Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 13-08-2020 and time 02:40:10 (Italy) in region 4 km SE Massa Martana (PG)

A magnitude ML 1.6 earthquake occured in region: 4 km SE Massa Martana (PG), on

  • 13-08-2020 00:40:10 (UTC)
  • 13-08-2020 02:40:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7530, 12.5590 at 8 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Massa Martana PG 4 3770 3770
Acquasparta TR 7 4778 8548
Giano dell'Umbria PG 9 3846 12394
Castel Ritaldi PG 12 3278 15672
Todi PG 13 16851 32523
Montecastrilli TR 13 5022 37545
Spoleto PG 15 38218 75763
Avigliano Umbro TR 15 2558 78321
San Gemini TR 16 5018 83339
Gualdo Cattaneo PG 17 6155 89494
Montefalco PG 18 5679 95173
Collazzone PG 19 3473 98646
Campello sul Clitunno PG 19 2442 101088
Monte Castello di Vibio PG 20 1567 102655
Fratta Todina PG 20 1839 104494

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of Terni (111501 inhabitants)
26 Km SW of Foligno (57155 inhabitants)
42 Km SE of Perugia (166134 inhabitants)
53 Km NE of Viterbo (67173 inhabitants)
82 Km NW of L'Aquila (69753 inhabitants)
85 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
94 Km W of Teramo (54892 inhabitants)
96 Km N of Roma (2864731 inhabitants)
97 Km SE of Arezzo (99543 inhabitants)
97 Km NE of Civitavecchia (52991 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 2020-08-13
00:40:10		 42.7533 12.5593 8 2020-11-19
12:37:05		 Bollettino Sismico Italiano INGV 84058701
Reviewed
Rev100 		ML 1.6 2020-08-13
00:40:10		 42.7495 12.554 7 2020-08-13
00:47:23		 Sala Sismica INGV-Roma 81925801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-13 00:40:10 ± 0.06
Latitude 42.7533 ± 0.0036
Longitude 12.5593 ± 0.0049
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84058701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 427
Semi-minor axis of confidence ellipse (meter) 165
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 39
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 50
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.05126
Epicentral distance of station farthest from the epicenter (degree) 0.92450
Number of stations at which the event was observed 35
Number of stations from which data was used for origin computation 35
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 59
Type of magnitude ML
Reference to an origin 84058701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-30 10:43:10

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 66
Type of magnitude ML
Reference to an origin 81925801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-13 00:47:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHZ. 2020-08-13T00:40:31.65 0.6 undecidable manual S 102 64.6908 50 0.71 38
IV.MMO1.EHZ. 2020-08-13T00:40:31.27 0.6 undecidable manual S 75 64.491 50 0.39 43
IV.CSP1.EHZ. 2020-08-13T00:40:31.30 0.6 undecidable manual S 54 64.491 50 0.42 43
