Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 19-07-2020 and time 19:41:22 (Italy) in region 2 km NW Massa Martana (PG)

A magnitude ML 1.7 earthquake occured in region: 2 km NW Massa Martana (PG), on

  • 19-07-2020 17:41:22 (UTC)
  • 19-07-2020 19:41:22 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7910, 12.5170 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.

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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
Massa Martana PG 2 3770 3770
Giano dell'Umbria PG 7 3846 7616
Todi PG 9 16851 24467
Acquasparta TR 11 4778 29245
Collazzone PG 13 3473 32718
Castel Ritaldi PG 13 3278 35996
Gualdo Cattaneo PG 14 6155 42151
Fratta Todina PG 14 1839 43990
Monte Castello di Vibio PG 15 1567 45557
Montecastrilli TR 16 5022 50579
Montefalco PG 16 5679 56258
Avigliano Umbro TR 17 2558 58816
Bevagna PG 18 5081 63897
Spoleto PG 19 38218 102115
Marsciano PG 20 18902 121017
San Gemini TR 20 5018 126035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Foligno (57155 inhabitants)
28 Km NW of Terni (111501 inhabitants)
37 Km S of Perugia (166134 inhabitants)
53 Km NE of Viterbo (67173 inhabitants)
87 Km NW of L'Aquila (69753 inhabitants)
90 Km N of Guidonia Montecelio (88673 inhabitants)
91 Km SE of Arezzo (99543 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
98 Km NE of Civitavecchia (52991 inhabitants)
98 Km W of Teramo (54892 inhabitants)
100 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 1.7 2020-07-19
17:41:22		 42.7912 12.5168 8 2020-11-19
12:36:54		 Bollettino Sismico Italiano INGV 81279851
Reviewed
Rev100 		ML 1.7 2020-07-19
17:41:22		 42.79 12.5128 8 2020-07-19
17:52:44		 Sala Sismica INGV-Roma 81163691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-19 17:41:22 ± 0.08
Latitude 42.7912 ± 0.0036
Longitude 12.5168 ± 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 81279851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 463
Semi-minor axis of confidence ellipse (meter) 290
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 216
Circular confidence region, given by single value of horizontal uncertainty (meter) 460.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 49
Number of associated phases, regardless of their use for origin computation 49
Number of defining phases 49
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.04137
Epicentral distance of station farthest from the epicenter (degree) 0.74374
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 81279851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-23 14:38:30

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 81163691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-19 17:52:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-07-19T17:41:48.54 0.3 undecidable manual S 74 79.6647 50 1.46 40
IV.PIEI.HHZ. 2020-07-19T17:41:48.96 0.6 undecidable manual S 1 82.5507 50 1.1 32
IV.EL6.EHZ. 2020-07-19T17:41:46.89 0.3 undecidable manual S 38 76.2681 50 0.73 57
IV.BARO.HNZ. 2020-07-19T17:41:45.46 1.0 undecidable manual S 212 71.2731 50 0.62 20
IV.SMA1.EHZ. 2020-07-19T17:41:44.81 0.3 undecidable manual S 105 69.0753 50 0.56 62
IV.RM33.EHZ. 2020-07-19T17:41:43.23 0.3 undecidable manual S 119 64.9905 50 0.08 70
IV.CSP1.EHZ. 2020-07-19T17:41:43.31 0.3 undecidable manual S 59 65.0904 50 0.13 69
IV.MMO1.EHZ. 2020-07-19T17:41:43.76 0.3 undecidable manual S 79 66.9774 50 0.08 69
