Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 04-04-2021 and time 22:49:31 (Italy) in region 8 km NE Lisciano Niccone (PG)

A magnitude ML 1.9 earthquake occured in region: 8 km NE Lisciano Niccone (PG), on

  • 04-04-2021 20:49:31 (UTC)
  • 04-04-2021 22:49:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3050, 12.2090 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
Lisciano Niccone PG 8 613 613
Umbertide PG 10 16681 17294
Montone PG 12 1680 18974
Passignano sul Trasimeno PG 15 5746 24720
Monte Santa Maria Tiberina PG 15 1183 25903
Tuoro sul Trasimeno PG 15 3780 29683
Città di Castello PG 17 39913 69596
Magione PG 18 14865 84461
Cortona AR 18 22450 106911

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of Perugia (166134 inhabitants)
32 Km SE of Arezzo (99543 inhabitants)
56 Km NW of Foligno (57155 inhabitants)
71 Km E of Siena (53903 inhabitants)
88 Km SW of Pesaro (94582 inhabitants)
89 Km SW of Fano (60888 inhabitants)
89 Km SW of Rimini (147750 inhabitants)
90 Km NW of Terni (111501 inhabitants)
93 Km SE of Firenze (382808 inhabitants)
93 Km S of Cesena (96758 inhabitants)
97 Km SE of Scandicci (50609 inhabitants)
99 Km N of Viterbo (67173 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 2021-04-04
20:49:31		 43.3053 12.2088 9 2021-07-12
16:55:13		 Bollettino Sismico Italiano INGV 90643701
Reviewed
Rev100 		ML 1.9 2021-04-04
20:49:31		 43.3025 12.2018 8 2021-04-04
21:00:07		 Sala Sismica INGV-Roma 88774781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-04 20:49:31 ± 0.03
Latitude 43.3053 ± 0.0018
Longitude 12.2088 ± 0.0025
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 90643701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 201
Semi-minor axis of confidence ellipse (meter) 189
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 32
Circular confidence region, given by single value of horizontal uncertainty (meter) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 48
Number of associated phases, regardless of their use for origin computation 61
Number of defining phases 61
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.05216
Epicentral distance of station farthest from the epicenter (degree) 0.73475
Number of stations at which the event was observed 37
Number of stations from which data was used for origin computation 37
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 90643701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-31 01:01:55

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 88774781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-04 21:00:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2021-04-04T20:49:47.14 0.6 undecidable manual S 190 44.2224 50 0.4 43
IV.FRON.EHZ. 2021-04-04T20:49:47.76 0.6 undecidable manual S 60 47.8188 50 0.05 46
IV.SSFR.HHZ. 2021-04-04T20:49:47.82 0.6 undecidable manual S 72 48.5181 50 -0.05 46
IV.FOSV.EHZ. 2021-04-04T20:49:47.11 0.6 undecidable manual S 91 44.622 50 0.28 44
