Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 28-08-2020 and time 23:52:29 (Italy) in region 3 km S Trevi (PG)

A magnitude ML 1.9 earthquake occured in region: 3 km S Trevi (PG), on

  • 28-08-2020 21:52:29 (UTC)
  • 28-08-2020 23:52:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8550, 12.7490 at 9 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
Trevi PG 3 8469 8469
Campello sul Clitunno PG 5 2442 10911
Castel Ritaldi PG 7 3278 14189
Montefalco PG 9 5679 19868
Foligno PG 12 57155 77023
Spoleto PG 13 38218 115241
Vallo di Nera PG 13 364 115605
Giano dell'Umbria PG 14 3846 119451
Cerreto di Spoleto PG 14 1075 120526
Bevagna PG 14 5081 125607
Sellano PG 15 1079 126686
Sant'Anatolia di Narco PG 15 564 127250
Spello PG 17 8645 135895
Gualdo Cattaneo PG 17 6155 142050
Scheggino PG 17 461 142511

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SE of Foligno (57155 inhabitants)
34 Km N of Terni (111501 inhabitants)
41 Km SE of Perugia (166134 inhabitants)
72 Km NE of Viterbo (67173 inhabitants)
77 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
98 Km SE of Arezzo (99543 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
Bulletin
Rev1000 		ML 1.9 2020-08-28
21:52:29		 42.855 12.7487 9 2020-11-19
12:37:04		 Bollettino Sismico Italiano INGV 83847291
Reviewed
Rev100 		ML 1.8 2020-08-28
21:52:29		 42.8538 12.7492 9 2020-08-28
22:06:38		 Sala Sismica INGV-Roma 82419481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-28 21:52:29 ± 0.04
Latitude 42.8550 ± 0.0027
Longitude 12.7487 ± 0.0037
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83847291

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 257
Semi-minor axis of confidence ellipse (meter) 249
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 310
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.11961
Epicentral distance of station farthest from the epicenter (degree) 0.74194
Number of stations at which the event was observed 30
Number of stations from which data was used for origin computation 30
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 45
Type of magnitude ML
Reference to an origin 82419481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-28 22:06:38

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 57
Type of magnitude ML
Reference to an origin 83847291
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-17 11:11:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1299.HNN. 2020-08-28T21:52:45.79 0.6 undecidable manual S 119 49.9167 50 0.45 46
IV.CAFI.HHZ. 2020-08-28T21:52:44.05 0.3 undecidable manual P 310 82.3509 50 0.53 63
IV.TERO.HHZ. 2020-08-28T21:52:42.75 0.3 undecidable manual P 110 74.2701 50 0.47 65