IV.ATLO.EHE. 2020-07-19T17:41:41.51 0.3 undecidable manual S 351 58.7967 50 0 72
IV.ATVA.EHN. 2020-07-19T17:41:40.30 0.3 undecidable manual S 341 57.1983 50 -0.79 57
IV.MURB.HHZ. 2020-07-19T17:41:40.23 0.3 undecidable manual S 1 52.3032 50 0.44 66
IV.MC2.EHZ. 2020-07-19T17:41:40.96 0.3 undecidable manual S 76 56.2992 50 0.13 70
IV.SACS.HHE. 2020-07-19T17:41:39.60 0.3 undecidable manual S 278 49.8168 50 0.49 66
IV.ATCC.EHZ. 2020-07-19T17:41:38.02 0.3 undecidable manual S 13 44.8218 50 0.24 70
IV.NRCA.HHZ. 2020-07-19T17:41:38.63 0.3 undecidable manual S 84 48.8178 50 -0.22 70
IV.PIEI.HHZ. 2020-07-19T17:41:37.77 0.1 undecidable manual P 1 82.5507 50 0.58 80
IV.LNSS.HHZ. 2020-07-19T17:41:37.81 0.3 undecidable manual S 116 47.5191 50 -0.69 61
IV.MF5.EHZ. 2020-07-19T17:41:37.16 0.1 undecidable manual P 74 79.6647 50 0.42 84
IV.EL6.EHZ. 2020-07-19T17:41:36.21 0.1 undecidable manual P 38 76.2681 50 0 92
IV.MGAB.HHZ. 2020-07-19T17:41:35.23 0.3 undecidable manual S 292 35.5422 102 -0.02 74
IV.SMA1.EHZ. 2020-07-19T17:41:35.00 0.1 undecidable manual P 105 69.0753 50 -0.1 92
IV.CESI.HNN. 2020-07-19T17:41:35.89 0.3 undecidable manual S 53 39.4272 50 -0.45 68
IV.ARRO.EHZ. 2020-07-19T17:41:34.24 0.6 undecidable manual S 139 31.0467 104 0.51 45
IV.MMO1.EHZ. 2020-07-19T17:41:34.56 0.1 undecidable manual P 79 66.9774 50 -0.22 90
IV.BARO.HNZ. 2020-07-19T17:41:34.94 0.6 undecidable manual P 212 71.2731 50 -0.51 42
IV.RM33.EHZ. 2020-07-19T17:41:34.08 0.1 undecidable manual P 119 64.9905 50 -0.4 87
IV.LATE.HHN. 2020-07-19T17:41:34.64 1.0 undecidable manual P 252 61.3941 50 0.72 20
IV.GAVE.EHZ. 2020-07-19T17:41:34.34 0.3 undecidable manual S 110 32.6451 103 0.08 74
IV.CSP1.EHZ. 2020-07-19T17:41:34.31 0.1 undecidable manual P 59 65.0904 50 -0.18 91
IV.ATLO.EHE. 2020-07-19T17:41:33.32 0.1 undecidable manual P 351 58.7967 50 -0.2 92
IV.ATVA.EHN. 2020-07-19T17:41:33.02 0.1 undecidable manual P 341 57.1983 50 -0.26 91
IV.ASSB.HHZ. 2020-07-19T17:41:33.06 0.3 undecidable manual S 22 30.1476 104 -0.37 70
IV.MC2.EHZ. 2020-07-19T17:41:32.94 0.1 undecidable manual P 76 56.2992 50 -0.19 92
IV.SACS.HHE. 2020-07-19T17:41:32.16 0.1 undecidable manual P 278 49.8168 50 0.02 97
IV.MURB.HHZ. 2020-07-19T17:41:32.41 0.1 undecidable manual P 1 52.3032 50 -0.12 94
IV.LNSS.HHZ. 2020-07-19T17:41:31.38 0.1 undecidable manual P 116 47.5191 50 -0.41 90
IV.ATCC.EHZ. 2020-07-19T17:41:31.42 0.1 undecidable manual P 13 44.8218 50 0.05 97
IV.NRCA.HHZ. 2020-07-19T17:41:31.60 0.1 undecidable manual P 84 48.8178 50 -0.39 90
IV.CESX.HHZ. 2020-07-19T17:41:30.61 0.3 undecidable manual S 164 21.0678 110 0.21 73
IV.CESI.HNN. 2020-07-19T17:41:30.23 0.1 undecidable manual P 53 39.4272 50 -0.31 93
IV.ARRO.EHZ. 2020-07-19T17:41:29.01 0.1 undecidable manual P 139 31.0467 104 -0.02 100
IV.MGAB.HHZ. 2020-07-19T17:41:29.66 0.1 undecidable manual P 292 35.5422 102 -0.25 95
IV.GAVE.EHZ. 2020-07-19T17:41:28.94 0.1 undecidable manual P 110 32.6451 103 -0.4 92
IV.ASSB.HHZ. 2020-07-19T17:41:28.66 0.1 undecidable manual P 22 30.1476 104 -0.2 97
IV.CESX.HHZ. 2020-07-19T17:41:27.28 0.1 undecidable manual P 164 21.0678 110 0.17 99
IT.GNU.HGN. 2020-07-19T17:41:25.76 0.3 undecidable manual S 72 4.5954 150 0.03 78
IV.MOMA.HHZ. 2020-07-19T17:41:25.95 0.6 undecidable manual S 72 4.5954 150 0.22 50
IV.MOMA.HHZ. 2020-07-19T17:41:24.67 0.1 undecidable manual P 72 4.5954 150 0.26 100