IV.NARO.HHZ. 2021-04-04T20:49:46.88 0.6 undecidable manual S 41 45.2214 50 -0.12 46
IV.RUFI.EHZ. 2021-04-04T20:49:46.61 0.6 undecidable manual P 317 81.5517 50 0.36 41
IV.ARCI.HHZ. 2021-04-04T20:49:45.35 0.6 undecidable manual P 230 77.8665 50 -0.32 41
IV.EL6.EHZ. 2021-04-04T20:49:44.89 0.3 undecidable manual P 88 72.0723 50 0.1 65
IV.PARC.HHZ. 2021-04-04T20:49:44.74 0.6 undecidable manual S 4 38.1285 50 -0.37 44
IV.PIEI.HHZ. 2021-04-04T20:49:44.72 0.6 undecidable manual S 46 36.6411 50 0.01 47
IV.ASQU.HHZ. 2021-04-04T20:49:43.95 0.3 undecidable manual P 328 64.0914 50 0.4 62
IV.SSP9.EHZ. 2021-04-04T20:49:43.00 0.6 undecidable manual S 348 30.4473 106 0.03 48
IV.ARVD.HHZ. 2021-04-04T20:49:43.44 0.3 undecidable manual P 70 62.7927 50 0.08 67
IV.APEC.HHZ. 2021-04-04T20:49:43.46 0.6 undecidable manual S 31 32.8449 50 -0.23 46
IV.CESI.HHZ. 2021-04-04T20:49:43.78 0.6 undecidable manual P 120 65.3901 50 0.02 45
IV.MOMA.HHZ. 2021-04-04T20:49:43.50 0.3 undecidable manual P 152 62.8926 50 0.14 66
IV.ATPC.HHE. 2021-04-04T20:49:42.25 0.6 undecidable manual S 46 27.9498 108 0.13 47
IV.ATFO.HHZ. 2021-04-04T20:49:42.70 0.6 undecidable manual S 77 30.0477 106 -0.13 47
IV.MPAG.EHZ. 2021-04-04T20:49:42.46 0.3 undecidable manual P 51 57.0984 50 -0.01 69
IV.SACS.HHZ. 2021-04-04T20:49:42.25 0.1 undecidable manual P 206 56.0994 50 -0.08 90
IV.SSFR.HHZ. 2021-04-04T20:49:41.06 0.3 undecidable manual P 72 48.5181 50 -0.08 69
IV.MURB.HHZ. 2021-04-04T20:49:41.53 0.6 undecidable manual S 100 25.9518 109 0.06 48
IV.PE3.EHZ. 2021-04-04T20:49:41.52 0.3 undecidable manual P 28 49.1175 50 0.27 66
IV.BADI.EHZ. 2021-04-04T20:49:40.26 0.6 undecidable manual S 7 22.8549 111 -0.21 47
IV.MGAB.HHZ. 2021-04-04T20:49:40.41 0.1 positive manual P 190 44.2224 50 -0.09 92
IV.FRON.EHZ. 2021-04-04T20:49:40.88 0.1 undecidable manual P 60 47.8188 50 -0.17 90
IV.ATPI.EHZ. 2021-04-04T20:49:40.43 0.6 undecidable manual S 44 22.4553 111 0.1 48
IV.NARO.HHZ. 2021-04-04T20:49:40.42 0.1 positive manual P 41 45.2214 50 -0.22 89
IV.ASSB.HHZ. 2021-04-04T20:49:40.78 0.3 undecidable manual P 129 46.62 50 -0.08 69
IV.FOSV.EHZ. 2021-04-04T20:49:40.48 0.3 undecidable manual P 91 44.622 50 -0.08 69
IV.CAFI.HNN. 2021-04-04T20:49:39.40 0.6 undecidable manual S 278 19.7691 114 -0.08 48
IV.PARC.HHZ. 2021-04-04T20:49:39.35 0.1 undecidable manual P 4 38.1285 50 -0.21 91
IV.CRE.HHZ. 2021-04-04T20:49:39.98 0.3 undecidable manual P 329 40.5261 50 0.06 70
IV.PIEI.HHZ. 2021-04-04T20:49:39.23 0.1 undecidable manual P 46 36.6411 50 -0.1 93
IV.ATCC.EHZ. 2021-04-04T20:49:39.30 0.3 undecidable manual P 111 37.3293 50 -0.13 69
IV.TB03.DHZ. 2021-04-04T20:49:39.36 0.6 undecidable manual S 57 19.4694 114 -0.01 49
IV.TB01.DHZ. 2021-04-04T20:49:39.64 0.6 undecidable manual S 65 20.1687 114 0.04 49
IV.APEC.HHZ. 2021-04-04T20:49:38.66 0.1 positive manual P 31 32.8449 50 -0.08 94
IV.ATMC.EHE. 2021-04-04T20:49:38.20 0.6 undecidable manual S 355 15.7731 119 -0.03 49
