Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 27-03-2021 and time 23:04:18 (UTC) in region 6 km NE Montone (PG)

A magnitude ML 1.1 earthquake occured in region: 6 km NE Montone (PG), on

  • 27-03-2021 23:04:18 (UTC)
  • 28-03-2021 00:04:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4100, 12.3730 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
Montone PG 6 1680 1680
Pietralunga PG 6 2111 3791
Umbertide PG 12 16681 20472
Città di Castello PG 12 39913 60385
Apecchio PU 17 1882 62267
Monte Santa Maria Tiberina PG 17 1183 63450
Gubbio PG 18 32216 95666

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Perugia (166134 inhabitants)
40 Km E of Arezzo (99543 inhabitants)
57 Km NW of Foligno (57155 inhabitants)
71 Km SW of Pesaro (94582 inhabitants)
71 Km SW of Fano (60888 inhabitants)
74 Km S of Rimini (147750 inhabitants)
82 Km S of Cesena (96758 inhabitants)
85 Km E of Siena (53903 inhabitants)
94 Km S of Forlì (117913 inhabitants)
95 Km W of Ancona (100861 inhabitants)
97 Km N of Terni (111501 inhabitants)
98 Km E of Firenze (382808 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 1.1 2021-03-27
23:04:18		 43.4097 12.3727 8 2021-07-12
16:55:08		 Bollettino Sismico Italiano INGV 89426691
Reviewed
Rev100 		ML 1.1 2021-03-27
23:04:18		 43.4152 12.3757 7 2021-03-27
23:09:46		 Sala Sismica INGV-Roma 88536631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-27 23:04:18 ± 0.06
Latitude 43.4097 ± 0.0018
Longitude 12.3727 ± 0.0025
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 89426691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 220
Semi-minor axis of confidence ellipse (meter) 63
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 103
Circular confidence region, given by single value of horizontal uncertainty (meter) 220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 35
Number of associated phases, regardless of their use for origin computation 47
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.42178
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 89426691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-24 08:16:52