IV.RM33.EHZ. 2020-08-13T00:40:29.48 0.6 undecidable manual S 117 59.8956 50 -0.19 45
IV.PARC.HHZ. 2020-08-13T00:40:28.65 0.3 undecidable manual P 345 102.6195 50 0.48 58
IV.MML1.HNE. 2020-08-13T00:40:27.82 0.6 undecidable manual S 40 52.1034 50 0.24 45
IV.MNTT.EHZ. 2020-08-13T00:40:27.28 0.3 undecidable manual P 68 90.8424 50 0.92 50
IV.FDMO.HHZ. 2020-08-13T00:40:27.82 0.6 undecidable manual S 54 53.2023 50 -0.04 47
IV.NRCA.HHZ. 2020-08-13T00:40:26.01 0.6 undecidable manual S 79 46.0206 50 0.06 47
IV.PIEI.HHZ. 2020-08-13T00:40:26.26 0.3 undecidable manual P 359 86.8464 50 0.53 59
IV.MGAB.HHZ. 2020-08-13T00:40:24.80 0.3 undecidable manual S 296 40.4262 50 0.34 68
IV.LNSS.HHZ. 2020-08-13T00:40:24.90 0.6 undecidable manual S 113 42.624 50 -0.14 47
IV.MF5.EHZ. 2020-08-13T00:40:24.91 0.3 undecidable manual P 70 77.6667 50 0.59 59
IV.CESI.HHZ. 2020-08-13T00:40:24.00 0.6 undecidable manual S 45 39.5271 50 -0.23 46
IV.EL6.EHZ. 2020-08-13T00:40:24.23 0.3 undecidable manual P 34 77.5668 50 -0.07 67
IV.CAFI.HHZ. 2020-08-13T00:40:24.57 0.3 undecidable manual P 323 79.9644 50 -0.1 66
IV.ATVO.HHZ. 2020-08-13T00:40:23.31 0.6 undecidable manual P 350 70.8735 50 0.04 45
IV.ATMI.HHZ. 2020-08-13T00:40:23.01 0.3 undecidable manual P 340 68.5758 50 0.09 68
IV.CSP1.EHZ. 2020-08-13T00:40:22.24 0.1 undecidable manual P 54 64.491 50 -0.05 92
IV.LATE.HHN. 2020-08-13T00:40:22.66 0.6 undecidable manual P 256 63.492 50 0.52 42
IV.SMA1.EHZ. 2020-08-13T00:40:22.32 0.1 undecidable manual P 102 64.6908 50 0 93
IV.BARO.HNZ. 2020-08-13T00:40:22.82 0.6 undecidable manual P 217 69.7746 50 -0.28 43
IV.FIAM.HHZ. 2020-08-13T00:40:22.64 0.6 undecidable manual P 140 70.5738 50 -0.58 40
IV.ASSB.HHZ. 2020-08-13T00:40:22.00 0.3 undecidable manual S 14 33.0447 104 -0.37 68
IV.MMO1.EHZ. 2020-08-13T00:40:22.17 0.1 undecidable manual P 75 64.491 50 -0.12 91
IV.FOSV.EHZ. 2020-08-13T00:40:21.72 0.6 undecidable manual P 15 62.2932 50 -0.22 45
IV.RM33.EHZ. 2020-08-13T00:40:21.14 0.3 undecidable manual P 117 59.8956 50 -0.45 64
IV.SACS.HHE. 2020-08-13T00:40:20.72 0.6 undecidable manual P 282 53.9016 50 0.06 47
IV.MURB.HHZ. 2020-08-13T00:40:20.96 0.3 undecidable manual P 357 56.5989 50 -0.11 69
IV.GAVE.EHZ. 2020-08-13T00:40:20.80 0.3 undecidable manual S 104 28.1496 106 0.1 73
IV.MML1.HNE. 2020-08-13T00:40:20.17 0.3 undecidable manual P 40 52.1034 50 -0.21 68
IV.ARRO.EHZ. 2020-08-13T00:40:20.40 0.3 undecidable manual S 139 25.6521 108 0.53 67
IV.FDMO.HHZ. 2020-08-13T00:40:20.37 0.1 undecidable manual P 54 53.2023 50 -0.17 92
IV.SRES.HHN. 2020-08-13T00:40:20.92 0.6 undecidable manual P 184 57.3981 50 -0.28 44
IV.ATCC.EHZ. 2020-08-13T00:40:19.53 0.3 undecidable manual P 8 48.3183 50 -0.27 68
IV.FEMA.HNE. 2020-08-13T00:40:19.38 0.3 undecidable manual P 60 46.1205 50 -0.07 71
IT.MTCL.HGZ. 2020-08-13T00:40:19.08 0.3 undecidable manual P 53 44.622 50 -0.15 70