IV.SEF1.HNN. 2020-08-28T21:52:41.53 1.0 undecidable manual P 26 36.1416 50 5.13 1
IV.FIAM.HHZ. 2020-08-28T21:52:41.63 0.3 undecidable manual P 155 71.7726 50 -0.25 69
IV.LNSS.HHZ. 2020-08-28T21:52:41.72 0.6 undecidable manual S 140 36.741 50 -0.1 50
IV.MF5.EHZ. 2020-08-28T21:52:40.23 0.3 undecidable manual P 75 59.5959 50 0.21 71
IV.ARRO.EHZ. 2020-08-28T21:52:40.42 0.6 undecidable manual S 177 30.6471 50 0.23 50
IV.FDMO.HHZ. 2020-08-28T21:52:40.81 0.6 undecidable manual S 54 34.0437 50 -0.31 49
IV.MML1.HNE. 2020-08-28T21:52:40.90 0.6 undecidable manual S 32 33.9438 50 -0.17 50
IV.NRCA.HHZ. 2020-08-28T21:52:39.76 0.6 undecidable manual S 94 29.8479 50 -0.23 50
IV.MGAB.HHZ. 2020-08-28T21:52:39.14 0.3 undecidable manual P 277 52.1034 50 0.28 71
IV.GUMA.HHZ. 2020-08-28T21:52:39.34 0.3 undecidable manual P 64 52.9026 50 0.36 69
IV.FEMA.HNZ. 2020-08-28T21:52:39.16 0.6 undecidable manual S 64 27.1506 109 -0.03 52
IV.MTRA.EHZ. 2020-08-28T21:52:39.12 0.3 undecidable manual P 101 53.8017 50 -0.01 75
IV.CESX.HHZ. 2020-08-28T21:52:39.77 0.6 undecidable manual S 206 30.3474 50 -0.35 48
IV.SMA1.EHZ. 2020-08-28T21:52:39.27 0.3 undecidable manual P 117 53.9016 50 0.14 73
IV.RM33.EHZ. 2020-08-28T21:52:39.06 0.3 undecidable manual P 135 54.0015 50 -0.09 73
IV.T1299.HNN. 2020-08-28T21:52:38.54 0.1 undecidable manual P 119 49.9167 50 0.02 100
IT.MTCL.HGZ. 2020-08-28T21:52:38.44 0.6 undecidable manual S 53 25.5522 110 -0.2 50
IV.FOSV.EHZ. 2020-08-28T21:52:38.22 0.3 undecidable manual P 1 48.8178 50 -0.13 74
IV.MURB.HHE. 2020-08-28T21:52:38.78 1.0 undecidable manual P 338 48.8178 50 0.44 23
IV.MMO1.EHZ. 2020-08-28T21:52:38.11 0.3 undecidable manual P 84 47.2194 50 0 76
IV.GAVE.EHZ. 2020-08-28T21:52:37.43 0.6 undecidable manual S 147 21.5673 114 0.06 52
IV.CESI.HHZ. 2020-08-28T21:52:37.13 0.6 undecidable manual S 37 20.868 114 -0.02 53
IV.ASSB.HHZ. 2020-08-28T21:52:37.49 0.6 undecidable manual S 341 22.0668 113 -0.03 53
IV.MC2.EHZ. 2020-08-28T21:52:36.58 0.3 undecidable manual P 80 36.3414 50 0.15 75
IV.LNSS.HHZ. 2020-08-28T21:52:36.30 0.3 undecidable manual P 140 36.741 50 -0.19 74
IV.ATCC.EHZ. 2020-08-28T21:52:36.52 0.3 undecidable manual P 347 37.629 50 -0.11 75
IV.MOMA.HHZ. 2020-08-28T21:52:35.38 0.6 undecidable manual S 249 15.5733 121 -0.13 52
IV.CESX.HHZ. 2020-08-28T21:52:35.19 0.3 undecidable manual P 206 30.3474 50 -0.32 73
IV.MML1.HNE. 2020-08-28T21:52:35.76 0.1 positive manual P 32 33.9438 50 -0.29 97
IT.GNU.HGZ. 2020-08-28T21:52:35.36 0.6 undecidable manual S 249 15.5733 121 -0.16 52
IV.NRCA.HHZ. 2020-08-28T21:52:35.26 0.3 undecidable manual P 94 29.8479 50 -0.17 75
IV.ARRO.EHZ. 2020-08-28T21:52:35.52 0.3 undecidable manual P 177 30.6471 50 -0.02 78
