Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-04-2021 and time 00:26:39 (UTC) in region 10 km NW Valfabbrica (PG)

A magnitude ML 1.3 earthquake occured in region: 10 km NW Valfabbrica (PG), on

  • 18-04-2021 00:26:39 (UTC)
  • 18-04-2021 02:26:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2180, 12.5100 at 62 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
Valfabbrica PG 10 3389 3389
Perugia PG 16 166134 169523
Gubbio PG 16 32216 201739
Bastia Umbra PG 17 21874 223613
Umbertide PG 18 16681 240294
Assisi PG 18 28299 268593

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Perugia (166134 inhabitants)
33 Km NW of Foligno (57155 inhabitants)
58 Km E of Arezzo (99543 inhabitants)
74 Km N of Terni (111501 inhabitants)
81 Km SW of Fano (60888 inhabitants)
84 Km SW of Pesaro (94582 inhabitants)
93 Km W of Ancona (100861 inhabitants)
94 Km S of Rimini (147750 inhabitants)
95 Km NE of Viterbo (67173 inhabitants)
96 Km E of Siena (53903 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 1.3 2021-04-18
00:26:39		 43.2178 12.5095 62 2021-07-12
16:55:10		 Bollettino Sismico Italiano INGV 89964941
Reviewed
Rev100 		ML 1.5 2021-04-18
00:26:39		 43.1978 12.5605 63 2021-04-18
00:34:00		 Sala Sismica INGV-Roma 89195141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-18 00:26:39 ± 0.09
Latitude 43.2178 ± 0.0045
Longitude 12.5095 ± 0.0062
Depth (km) 62 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89964941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 435
Semi-minor axis of confidence ellipse (meter) 274
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 266
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) 56
Number of associated phases, regardless of their use for origin computation 59
Number of defining phases 59
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) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.61154
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 32
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 89195141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-18 00:34:00

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 89964941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-10 13:48:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-04-18T00:27:02.08 0.6 undecidable manual S 104 57.9975 129 0.19 45
IV.CRE.HHZ. 2021-04-18T00:27:02.55 0.3 undecidable manual S 315 63.2922 126 -0.24 66
IV.ARVD.HHZ. 2021-04-18T00:27:00.34 0.3 undecidable manual S 48 46.7199 136 0.25 69
IV.MGAB.HHZ. 2021-04-18T00:27:00.39 0.3 undecidable manual S 224 46.7199 136 0.29 67
IV.CAFI.HNN. 2021-04-18T00:27:00.19 0.3 undecidable manual S 286 45.621 137 0.26 68
IV.FDMO.HHZ. 2021-04-18T00:27:00.55 0.6 undecidable manual S 113 50.9157 133 -0.19 46
IV.FRON.EHZ. 2021-04-18T00:26:59.00 0.3 undecidable manual S 28 37.5291 143 0.18 70
IV.NARO.HHZ. 2021-04-18T00:26:59.93 0.3 undecidable manual S 7 43.9227 138 0.24 69
IV.MOMA.HHZ. 2021-04-18T00:26:59.79 0.3 undecidable manual S 174 46.2204 137 -0.23 70
IV.BADI.EHE. 2021-04-18T00:26:58.99 0.6 undecidable manual S 327 38.8278 142 0.01 48
