Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 19-08-2020 and time 19:41:04 (Italy) in region 2 km E Sant'Anatolia di Narco (PG)

A magnitude ML 0.8 earthquake occured in region: 2 km E Sant'Anatolia di Narco (PG), on

  • 19-08-2020 17:41:04 (UTC)
  • 19-08-2020 19:41:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7300, 12.8660 at 13 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
Sant'Anatolia di Narco PG 3 564 564
Scheggino PG 3 461 1025
Vallo di Nera PG 5 364 1389
Poggiodomo PG 6 117 1506
Spoleto PG 10 38218 39724
Cerreto di Spoleto PG 11 1075 40799
Monteleone di Spoleto PG 11 599 41398
Cascia PG 12 3217 44615
Campello sul Clitunno PG 12 2442 47057
Ferentillo TR 14 1913 48970
Polino TR 16 233 49203
Montefranco TR 17 1276 50479
Arrone TR 18 2763 53242
Sellano PG 18 1079 54321
Castel Ritaldi PG 19 3278 57599
Trevi PG 19 8469 66068
Norcia PG 20 4957 71025

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NE of Terni (111501 inhabitants)
28 Km SE of Foligno (57155 inhabitants)
57 Km SE of Perugia (166134 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
69 Km W of Teramo (54892 inhabitants)
71 Km E of Viterbo (67173 inhabitants)
82 Km N of Guidonia Montecelio (88673 inhabitants)
85 Km N of Tivoli (56533 inhabitants)
98 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
Bulletin
Rev1000 		ML 0.8 2020-08-19
17:41:04		 42.7302 12.8665 13 2020-11-19
12:37:00		 Bollettino Sismico Italiano INGV 82790561
Reviewed
Rev100 		ML 0.9 2020-08-19
17:41:04		 42.7413 12.8675 10 2020-08-19
17:46:54		 Sala Sismica INGV-Roma 82151231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-19 17:41:04 ± 0.05
Latitude 42.7302 ± 0.0027
Longitude 12.8665 ± 0.0037
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 82790561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 66
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 135
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 21
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) 0.34714
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 82151231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-19 17:46:54

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 82790561
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-10 13:08:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRTC.HHZ. 2020-08-19T17:41:37.72 3.0 undecidable manual S -0.21 0
IV.SACS.HHZ. 2020-08-19T17:41:29.11 3.0 undecidable manual S -0.21 0
IV.LPEL.HHZ. 2020-08-19T17:41:26.57 3.0 undecidable manual P 0.54 0
IV.ASSB.HHZ. 2020-08-19T17:41:17.20 0.3 undecidable manual S 334 38.5281 95 -0.08 72
IV.FDMO.HHZ. 2020-08-19T17:41:17.38 0.3 undecidable manual S 28 38.4282 95 0.13 71
IV.CESI.HHN. 2020-08-19T17:41:15.37 0.3 undecidable manual S 6 30.6471 97 0.19 71
IT.GNU.HGZ. 2020-08-19T17:41:14.15 0.3 undecidable manual S 289 25.4523 99 0.33 70
IV.NRCA.HHZ. 2020-08-19T17:41:13.07 0.3 undecidable manual S 60 23.1546 101 -0.15 73
IV.CESX.HHZ. 2020-08-19T17:41:13.99 0.3 undecidable manual S 239 26.5512 98 -0.1 73
IV.MOMA.HHN. 2020-08-19T17:41:13.86 0.3 undecidable manual S 289 25.4523 99 0.04 74
IV.LNSS.HHZ. 2020-08-19T17:41:12.67 0.3 undecidable manual S 135 20.0688 105 0.28 71
IV.ARRO.EHZ. 2020-08-19T17:41:12.06 0.3 undecidable manual S 206 18.6702 107 0.02 75
IV.ASSB.HHZ. 2020-08-19T17:41:11.60 0.6 undecidable manual P 334 38.5281 95 -0.29 46
IV.FDMO.HHZ. 2020-08-19T17:41:11.81 0.3 undecidable manual P 28 38.4282 95 -0.06 72
IT.GNU.HGZ. 2020-08-19T17:41:10.01 0.3 undecidable manual P 289 25.4523 99 0.13 73
IV.CESI.HHN. 2020-08-19T17:41:10.76 0.3 undecidable manual P 6 30.6471 97 0.09 73
IV.FEMA.HNZ. 2020-08-19T17:41:10.26 0.3 undecidable manual P 30 29.748 97 -0.27 70
IV.MOMA.HHN. 2020-08-19T17:41:09.95 0.3 undecidable manual P 289 25.4523 99 0.06 74
IV.LNSS.HHZ. 2020-08-19T17:41:09.30 0.1 undecidable manual P 135 20.0688 105 0.24 96
IV.NRCA.HHZ. 2020-08-19T17:41:09.53 0.1 undecidable manual P 60 23.1546 101 -0.01 100
IV.CESX.HHZ. 2020-08-19T17:41:09.91 0.3 undecidable manual P 239 26.5512 98 -0.13 72
IV.ARRO.EHZ. 2020-08-19T17:41:08.49 0.3 undecidable manual P 206 18.6702 107 -0.37 70
IV.GAVE.EHZ. 2020-08-19T17:41:08.85 0.3 undecidable manual S 152 4.7952 155 -0.33 73
IV.GAVE.EHZ. 2020-08-19T17:41:07.28 0.3 undecidable manual P 152 4.7952 155 0.07 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHN. ML:0.7 0.00003655 0.5 AML other m 2020-08-19T17:41:13.59
IV.NRCA.HHE. ML:0.9 0.00005045 0.1 AML other m 2020-08-19T17:41:13.61
IV.LNSS.HHE. ML:1.0 0.0000585 0.28 AML other m 2020-08-19T17:41:13.76
IV.NRCA.HHN. ML:0.9 0.0000513 0.52 AML other m 2020-08-19T17:41:14.18
IV.ARRO.EHE. ML:0.6 0.0000309 0.2 AML other m 2020-08-19T17:41:14.46
IV.LNSS.HHN. ML:0.8 0.0000431 1.1 AML other m 2020-08-19T17:41:14.98
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