IT.GNU.HGN. 2020-07-19T17:41:24.68 0.1 undecidable manual P 72 4.5954 150 0.26 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESX.HHN. ML:1.7 0.0003520019 0.192 AML other m 2020-07-19T17:41:31.45
IV.CESX.HHE. ML:1.7 0.00038838205 0.512 AML other m 2020-07-19T17:41:32.01
IV.ASSB.HHE. ML:1.3 0.00008937095 0.1152 AML other m 2020-07-19T17:41:34.21
IV.GAVE.EHE. ML:1.8 0.00026371984999999995 0.1664 AML other m 2020-07-19T17:41:34.64
IV.GAVE.HNE. ML:1.8 0.00027884700000000004 0.1536 AML other m 2020-07-19T17:41:34.72
IV.LNSS.HNN. ML:1.8 0.00017044494999999998 0.6784 AML other m 2020-07-19T17:41:34.86
IV.GAVE.EHN. ML:1.8 0.00031356434999999997 0.1664 AML other m 2020-07-19T17:41:35.42
IV.ARRO.EHE. ML:1.4 0.00013153595 0.32 AML other m 2020-07-19T17:41:35.95
IV.ARRO.EHN. ML:1.5 0.00014749389000000003 1.808 AML other m 2020-07-19T17:41:36.93
IV.ASSB.HHN. ML:1.3 0.000092311175 0.0768 AML other m 2020-07-19T17:41:36.22
IV.RM33.HNN. ML:1.8 0.00012276964999999998 1.1808 AML other m 2020-07-19T17:41:36.40
IV.MGAB.HNE. ML:1.9 0.00034434215000000003 0.4224 AML other m 2020-07-19T17:41:36.70
IV.MGAB.HHE. ML:1.9 0.00029687525 0.3968 AML other m 2020-07-19T17:41:36.70
IV.MGAB.HNN. ML:1.7 0.00020919169999999998 0.4352 AML other m 2020-07-19T17:41:37.77
IV.MGAB.HHN. ML:1.7 0.0002084057 0.4224 AML other m 2020-07-19T17:41:37.56
IV.NRCA.HHE. ML:1.9 0.00020764680000000003 0.1408 AML other m 2020-07-19T17:41:39.14
IV.NRCA.HNE. ML:1.9 0.00019911095 0.128 AML other m 2020-07-19T17:41:39.07
IV.NRCA.HHN. ML:2.0 0.0002379811 0.1152 AML other m 2020-07-19T17:41:39.13
IV.NRCA.HNN. ML:1.9 0.00020934025 0.128 AML other m 2020-07-19T17:41:39.25
IV.LNSS.HHN. ML:1.7 0.00013942011500000002 0.1536 AML other m 2020-07-19T17:41:39.32
IV.ATCC.EHE. ML:1.3 0.000063898885 0.2176 AML other m 2020-07-19T17:41:39.63
IV.LNSS.HHE. ML:1.7 0.00014461865 0.0896 AML other m 2020-07-19T17:41:40.29
IV.LNSS.HNE. ML:1.7 0.000128836735 0.1152 AML other m 2020-07-19T17:41:40.30
IV.ATCC.EHN. ML:1.4 0.00007841484 0.2944 AML other m 2020-07-19T17:41:41.23
IV.MURB.HNE. ML:2.0 0.0002537468 0.2688 AML other m 2020-07-19T17:41:41.45
IV.MURB.HNN. ML:1.8 0.00015282219 0.1792 AML other m 2020-07-19T17:41:41.57
IV.MURB.HHN. ML:2.0 0.00024665165 0.1792 AML other m 2020-07-19T17:41:41.57
IV.MURB.HHE. ML:2.0 0.0002712732 0.192 AML other m 2020-07-19T17:41:43.43
IV.CSP1.EHE. ML:1.6 0.000068330765 0.2816 AML other m 2020-07-19T17:41:43.84
IV.GAVE.HNN. ML:1.6 0.00017284684999999998 0.9248 AML other m 2020-07-19T17:41:44.15
IV.RM33.EHN. ML:1.4 0.00004358349 0.1408 AML other m 2020-07-19T17:41:45.08
IV.RM33.EHE. ML:1.5 0.0000570991 0.1792 AML other m 2020-07-19T17:41:45.13
IV.SMA1.EHE. ML:1.6 0.00007608603999999999 0.2304 AML other m 2020-07-19T17:41:45.15
IV.CSP1.EHN. ML:1.6 0.000081641925 0.1536 AML other m 2020-07-19T17:41:45.25
IV.SMA1.EHN. ML:1.6 0.000074282725 0.2816 AML other m 2020-07-19T17:41:46.18
IV.EL6.EHE. ML:1.6 0.000054371975 0.1408 AML other m 2020-07-19T17:41:47.65
IV.MF5.EHN. ML:1.6 0.00005407477000000001 0.4352 AML other m 2020-07-19T17:41:49.47
IV.EL6.EHN. ML:1.5 0.00004812393 0.2432 AML other m 2020-07-19T17:41:52.24
IV.PIEI.HHE. ML:1.4 0.0000303 0.26 AML other m 2020-07-19T17:41:52.28
IV.PIEI.HHN. ML:1.1 0.000017425705 0.256 AML other m 2020-07-19T17:41:52.58
IV.RM33.HNE. ML:2.0 0.00016480354999999999 0.8064 AML other m 2020-07-19T17:41:55.56
IV.MF5.EHE. ML:1.6 0.000053984425999999995 0.4992 AML other m 2020-07-19T17:41:55.78
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