IT.FOPC.HGZ. 2020-08-28T21:52:35.07 0.6 undecidable manual S 344 13.2756 125 0.23 51
IV.FEMA.HNZ. 2020-08-28T21:52:35.09 0.3 undecidable manual P 64 27.1506 109 0.13 76
IV.FDMO.HHZ. 2020-08-28T21:52:35.95 0.3 undecidable manual P 54 34.0437 50 -0.13 76
IT.MTCL.HGZ. 2020-08-28T21:52:34.59 0.3 undecidable manual P 53 25.5522 110 -0.06 78
IV.ASSB.HHZ. 2020-08-28T21:52:33.94 0.3 undecidable manual P 341 22.0668 113 -0.06 78
IV.GAVE.EHZ. 2020-08-28T21:52:33.95 0.3 undecidable manual P 147 21.5673 114 0.04 79
IV.CESI.HHZ. 2020-08-28T21:52:33.91 0.3 undecidable manual P 37 20.868 114 0.12 77
IT.FOPC.HGZ. 2020-08-28T21:52:32.20 0.3 undecidable manual P 344 13.2756 125 -0.25 76
IV.MOMA.HHZ. 2020-08-28T21:52:32.90 0.3 undecidable manual P 249 15.5733 121 0.05 79
IT.GNU.HGZ. 2020-08-28T21:52:32.96 0.3 undecidable manual P 249 15.5733 121 0.12 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:2.0 0.0010718665999999999 0.1536 AML other m 2020-08-28T21:52:35.81
IV.MOMA.HHN. ML:2.1 0.0011155805 0.2176 AML other m 2020-08-28T21:52:36.21
IV.MOMA.HNE. ML:2.2 0.0015800615 0.1536 AML other m 2020-08-28T21:52:36.24
IV.MOMA.HHE. ML:2.2 0.0016545499999999999 0.1408 AML other m 2020-08-28T21:52:36.26
IV.CESI.HHN. ML:1.8 0.00049363095 0.2816 AML other m 2020-08-28T21:52:37.24
IV.CESI.HNN. ML:1.8 0.0004468583 0.3072 AML other m 2020-08-28T21:52:37.24
IV.CESI.HNE. ML:1.5 0.00024656165 0.2176 AML other m 2020-08-28T21:52:37.57
IV.CESI.HHE. ML:1.6 0.00027032735 0.2176 AML other m 2020-08-28T21:52:37.57
IV.GAVE.HNN. ML:1.6 0.0002512324 0.2816 AML other m 2020-08-28T21:52:38.36
IV.GAVE.HNE. ML:2.1 0.0008658022000000001 0.1664 AML other m 2020-08-28T21:52:39.51
IV.GAVE.EHE. ML:2.1 0.00080862855 0.1792 AML other m 2020-08-28T21:52:39.51
IV.GAVE.EHN. ML:2.0 0.00069913225 0.1408 AML other m 2020-08-28T21:52:39.82
IV.NRCA.HHN. ML:2.0 0.00053918835 1.8976 AML other m 2020-08-28T21:52:40.00
IV.NRCA.HNN. ML:2.0 0.0005254844 0.1408 AML other m 2020-08-28T21:52:40.45
IV.FDMO.HHE. ML:1.6 0.00016656745 1.7696 AML other m 2020-08-28T21:52:40.94
IV.ARRO.EHE. ML:1.7 0.00021841765000000002 0.2304 AML other m 2020-08-28T21:52:40.98
IV.ARRO.EHN. ML:1.5 0.00014433865 0.1792 AML other m 2020-08-28T21:52:41.34
IV.CESX.HHN. ML:2.1 0.0006152158000000001 0.32 AML other m 2020-08-28T21:52:41.74
IV.NRCA.HHE. ML:2.1 0.0006455555500000001 0.128 AML other m 2020-08-28T21:52:41.78
IV.NRCA.HNE. ML:2.0 0.00057783315 0.1152 AML other m 2020-08-28T21:52:41.79
IV.CESX.HHE. ML:1.8 0.00030049325 0.3712 AML other m 2020-08-28T21:52:41.78
IV.LNSS.HNN. ML:1.9 0.0003191326 0.2048 AML other m 2020-08-28T21:52:42.32
IV.FDMO.HHN. ML:1.6 0.00017509985 0.1408 AML other m 2020-08-28T21:52:42.27
