSS.HHN. ML:1.3 0.0001485 0.48 AML other m 2020-09-17T23:23:52.51
IV.ARRO.EHN. ML:1.0 0.00007345 0.66 AML other m 2020-09-17T23:23:52.56
IV.ARRO.EHE. ML:1.0 0.0000726 0.86 AML other m 2020-09-17T23:23:53.36
IV.MOMA.HHN. ML:1.2 0.0000923 0.18 AML other m 2020-09-17T23:23:53.77
IV.CESX.HHN. ML:1.0 0.000056750000000000004 0.38 AML other m 2020-09-17T23:23:53.71
IV.MOMA.HHE. ML:1.2 0.00009375 1.12 AML other m 2020-09-17T23:23:54.99
IV.CESI.HHN. ML:1.4 0.0001086 0.28 AML other m 2020-09-17T23:23:54.75
IV.CESI.HHE. ML:1.4 0.0001285 0.24 AML other m 2020-09-17T23:23:54.75
IV.FDMO.HHE. ML:1.3 0.00007384999999999999 1.04 AML other m 2020-09-17T23:23:56.60
IV.CESX.HHE. ML:1.1 0.000068 0.46 AML other m 2020-09-17T23:23:56.64
IV.FDMO.HHN. ML:1.2 0.00006145 0.24 AML other m 2020-09-17T23:23:56.86
IV.ASSB.HHE. ML:1.3 0.00007155 0.38 AML other m 2020-09-17T23:23:57.08
IV.ASSB.HHN. ML:1.2 0.00005655 0.78 AML other m 2020-09-17T23:23:57.93
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