IV.NRCA.HHZ. 2020-08-13T00:40:19.26 0.3 undecidable manual P 79 46.0206 50 -0.18 69
IV.LNSS.HHZ. 2020-08-13T00:40:18.50 0.3 undecidable manual P 113 42.624 50 -0.42 66
IV.MGAB.HHZ. 2020-08-13T00:40:18.31 0.3 undecidable manual P 296 40.4262 50 -0.27 69
IV.CESI.HHZ. 2020-08-13T00:40:18.26 0.6 undecidable manual P 45 39.5271 50 -0.19 47
IV.ASSB.HHZ. 2020-08-13T00:40:17.09 0.1 undecidable manual P 14 33.0447 104 -0.28 93
IT.FOPC.HGN. 2020-08-13T00:40:16.23 0.6 undecidable manual P 26 26.6511 107 0.09 49
IV.GAVE.EHZ. 2020-08-13T00:40:16.19 0.3 undecidable manual P 104 28.1496 106 -0.22 71
IV.ARRO.EHZ. 2020-08-13T00:40:15.93 0.3 undecidable manual P 139 25.6521 108 0 75
IV.CESX.HHZ. 2020-08-13T00:40:14.12 0.1 positive manual P 172 16.2726 117 -0.06 100
IV.MOMA.HNZ. 2020-08-13T00:40:13.94 0.6 undecidable manual S 9 5.6943 145 -0.04 51
IT.GNU.HGZ. 2020-08-13T00:40:13.99 0.6 undecidable manual S 9 5.6943 145 0.01 51
IT.GNU.HGZ. 2020-08-13T00:40:12.72 0.1 undecidable manual P 9 5.6943 145 0.19 99
IV.MOMA.HNZ. 2020-08-13T00:40:12.72 0.1 undecidable manual P 9 5.6943 145 0.19 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.7 0.0004654510000000001 0.3 AML other m 2020-08-13T00:40:16.80
IV.CESX.HHE. ML:1.7 0.0005050500500000001 0.32 AML other m 2020-08-13T00:40:18.42
IV.ARRO.EHE. ML:1.4 0.00015089335000000002 0.18 AML other m 2020-08-13T00:40:21.79
IV.ARRO.EHN. ML:1.5 0.0001965097 1.82 AML other m 2020-08-13T00:40:21.98
IV.GAVE.HNN. ML:1.5 0.00016511635500000003 0.65 AML other m 2020-08-13T00:40:22.17
IV.ASSB.HHN. ML:1.5 0.000143858 0.14 AML other m 2020-08-13T00:40:23.52
IV.ASSB.HHE. ML:1.5 0.00014214435 0.1 AML other m 2020-08-13T00:40:23.58
IV.GAVE.EHN. ML:1.5 0.0001670446 0.24 AML other m 2020-08-13T00:40:24.35
IV.CESI.HHN. ML:1.8 0.00021646475 0.22 AML other m 2020-08-13T00:40:24.33
IV.CESI.HNN. ML:1.8 0.00023084139999999997 0.2 AML other m 2020-08-13T00:40:24.34
IV.GAVE.EHE. ML:1.6 0.00019328774999999998 0.16 AML other m 2020-08-13T00:40:24.63
IV.GAVE.HNE. ML:1.6 0.00019766122 0.15 AML other m 2020-08-13T00:40:24.62
IV.MGAB.HHN. ML:1.9 0.00029682695 1.84 AML other m 2020-08-13T00:40:25.04
IV.MGAB.HNN. ML:1.9 0.00026192779999999996 1.84 AML other m 2020-08-13T00:40:25.97
IV.CESI.HNE. ML:1.6 0.00012276038 0.24 AML other m 2020-08-13T00:40:25.28
IV.CESI.HHE. ML:1.5 0.00011031815000000001 0.22 AML other m 2020-08-13T00:40:25.27
IV.MGAB.HNE. ML:1.6 0.00015366474999999998 1.74 AML other m 2020-08-13T00:40:25.01
IV.LNSS.HHN. ML:1.6 0.000137883825 0.16 AML other m 2020-08-13T00:40:25.94
IV.LNSS.HNE. ML:1.6 0.00012851614999999998 0.13 AML other m 2020-08-13T00:40:26.07
IV.MGAB.HHE. ML:1.8 0.0002095108 0.22 AML other m 2020-08-13T00:40:26.34
IV.LNSS.HHE. ML:1.6 0.000140469 0.12 AML other m 2020-08-13T00:40:26.86
IV.NRCA.HHE. ML:1.5 0.00010247982 0.12 AML other m 2020-08-13T00:40:26.82