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 88536631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-27 23:09:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2021-03-27T23:04:38.86 3.0 negative manual P 0.29 0
IV.ARVD.HHZ. 2021-03-27T23:04:33.57 0.3 undecidable manual S 78 46.8198 50 -0.23 67
IV.PE3.EHZ. 2021-03-27T23:04:30.27 0.6 undecidable manual S 17 33.2445 104 0.19 46
IV.ATCC.EHZ. 2021-03-27T23:04:30.23 0.3 undecidable manual S 139 32.9448 104 0.25 68
IV.SSP9.EHZ. 2021-03-27T23:04:28.03 0.3 undecidable manual S 313 26.6511 107 0.17 70
IV.PARC.HHZ. 2021-03-27T23:04:28.58 0.6 undecidable manual S 338 28.6491 106 0.06 48
IV.FRON.EHZ. 2021-03-27T23:04:28.96 0.3 undecidable manual S 67 30.8469 105 -0.31 68
IV.NARO.HHZ. 2021-03-27T23:04:27.94 0.6 undecidable manual S 37 27.8499 106 -0.34 45
IV.ARVD.HHZ. 2021-03-27T23:04:26.99 0.3 undecidable manual P 78 46.8198 50 -0.22 67
IV.APEC.HHZ. 2021-03-27T23:04:25.04 0.6 undecidable manual S 13 16.9719 116 0.32 46
IV.PIEI.HNZ. 2021-03-27T23:04:25.68 0.3 undecidable manual S 43 19.1697 113 0.26 70
IV.PE3.EHZ. 2021-03-27T23:04:25.34 0.3 positive manual P 17 33.2445 104 0.28 68
IV.MURB.HHZ. 2021-03-27T23:04:25.83 0.6 undecidable manual S 143 20.3685 112 0.02 49
IV.ATMC.EHZ. 2021-03-27T23:04:24.17 0.3 undecidable manual S 286 15.0738 118 0.03 74
IV.ATCC.EHZ. 2021-03-27T23:04:24.85 0.3 undecidable manual P 139 32.9448 104 -0.15 70
IV.ATFO.HHZ. 2021-03-27T23:04:24.65 0.3 undecidable manual S 107 16.7721 116 -0.01 74
IV.CAFI.HNN. 2021-03-27T23:04:24.92 0.1 undecidable manual P 255 33.9438 104 -0.27 90
IV.ATBU.EHZ. 2021-03-27T23:04:24.64 0.6 undecidable manual S 63 15.9729 117 0.23 47
IV.PARC.HHZ. 2021-03-27T23:04:24.05 0.3 undecidable manual P 338 28.6491 106 -0.11 71
IV.ATVA.EHZ. 2021-03-27T23:04:24.16 0.3 undecidable manual S 206 16.1727 117 -0.32 69
IV.FRON.EHZ. 2021-03-27T23:04:24.29 0.3 undecidable manual P 67 30.8469 105 -0.3 68
IV.NARO.HHZ. 2021-03-27T23:04:23.64 0.3 undecidable manual P 37 27.8499 106 -0.38 67
IV.SSP9.EHZ. 2021-03-27T23:04:23.70 0.3 undecidable manual P 313 26.6511 107 -0.07 72
IV.ATSC.EHZ. 2021-03-27T23:04:23.51 0.3 undecidable manual P 86 25.3524 108 -0.02 73
IT.UMBT.HGZ. 2021-03-27T23:04:23.41 0.6 undecidable manual S 191 11.9769 124 0.19 48
IV.ATBU.EHZ. 2021-03-27T23:04:22.08 0.1 undecidable manual P 63 15.9729 117 0.3 93
IV.MURB.HHZ. 2021-03-27T23:04:22.75 0.1 undecidable manual P 143 20.3685 112 0.16 95
IV.ATPC.HNZ. 2021-03-27T23:04:22.73 0.6 undecidable manual S 41 10.3785 128 -0.06 49
IV.APEC.HHZ. 2021-03-27T23:04:22.08 0.1 undecidable manual P 13 16.9719 116 0.12 96
IV.ATLO.EHZ. 2021-03-27T23:04:22.97 0.6 undecidable manual S 165 10.878 127 0.06 49
IV.PIEI.HNZ. 2021-03-27T23:04:22.56 0.1 undecidable manual P 43 19.1697 113 0.2 94
IV.ATMI.HHZ. 2021-03-27T23:04:22.99 0.6 undecidable manual S 225 11.877 124 -0.21 48
IV.ATLO.EHZ. 2021-03-27T23:04:21.14 0.3 undecidable manual P 165 10.878 127 0.23 71
IT.UMBT.HGZ. 2021-03-27T23:04:21.34 1.0 undecidable manual P 191 11.9769 124 0.25 24
IV.TB01.DHZ.01 2021-03-27T23:04:21.60 0.6 undecidable manual S 121 5.994 144 -0.1 49
IV.ATMI.HHZ. 2021-03-27T23:04:21.16 0.3 undecidable manual P 225 11.877 124 0.07 73
IV.ATVA.EHZ. 2021-03-27T23:04:21.97 0.3 undecidable manual P 206 16.1727 117 0.15 72
IV.ATMC.EHZ. 2021-03-27T23:04:21.64 0.1 undecidable manual P 286 15.0738 118 0.01 99
IV.ATPI.EHZ. 2021-03-27T23:04:21.05 0.3 undecidable manual S 28 5.0949 148 -0.5 68
IV.ATPC.HNZ. 2021-03-27T23:04:21.01 0.1 undecidable manual P 41 10.3785 128 0.16 96
IV.ATFO.HHZ. 2021-03-27T23:04:21.93 0.3 undecidable manual P 107 16.7721 116 0 74
IV.TB02.DHZ.01 2021-03-27T23:04:21.62 0.3 undecidable manual S 146 5.2947 147 0.05 75
IV.TB02.DHZ.01 2021-03-27T23:04:20.30 0.1 undecidable manual P 146 5.2947 147 0.16 97
IV.TB03.DHZ.01 2021-03-27T23:04:20.85 0.3 undecidable manual S 107 3.1968 159 -0.38 70
IV.TB01.DHZ.01 2021-03-27T23:04:20.32 0.1 undecidable manual P 121 5.994 144 0.1 98
IV.ATPI.EHZ. 2021-03-27T23:04:19.99 0.1 undecidable manual P 28 5.0949 148 -0.14 98
IV.TB03.DHZ.01 2021-03-27T23:04:19.91 0.1 undecidable manual P 107 3.1968 159 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATFO.HHN. ML:0.9 0.0000798 0.38 AML other m 2021-03-27T23:04:25.05
IV.APEC.HHN. ML:1.3 0.000168 0.1 AML other m 2021-03-27T23:04:25.35
IV.ATFO.HHE. ML:1.1 0.00010539999999999999 0.6 AML other m 2021-03-27T23:04:25.24
IV.APEC.HHE. ML:1.2 0.000134 0.18 AML other m 2021-03-27T23:04:26.93
IV.MURB.HHN. ML:1.1 0.00009105 1.82 AML other m 2021-03-27T23:04:27.06
IV.ATMI.HHE. ML:0.8 0.00008695 1.28 AML other m 2021-03-27T23:04:27.97
IV.MURB.HHE. ML:1.1 0.00009415 1.1 AML other m 2021-03-27T23:04:29.56
IV.FRON.EHE. ML:0.9 0.00004165 0.1 AML other m 2021-03-27T23:04:29.30
IV.FRON.EHN. ML:1.2 0.0000736 0.12 AML other m 2021-03-27T23:04:29.40
IV.ATMI.HHN. ML:0.9 0.00008834999999999999 0.44 AML other m 2021-03-27T23:04:29.70
IV.SEI.HHE. ML:1.9 0.0000746 0.1 AML other m 2021-03-27T23:04:52.27
IV.SEI.HHN. ML:1.8 0.0000579 0.08 AML other m 2021-03-27T23:04:52.27
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