Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-08-2019 and time 23:09:57 (Italy) in region 3 km NW Ferentillo (TR)

A magnitude ML 1.6 earthquake occured in region: 3 km NW Ferentillo (TR), on

  • 20-08-2019 21:09:57 (UTC)
  • 20-08-2019 23:09:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6430, 12.7660 at 10 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
Ferentillo TR 3 1913 1913
Montefranco TR 5 1276 3189
Arrone TR 7 2763 5952
Polino TR 9 233 6185
Scheggino PG 10 461 6646
Spoleto PG 11 38218 44864
Sant'Anatolia di Narco PG 12 564 45428
Labro RI 13 374 45802
Terni TR 13 111501 157303
Morro Reatino RI 14 373 157676
Monteleone di Spoleto PG 15 599 158275
Rivodutri RI 16 1253 159528
Colli sul Velino RI 16 533 160061
Poggiodomo PG 16 117 160178
Vallo di Nera PG 16 364 160542
Stroncone TR 18 4917 165459
San Gemini TR 18 5018 170477
Poggio Bustone RI 18 2055 172532
Leonessa RI 19 2435 174967
Acquasparta TR 19 4778 179745
Campello sul Clitunno PG 20 2442 182187

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NE of Terni (111501 inhabitants)
35 Km S of Foligno (57155 inhabitants)
60 Km E of Viterbo (67173 inhabitants)
60 Km SE of Perugia (166134 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
71 Km N of Guidonia Montecelio (88673 inhabitants)
76 Km N of Tivoli (56533 inhabitants)
77 Km W of Teramo (54892 inhabitants)
87 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 1.6 2019-08-20
21:09:57		 42.6428 12.7663 10 2019-11-13
14:31:04		 Bollettino Sismico Italiano INGV 73036421
Reviewed
Rev100 		ML 1.6 2019-08-20
21:09:57		 42.6422 12.7665 9 2019-08-20
21:19:16		 Sala Sismica INGV-Roma 71663381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 21:09:57 ± 0.04
Latitude 42.6428 ± 0.0018
Longitude 12.7663 ± 0.0024
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73036421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 243
Semi-minor axis of confidence ellipse (meter) 229
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 50
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.06385
Epicentral distance of station farthest from the epicenter (degree) 0.72845
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 29
Type of magnitude ML
Reference to an origin 73036421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-04 09:08:00