IV.NRCA.HHN. ML:1.6 0.00012366234999999998 0.14 AML other m 2020-08-13T00:40:27.48
IV.FDMO.HHE. ML:1.5 0.00006964360499999999 0.2 AML other m 2020-08-13T00:40:28.63
IV.FDMO.HHN. ML:1.5 0.00006855778 0.14 AML other m 2020-08-13T00:40:29.17
IV.LNSS.HNN. ML:1.6 0.00013402675 0.35 AML other m 2020-08-13T00:40:29.69
IV.ATCC.EHE. ML:1.5 0.00008435267500000001 0.28 AML other m 2020-08-13T00:40:30.01
IV.MURB.HHE. ML:2.0 0.00021226575 0.26 AML other m 2020-08-13T00:40:30.84
IV.ATCC.EHN. ML:1.5 0.00009104928499999999 1.72 AML other m 2020-08-13T00:40:31.91
IV.RM33.EHN. ML:1.2 0.000036001695 0.22 AML other m 2020-08-13T00:40:31.08
IV.MURB.HNN. ML:2.0 0.0002263346 0.37 AML other m 2020-08-13T00:40:31.66
IV.MURB.HHN. ML:2.1 0.0002694736 0.36 AML other m 2020-08-13T00:40:31.66
IV.CSP1.EHN. ML:1.4 0.000047122524999999997 0.26 AML other m 2020-08-13T00:40:31.70
IV.CSP1.EHE. ML:1.6 0.000076613875 0.24 AML other m 2020-08-13T00:40:31.97
IV.RM33.EHE. ML:1.5 0.00006820273 1.84 AML other m 2020-08-13T00:40:32.02
IV.SMA1.EHN. ML:1.7 0.00008983286 0.16 AML other m 2020-08-13T00:40:32.77
IV.FOSV.EHE. ML:1.3 0.00003980184 1.74 AML other m 2020-08-13T00:40:32.89
IV.SMA1.EHE. ML:1.7 0.00008443013 1.76 AML other m 2020-08-13T00:40:32.96
IV.FOSV.EHN. ML:1.1 0.00002653714 0.18 AML other m 2020-08-13T00:40:33.05
IV.MURB.HNE. ML:2.0 0.00020004040000000002 0.3 AML other m 2020-08-13T00:40:34.81
IV.FIAM.HHE. ML:1.0 0.000017381569999999998 0.24 AML other m 2020-08-13T00:40:35.33
IV.EL6.EHE. ML:1.8 0.00008539825000000002 0.22 AML other m 2020-08-13T00:40:36.37
IV.MF5.EHN. ML:1.3 0.000028582979999999996 0.38 AML other m 2020-08-13T00:40:36.38
IV.EL6.EHN. ML:1.5 0.000046158295 0.22 AML other m 2020-08-13T00:40:36.48
IV.ATVO.HHN. ML:1.5 0.00004796507 1.6 AML other m 2020-08-13T00:40:36.00
IV.FIAM.HHN. ML:1.1 0.000019727935 1.64 AML other m 2020-08-13T00:40:37.95
IV.ATMI.HHN. ML:2.1 0.00019904925 0.32 AML other m 2020-08-13T00:40:37.49
IV.ATMI.HHE. ML:2.0 0.0001915039 1.74 AML other m 2020-08-13T00:40:37.98
IV.CAFI.HHE. ML:1.3 0.000023563489999999998 1.6 AML other m 2020-08-13T00:40:39.81
IV.CAFI.HNN. ML:2.0 0.00013342827499999998 0.74 AML other m 2020-08-13T00:40:39.55
IV.ATVO.HHE. ML:1.4 0.00004143587 0.34 AML other m 2020-08-13T00:40:39.56
IV.CAFI.HHN. ML:1.2 0.000020637575 0.46 AML other m 2020-08-13T00:40:39.90
IV.PIEI.HHN. ML:1.2 0.00002102963 0.22 AML other m 2020-08-13T00:40:40.48
IV.PIEI.HHE. ML:1.3 0.0000264 1.76 AML other m 2020-08-13T00:40:41.88
IV.MNTT.EHN. ML:1.7 0.000059792105 0.22 AML other m 2020-08-13T00:40:44.88
IV.PARC.HHE. ML:1.3 0.000020837225 0.34 AML other m 2020-08-13T00:40:46.11
IV.MNTT.EHE. ML:1.8 0.00006459368550000001 0.32 AML other m 2020-08-13T00:40:46.15
IV.MF5.EHE. ML:1.1 0.0000201571215 0.64 AML other m 2020-08-13T00:40:47.54
IV.PARC.HHN. ML:1.4 0.000025457519999999996 0.44 AML other m 2020-08-13T00:40:47.63
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