IV.SSFR.HHZ. 2021-04-18T00:26:58.58 0.3 undecidable manual S 42 32.745 147 0.36 68
IV.ATMC.EHE. 2021-04-18T00:26:58.34 0.6 undecidable manual S 315 36.0417 144 -0.28 46
IV.CESI.HHZ. 2021-04-18T00:26:58.78 0.3 undecidable manual S 126 39.7269 141 -0.33 69
IV.ATBU.EHZ. 2021-04-18T00:26:58.14 0.6 undecidable manual S 6 28.749 151 0.36 46
IV.PIEI.HHZ. 2021-04-18T00:26:58.67 0.3 undecidable manual S 3 35.3424 145 0.14 71
IV.ATSC.EHZ. 2021-04-18T00:26:57.87 0.3 undecidable manual S 32 26.9508 152 0.28 70
IV.ATMI.HHZ. 2021-04-18T00:26:57.51 0.6 undecidable manual S 304 23.3544 156 0.26 47
IV.ATPC.HHE. 2021-04-18T00:26:57.97 0.6 undecidable manual S 352 29.4483 150 0.12 48
IV.FOSV.HNZ. 2021-04-18T00:26:57.25 0.3 undecidable manual S 67 22.0668 157 0.11 73
IV.ATPI.EHE. 2021-04-18T00:26:57.39 0.6 undecidable manual S 342 27.2505 152 -0.23 48
IV.ATLO.HNZ. 2021-04-18T00:26:56.19 0.3 undecidable manual S 323 13.5753 165 -0.36 72
IV.TB02.DHZ.01 2021-04-18T00:26:56.55 0.3 undecidable manual S 334 18.7701 160 -0.33 71
IV.MURB.HHZ. 2021-04-18T00:26:56.13 0.3 undecidable manual S 14 5.1948 174 -0.1 77
IV.TB01.DHZ. 2021-04-18T00:26:56.63 0.6 undecidable manual S 342 19.0698 160 -0.28 48
IV.ATVA.EHZ. 2021-04-18T00:26:56.83 0.6 undecidable manual S 290 19.3695 160 -0.09 50
IV.ASSB.HHZ. 2021-04-18T00:26:56.93 0.3 undecidable manual S 148 22.8549 156 -0.28 72
IV.ATCC.EHZ. 2021-04-18T00:26:56.82 0.6 undecidable manual S 109 11.1777 168 0.39 46
IV.CESX.HHE. 2021-04-18T00:26:53.48 0.1 undecidable manual P 175 67.8765 123 -0.13 90
IV.GAVE.EHN. 2021-04-18T00:26:53.74 0.1 undecidable manual P 152 66.1893 124 0.31 87
IV.SACS.HHE. 2021-04-18T00:26:53.56 0.1 undecidable manual P 230 63.5919 126 0.39 86
IV.CRE.HHZ. 2021-04-18T00:26:52.91 0.3 undecidable manual P 315 63.2922 126 -0.22 66
IV.CSP1.EHZ. 2021-04-18T00:26:52.66 0.1 undecidable manual P 104 57.9975 129 0.05 94
IV.MOMA.HHZ. 2021-04-18T00:26:51.49 0.1 undecidable manual P 174 46.2204 137 -0.04 95
IV.MML1.HNE. 2021-04-18T00:26:51.18 0.1 undecidable manual P 107 39.1275 142 0.22 94
IV.FDMO.HHZ. 2021-04-18T00:26:51.95 0.3 undecidable manual P 113 50.9157 133 0 71
IV.ARVD.HHZ. 2021-04-18T00:26:51.22 0.3 undecidable manual P 48 46.7199 136 -0.36 66
IV.MGAB.HHZ. 2021-04-18T00:26:51.82 0.6 undecidable manual P 224 46.7199 136 0.24 46
IV.CAFI.HNN. 2021-04-18T00:26:51.79 0.3 undecidable manual P 286 45.621 137 0.31 68
IV.NARO.HHZ. 2021-04-18T00:26:51.24 0.3 undecidable manual P 7 43.9227 138 -0.1 70
IV.ATPI.EHE. 2021-04-18T00:26:50.07 0.3 undecidable manual P 342 27.2505 152 -0.08 73
IV.ATMC.EHE. 2021-04-18T00:26:50.83 0.1 undecidable manual P 315 36.0417 144 0.1 96
IV.CESI.HHZ. 2021-04-18T00:26:50.96 0.3 undecidable manual P 126 39.7269 141 -0.05 72
IV.ATBU.EHZ. 2021-04-18T00:26:50.61 0.1 undecidable manual P 6 28.749 151 0.37 92
IV.PIEI.HHZ. 2021-04-18T00:26:50.72 0.1 undecidable manual P 3 35.3424 145 0.05 98
IV.ATSC.EHZ. 2021-04-18T00:26:50.21 0.1 undecidable manual P 32 26.9508 152 0.08 98
IV.BADI.EHE. 2021-04-18T00:26:50.91 0.1 undecidable manual P 327 38.8278 142 -0.02 96