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 71663381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 21:19:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2019-08-20T21:10:14.12 0.3 undecidable manual S 31 50.9157 50 0.15 68
IV.MMO1.EHZ. 2019-08-20T21:10:14.95 0.6 undecidable manual S 58 53.8017 50 0.21 45
IV.SRES.HHE. 2019-08-20T21:10:13.89 0.3 undecidable manual S 205 49.7169 50 0.25 67
IV.FIAM.HHZ. 2019-08-20T21:10:13.56 0.3 undecidable manual S 145 50.5161 50 -0.31 66
IV.ASSB.HHZ. 2019-08-20T21:10:12.19 0.6 undecidable manual S 349 45.2214 50 -0.26 45
IV.MC2.EHZ. 2019-08-20T21:10:12.58 0.6 undecidable manual S 49 45.5211 50 0.05 47
IV.SMA1.EHZ. 2019-08-20T21:10:12.89 0.6 undecidable manual S 91 46.4202 50 0.11 46
IV.EL6.EHZ. 2019-08-20T21:10:11.89 0.6 undecidable manual P 20 80.8635 50 0.22 43
IV.FEMA.HNE. 2019-08-20T21:10:11.88 0.3 undecidable manual S 33 42.2244 50 0.22 69
IV.CESI.HHE. 2019-08-20T21:10:11.68 0.3 undecidable manual S 16 41.7249 50 0.16 69
IV.RM33.EHZ. 2019-08-20T21:10:10.77 0.3 undecidable manual S 112 39.5271 50 -0.15 70
IV.NRCA.HHZ. 2019-08-20T21:10:09.40 0.3 undecidable manual S 53 35.3424 50 -0.43 66
IV.MGAB.HHZ. 2019-08-20T21:10:08.87 0.6 undecidable manual P 300 61.0944 50 0.24 44
IV.SRES.HHE. 2019-08-20T21:10:07.00 0.6 undecidable manual P 205 49.7169 50 0.14 46
IV.MMO1.EHZ. 2019-08-20T21:10:07.43 0.6 undecidable manual P 58 53.8017 50 -0.07 46
IV.MML1.HNE. 2019-08-20T21:10:07.75 0.6 undecidable manual P 18 54.8007 50 0.09 46
IV.FDMO.HHZ. 2019-08-20T21:10:07.00 0.6 undecidable manual P 31 50.9157 50 -0.05 47
IV.SMA1.EHZ. 2019-08-20T21:10:06.35 0.6 undecidable manual P 91 46.4202 50 -0.02 47
IV.FIAM.HHZ. 2019-08-20T21:10:06.73 0.3 undecidable manual P 145 50.5161 50 -0.27 67
IT.MTCL.HGZ. 2019-08-20T21:10:06.03 0.6 undecidable manual P 26 43.3233 50 0.14 46
IT.GNU.HGZ. 2019-08-20T21:10:06.45 0.3 undecidable manual S 318 23.9538 112 -0.12 72
IV.MC2.EHZ. 2019-08-20T21:10:06.56 0.6 undecidable manual P 49 45.5211 50 0.34 44
IV.MOMA.HHZ. 2019-08-20T21:10:06.31 0.3 undecidable manual S 318 23.9538 112 -0.27 70
IV.RM33.EHZ. 2019-08-20T21:10:05.19 0.3 undecidable manual P 112 39.5271 50 -0.11 70
IV.T1299.HNN. 2019-08-20T21:10:05.79 0.6 undecidable manual P 91 42.1245 50 0.09 47
IV.LNSS.HHZ. 2019-08-20T21:10:05.87 0.3 undecidable manual S 101 22.755 113 -0.34 69
IV.CESI.HHE. 2019-08-20T21:10:05.66 0.3 undecidable manual P 16 41.7249 50 0.02 72
IV.ASSB.HHZ. 2019-08-20T21:10:05.99 0.1 undecidable manual P 349 45.2214 50 -0.18 92
IV.FEMA.HNE. 2019-08-20T21:10:05.93 0.6 undecidable manual P 33 42.2244 50 0.2 46
IV.NRCA.HHZ. 2019-08-20T21:10:04.61 0.1 undecidable manual P 53 35.3424 50 -0.05 96
IV.CESX.HHZ. 2019-08-20T21:10:03.41 0.6 undecidable manual S 255 15.1737 123 -0.44 46
IV.MOMA.HHZ. 2019-08-20T21:10:02.70 0.3 undecidable manual P 318 23.9538 112 -0.09 73
IV.GAVE.EHZ. 2019-08-20T21:10:02.95 0.3 undecidable manual S 62 11.7771 129 0.06 75
IV.LNSS.HHZ. 2019-08-20T21:10:02.57 0.1 undecidable manual P 101 22.755 113 0 99
IT.GNU.HGZ. 2019-08-20T21:10:02.81 0.3 undecidable manual P 318 23.9538 112 0.03 74
IV.CESX.HHZ. 2019-08-20T21:10:01.31 0.1 undecidable manual P 255 15.1737 123 0.1 98
IV.ARRO.EHZ. 2019-08-20T21:10:01.84 0.1 undecidable manual S 180 7.0929 144 0.08 100
IV.ARRO.EHZ. 2019-08-20T21:10:00.36 0.1 negative manual P 180 7.0929 144 0.35 95
IV.GAVE.EHZ. 2019-08-20T21:10:00.83 0.1 undecidable manual P 62 11.7771 129 0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARRO.EHE. ML:2.1 0.00183 0.16 AML other m 2019-08-20T21:10:02.12
IV.ARRO.EHN. ML:1.7 0.0008900000000000001 0.16 AML other m 2019-08-20T21:10:02.27
IV.GAVE.HNE. ML:1.8 0.0008115 0.6 AML other m 2019-08-20T21:10:04.81
IV.GAVE.EHE. ML:1.8 0.0007664999999999999 1.5 AML other m 2019-08-20T21:10:04.82
IV.GAVE.HNN. ML:1.4 0.00033199999999999994 1.16 AML other m 2019-08-20T21:10:05.83
IV.GAVE.EHN. ML:1.7 0.0005549999999999999 1.18 AML other m 2019-08-20T21:10:05.84
IV.CESX.HHN. ML:1.8 0.0006464999999999999 0.36 AML other m 2019-08-20T21:10:05.39
IV.CESX.HHE. ML:1.7 0.000456 0.42 AML other m 2019-08-20T21:10:05.69
IV.LNSS.HHE. ML:1.8 0.0004545 0.82 AML other m 2019-08-20T21:10:06.87
IV.LNSS.HNE. ML:1.7 0.00034849775000000006 0.1664 AML other m 2019-08-20T21:10:06.65
IV.LNSS.HHN. ML:1.7 0.00033099999999999997 0.2 AML other m 2019-08-20T21:10:06.71
IV.LNSS.HNN. ML:1.7 0.00029407649999999995 0.1152 AML other m 2019-08-20T21:10:06.71
IV.MOMA.HHN. ML:1.4 0.00016849999999999998 0.36 AML other m 2019-08-20T21:10:07.37
IV.MOMA.HHE. ML:1.4 0.0001555 0.66 AML other m 2019-08-20T21:10:08.06
IV.MOMA.HNE. ML:1.4 0.00013916455 0.192 AML other m 2019-08-20T21:10:10.14
IV.RM33.HNN. ML:1.8 0.0002177713 0.3072 AML other m 2019-08-20T21:10:11.74
IV.RM33.EHN. ML:1.8 0.00021500000000000002 1.08 AML other m 2019-08-20T21:10:11.05
IV.RM33.HNE. ML:1.7 0.00017071205 0.1536 AML other m 2019-08-20T21:10:12.10
IV.RM33.EHE. ML:1.7 0.000175 1.68 AML other m 2019-08-20T21:10:12.10
IV.ASSB.HHN. ML:1.2 0.00004815 0.86 AML other m 2019-08-20T21:10:13.05
IV.SMA1.EHE. ML:1.8 0.0001905 0.26 AML other m 2019-08-20T21:10:13.68
IV.ASSB.HHE. ML:1.2 0.0000461 0.5 AML other m 2019-08-20T21:10:13.99
IV.FDMO.HHE. ML:1.5 0.00008599999999999999 0.98 AML other m 2019-08-20T21:10:14.57
IV.FDMO.HHN. ML:1.4 0.0000591 0.56 AML other m 2019-08-20T21:10:15.23
IV.SMA1.EHN. ML:1.6 0.000121 0.52 AML other m 2019-08-20T21:10:15.96
IV.MGAB.HHN. ML:1.2 0.0000331 0.2 AML other m 2019-08-20T21:10:19.15
IV.MGAB.HHE. ML:1.4 0.000046 1.64 AML other m 2019-08-20T21:10:19.00
IV.EL6.EHE. ML:1.7 0.00007018434 0.1664 AML other m 2019-08-20T21:10:24.33
IV.EL6.EHN. ML:1.6 0.000052917779999999995 0.32 AML other m 2019-08-20T21:10:24.55
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