IV.CDCA.HNZ. 2021-04-04T20:49:38.72 0.6 undecidable manual S 7 17.0718 117 0.07 48
IV.TB02.DHZ. 2021-04-04T20:49:38.92 0.6 undecidable manual S 66 17.6712 116 0.09 48
IV.ATFO.HHZ. 2021-04-04T20:49:38.19 0.3 undecidable manual P 77 30.0477 106 -0.05 71
IV.SSP9.EHZ. 2021-04-04T20:49:38.28 0.1 undecidable manual P 348 30.4473 106 -0.04 95
IV.ATLO.EHE. 2021-04-04T20:49:38.17 0.6 undecidable manual S 86 16.0728 119 -0.15 48
IV.MURB.HHZ. 2021-04-04T20:49:37.54 0.1 undecidable manual P 100 25.9518 109 0.09 95
IV.ATPC.HHE. 2021-04-04T20:49:37.85 0.1 undecidable manual P 46 27.9498 108 0.02 96
IV.ATPI.EHZ. 2021-04-04T20:49:36.87 0.1 positive manual P 44 22.4553 111 0.07 96
IV.TB01.DHZ. 2021-04-04T20:49:36.53 0.1 undecidable manual P 65 20.1687 114 0.16 95
IV.CAFI.HNN. 2021-04-04T20:49:36.36 0.1 undecidable manual P 278 19.7691 114 0.06 97
IV.TB02.DHZ. 2021-04-04T20:49:36.21 0.1 undecidable manual P 66 17.6712 116 0.28 93
IV.BADI.EHZ. 2021-04-04T20:49:36.85 0.1 positive manual P 7 22.8549 111 -0.03 97
IT.UMBT.HGZ. 2021-04-04T20:49:36.95 0.6 undecidable manual S 91 10.878 129 0.12 48
IV.TB03.DHZ. 2021-04-04T20:49:36.44 0.1 undecidable manual P 57 19.4694 114 0.19 94
IV.ATLO.EHE. 2021-04-04T20:49:35.88 0.1 undecidable manual P 86 16.0728 119 0.25 94
IV.ATVA.EHE. 2021-04-04T20:49:35.16 0.3 undecidable manual S 116 6.8931 142 -0.68 63
IV.ATMC.EHE. 2021-04-04T20:49:35.66 0.1 undecidable manual P 355 15.7731 119 0.07 97
IV.ATMI.HHZ. 2021-04-04T20:49:35.32 0.6 undecidable manual S 56 5.7942 147 -0.3 47
IV.CDCA.HNZ. 2021-04-04T20:49:35.89 0.3 undecidable manual P 7 17.0718 117 0.07 73
IV.ATMI.HHZ. 2021-04-04T20:49:34.09 0.1 undecidable manual P 56 5.7942 147 0.02 100
IT.UMBT.HGZ. 2021-04-04T20:49:34.94 0.1 undecidable manual P 91 10.878 129 0.16 96
IV.ATVA.EHE. 2021-04-04T20:49:34.07 0.1 undecidable manual P 116 6.8931 142 -0.13 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATMI.HHN. ML:2.3 0.00396 0.16 AML other m 2021-04-04T20:49:35.51
IV.ATMI.HHE. ML:2.4 0.004719999999999999 0.76 AML other m 2021-04-04T20:49:36.49
IV.ATPI.HNN. ML:2.2 0.001155 0.42 AML other m 2021-04-04T20:49:40.70
IV.ATPI.EHN. ML:2.2 0.001165 0.4 AML other m 2021-04-04T20:49:40.71
IV.BADI.EHN. ML:1.7 0.00034599999999999995 0.8 AML other m 2021-04-04T20:49:41.08
IV.ATPI.HNE. ML:2.0 0.0006405000000000001 0.76 AML other m 2021-04-04T20:49:41.39
IV.ATPI.EHE. ML:2.0 0.000625 0.76 AML other m 2021-04-04T20:49:41.78
IV.BADI.EHE. ML:1.7 0.000325 1.4 AML other m 2021-04-04T20:49:42.86
IV.ATFO.HHE. ML:2.2 0.0007965 1.22 AML other m 2021-04-04T20:49:43.10
IV.ATFO.HHN. ML:2.1 0.0006805 0.2 AML other m 2021-04-04T20:49:43.10
IV.MURB.HHN. ML:2.7 0.0028899999999999998 0.28 AML other m 2021-04-04T20:49:43.75
IV.MURB.HNN. ML:2.7 0.0029950000000000003 0.26 AML other m 2021-04-04T20:49:43.76
IV.MURB.HNE. ML:2.6 0.0020499999999999997 1.58 AML other m 2021-04-04T20:49:43.16
IV.MURB.HHE. ML:2.5 0.002045 1.66 AML other m 2021-04-04T20:49:43.96
IV.SSP9.EHN. ML:1.5 0.00015245 0.42 AML other m 2021-04-04T20:49:44.22