IV.ATMI.HHZ. 2021-04-18T00:26:50.11 0.3 undecidable manual P 304 23.3544 156 0.17 73
IV.ATPC.HHE. 2021-04-18T00:26:50.28 0.1 undecidable manual P 352 29.4483 150 0 98
IV.FRON.EHZ. 2021-04-18T00:26:50.59 0.1 undecidable manual P 28 37.5291 143 -0.25 92
IV.SSFR.HHZ. 2021-04-18T00:26:50.30 0.3 undecidable manual P 42 32.745 147 -0.19 70
IV.FOSV.HNZ. 2021-04-18T00:26:50.00 0.3 undecidable manual P 67 22.0668 157 0.13 74
IV.MURB.HHZ. 2021-04-18T00:26:49.27 0.3 undecidable manual P 14 5.1948 174 -0.08 76
IV.TB01.DHZ. 2021-04-18T00:26:49.57 0.1 undecidable manual P 342 19.0698 160 -0.17 97
IV.ATVA.EHZ. 2021-04-18T00:26:49.71 0.1 undecidable manual P 290 19.3695 160 -0.04 100
IV.ASSB.HHZ. 2021-04-18T00:26:49.66 0.3 undecidable manual P 148 22.8549 156 -0.25 71
IV.ATCC.EHZ. 2021-04-18T00:26:49.35 0.1 undecidable manual P 109 11.1777 168 -0.11 100
IV.TB03.DHZ.01 2021-04-18T00:26:49.48 0.3 undecidable manual P 339 21.867 157 -0.38 69
IV.ATLO.HNZ. 2021-04-18T00:26:49.27 0.1 undecidable manual P 323 13.5753 165 -0.26 96
IV.TB02.DHZ.01 2021-04-18T00:26:49.62 0.3 undecidable manual P 334 18.7701 160 -0.1 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MURB.HHN. ML:1.6 0.00007725 0.9 AML other m 2021-04-18T00:26:57.21
IV.MURB.HHE. ML:1.6 0.00007855000000000001 0.92 AML other m 2021-04-18T00:26:57.25
IV.ATMI.HHN. ML:1.5 0.000059800000000000003 1.48 AML other m 2021-04-18T00:26:57.85
IV.SSFR.HHN. ML:1.5 0.00004755 0.92 AML other m 2021-04-18T00:27:00.01
IV.MOMA.HHE. ML:1.1 0.000018413305 2.54 AML other m 2021-04-18T00:27:00.46
IV.MOMA.HHN. ML:1.3 0.00003025 0.6 AML other m 2021-04-18T00:27:01.54
IV.ATMI.HHE. ML:1.4 0.00004485 0.7 AML other m 2021-04-18T00:27:02.35
IV.SSFR.HHE. ML:1.4 0.000041102070000000005 0.26 AML other m 2021-04-18T00:26:59.23
IV.PIEI.HHE. ML:1.3 0.00002770902 2.32 AML other m 2021-04-18T00:26:59.02
IV.PIEI.HHN. ML:1.2 0.000024383969999999997 2.12 AML other m 2021-04-18T00:26:59.66
IV.CESI.HHN. ML:1.1 0.000021811265 3.14 AML other m 2021-04-18T00:26:59.79
IV.CESI.HHE. ML:1.0 0.000013191965 2.32 AML other m 2021-04-18T00:26:59.40
IV.ARVD.HHE. ML:1.1 0.000020610065 2.46 AML other m 2021-04-18T00:26:59.93
IV.ARVD.HHN. ML:1.2 0.000026847635000000003 1.48 AML other m 2021-04-18T00:27:00.42
IV.NARO.HHN. ML:1.2 0.00002391193 2.02 AML other m 2021-04-18T00:27:00.92
IV.NARO.HHE. ML:1.2 0.000024775095 3.04 AML other m 2021-04-18T00:26:59.65
IV.MGAB.HHN. ML:1.0 0.000014345759 1.6 AML other m 2021-04-18T00:27:01.20
IV.MGAB.HHE. ML:1.2 0.000025307635 3.08 AML other m 2021-04-18T00:27:01.43
IV.FDMO.HHN. ML:1.0 0.00001640836 2.08 AML other m 2021-04-18T00:27:00.99
IV.FDMO.HHE. ML:1.2 0.000021576075 1.72 AML other m 2021-04-18T00:27:01.08
IV.CSP1.EHE. ML:1.8 0.000079174065 0.04 AML other m 2021-04-18T00:27:03.63
IV.CSP1.EHN. ML:1.6 0.000045730705 6.22 AML other m 2021-04-18T00:27:03.80
IV.CRE.HHE. ML:1.1 0.000016691055 2.1 AML other m 2021-04-18T00:27:02.60
IV.CRE.HHN. ML:1.1 0.000013709149999999999 0.6 AML other m 2021-04-18T00:27:02.67
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