IV.LNSS.HHE. ML:2.1 0.00045419129999999994 0.1024 AML other m 2020-08-28T21:52:42.66
IV.ATCC.EHE. ML:2.0 0.0003636821 1.7568 AML other m 2020-08-28T21:52:42.06
IV.LNSS.HNE. ML:2.0 0.0004029667 0.128 AML other m 2020-08-28T21:52:43.37
IV.ATCC.EHN. ML:1.9 0.00031161365000000003 0.2176 AML other m 2020-08-28T21:52:43.31
IV.LNSS.HHN. ML:2.0 0.00035643705000000005 0.2048 AML other m 2020-08-28T21:52:44.65
IV.FOSV.EHE. ML:1.6 0.000101772115 0.4224 AML other m 2020-08-28T21:52:46.18
IV.FOSV.EHN. ML:1.6 0.000097134505 0.3712 AML other m 2020-08-28T21:52:46.66
IV.MGAB.HHE. ML:1.6 0.00010885418999999998 0.1792 AML other m 2020-08-28T21:52:47.17
IV.GUMA.HHE. ML:2.5 0.00082791485 0.2432 AML other m 2020-08-28T21:52:47.35
IV.GUMA.HNE. ML:2.4 0.0005590286 0.2816 AML other m 2020-08-28T21:52:47.49
IV.MTRA.EHN. ML:1.9 0.00020432205 0.2304 AML other m 2020-08-28T21:52:47.77
IV.RM33.EHE. ML:1.7 0.0001252568 0.1408 AML other m 2020-08-28T21:52:47.87
IV.RM33.HNE. ML:1.9 0.00017278745 0.2688 AML other m 2020-08-28T21:52:48.01
IV.GUMA.HHN. ML:2.2 0.00043326180000000005 0.2432 AML other m 2020-08-28T21:52:48.04
IV.RM33.EHN. ML:1.5 0.000074671725 0.1024 AML other m 2020-08-28T21:52:48.19
IV.MTRA.HNE. ML:2.1 0.00027003105 0.128 AML other m 2020-08-28T21:52:48.27
IV.MTRA.EHE. ML:2.0 0.0002609024 0.128 AML other m 2020-08-28T21:52:48.27
IV.MTRA.HNN. ML:2.0 0.00020750950000000002 0.2176 AML other m 2020-08-28T21:52:48.38
IV.MGAB.HHN. ML:1.8 0.00016315125 0.3456 AML other m 2020-08-28T21:52:49.04
IV.MGAB.HNN. ML:1.8 0.000174925 1.7312 AML other m 2020-08-28T21:52:49.92
IV.SMA1.EHE. ML:1.8 0.00014086760000000002 0.2816 AML other m 2020-08-28T21:52:49.75
IV.MF5.EHN. ML:1.7 0.0001112503 0.3968 AML other m 2020-08-28T21:52:49.86
IV.MF5.EHE. ML:1.8 0.00014017754000000002 1.7568 AML other m 2020-08-28T21:52:50.02
IV.MGAB.HNE. ML:1.9 0.00019093965 0.4864 AML other m 2020-08-28T21:52:50.39
IV.SMA1.EHN. ML:1.8 0.00014873084999999999 0.4224 AML other m 2020-08-28T21:52:50.55
IV.FIAM.HNN. ML:1.8 0.00011499256 1.3728 AML other m 2020-08-28T21:52:51.90
IV.TERO.HNE. ML:1.8 0.00010553072000000001 1.5648 AML other m 2020-08-28T21:52:52.17
IV.FIAM.HNE. ML:3.2 0.0026305925 1.1904 AML other m 2020-08-28T21:52:52.38
IV.TERO.HHN. ML:1.5 0.00005150973 1.9232 AML other m 2020-08-28T21:52:54.96
IV.FIAM.HHN. ML:1.1 0.0000177 0.26 AML other m 2020-08-28T21:52:55.21
IV.TERO.HHE. ML:1.5 0.000048153754999999996 0.2304 AML other m 2020-08-28T21:52:56.40
IV.CAFI.HHE. ML:1.4 0.000029346589999999997 0.4608 AML other m 2020-08-28T21:52:57.30
IV.FIAM.HHE. ML:1.0 0.000015084435 1.6928 AML other m 2020-08-28T21:52:58.02
IV.CAFI.HHN. ML:1.2 0.00002105 0.6 AML other m 2020-08-28T21:52:58.66
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