IV.APEC.HHE. ML:2.0 0.0003985 0.66 AML other m 2021-04-04T20:49:44.93
IV.PARC.HHE. ML:1.7 0.000187 1.16 AML other m 2021-04-04T20:49:45.15
IV.PIEI.HHE. ML:1.9 0.0003395 0.74 AML other m 2021-04-04T20:49:45.59
IV.APEC.HHN. ML:2.1 0.0006374999999999999 0.96 AML other m 2021-04-04T20:49:45.25
IV.PIEI.HHN. ML:1.7 0.0001815 0.74 AML other m 2021-04-04T20:49:45.41
IV.CRE.HHN. ML:1.5 0.00011929999999999999 0.42 AML other m 2021-04-04T20:49:46.21
IV.PARC.HHN. ML:1.8 0.00025550000000000003 0.68 AML other m 2021-04-04T20:49:46.57
IV.ATCC.EHE. ML:1.9 0.0002765 1.56 AML other m 2021-04-04T20:49:46.03
IV.CRE.HHE. ML:1.5 0.000114 1.02 AML other m 2021-04-04T20:49:47.61
IV.MGAB.HHN. ML:2.8 0.001845 0.24 AML other m 2021-04-04T20:49:47.49
IV.MGAB.HNN. ML:2.8 0.00175 0.24 AML other m 2021-04-04T20:49:47.50
IV.ATCC.EHN. ML:2.0 0.00034250000000000003 0.62 AML other m 2021-04-04T20:49:47.97
IV.NARO.HHN. ML:1.5 0.00008995 0.3 AML other m 2021-04-04T20:49:47.99
IV.NARO.HHE. ML:1.6 0.000112 0.3 AML other m 2021-04-04T20:49:48.01
IV.MGAB.HNE. ML:2.5 0.0009655 0.72 AML other m 2021-04-04T20:49:48.03
IV.MGAB.HHE. ML:2.6 0.001185 0.72 AML other m 2021-04-04T20:49:48.03
IV.FOSV.EHN. ML:1.5 0.00010109999999999999 1.54 AML other m 2021-04-04T20:49:48.89
IV.FRON.EHE. ML:1.6 0.00009825 0.84 AML other m 2021-04-04T20:49:48.46
IV.FRON.EHN. ML:1.9 0.0001985 0.28 AML other m 2021-04-04T20:49:48.88
IV.SSFR.HHN. ML:2.0 0.0003 0.58 AML other m 2021-04-04T20:49:49.31
IV.SSFR.HNN. ML:2.2 0.00041150000000000003 0.6 AML other m 2021-04-04T20:49:49.32
IV.FOSV.EHE. ML:1.6 0.0001245 0.64 AML other m 2021-04-04T20:49:49.84
IV.SSFR.HHE. ML:2.2 0.0004235 0.18 AML other m 2021-04-04T20:49:50.63
IV.SSFR.HNE. ML:2.2 0.0004380000000000001 0.2 AML other m 2021-04-04T20:49:50.64
IV.SSP9.EHE. ML:1.5 0.0001661 0.68 AML other m 2021-04-04T20:49:51.13
IV.SACS.HHN. ML:1.9 0.000183 1.46 AML other m 2021-04-04T20:49:51.94
IV.SACS.HHE. ML:1.8 0.0001395 1.02 AML other m 2021-04-04T20:49:51.60
IV.MPAG.EHE. ML:1.6 0.00007925 0.44 AML other m 2021-04-04T20:49:52.63
IV.MPAG.EHN. ML:1.6 0.00008054999999999999 0.32 AML other m 2021-04-04T20:49:53.00
IV.ARVD.HHN. ML:1.6 0.00006875 0.7 AML other m 2021-04-04T20:49:53.97
IV.ARVD.HHE. ML:1.4 0.00005275000000000001 1.34 AML other m 2021-04-04T20:49:53.71
IV.CESI.HHE. ML:1.5 0.000056149999999999996 0.58 AML other m 2021-04-04T20:49:55.06
IV.ASQU.HHE. ML:1.4 0.000046649999999999996 0.84 AML other m 2021-04-04T20:49:55.44
IV.MOMA.HHE. ML:1.9 0.00014649999999999998 0.4 AML other m 2021-04-04T20:49:56.18
IV.MOMA.HHN. ML:1.8 0.0001305 0.66 AML other m 2021-04-04T20:49:56.59
IV.ASQU.HHN. ML:1.5 0.0000583 0.96 AML other m 2021-04-04T20:50:01.46
IV.CESI.HHN. ML:1.5 0.00005335 0.5 AML other m 2021-04-04T20:50:01.71
IV.GAVE.EHE. ML:2.1 0.00013935 0.46 AML other m 2021-04-04T20:50:03.86
IV.GAVE.EHN. ML:2.1 0.000154 0.46 AML other m 2021-04-04T20:50:12.29
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