Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 08-04-2021 and time 10:14:20 (Italy) in region Bastia Umbra (PG)

A magnitude ML 1.6 earthquake occured in region: Bastia Umbra (PG), on

  • 08-04-2021 08:14:20 (UTC)
  • 08-04-2021 10:14:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0670, 12.5540 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
Bastia Umbra PG 0 21874 21874
Assisi PG 5 28299 50173
Bettona PG 8 4367 54540
Cannara PG 8 4305 58845
Torgiano PG 11 6725 65570
Valfabbrica PG 11 3389 68959
Spello PG 13 8645 77604
Perugia PG 14 166134 243738
Deruta PG 14 9669 253407
Bevagna PG 15 5081 258488
Valtopina PG 16 1398 259886
Foligno PG 17 57155 317041
Gualdo Cattaneo PG 18 6155 323196
Nocera Umbra PG 20 5839 329035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Perugia (166134 inhabitants)
17 Km NW of Foligno (57155 inhabitants)
57 Km N of Terni (111501 inhabitants)
70 Km SE of Arezzo (99543 inhabitants)
81 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Fano (60888 inhabitants)
98 Km SW of Pesaro (94582 inhabitants)
99 Km SW of Ancona (100861 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 2021-04-08
08:14:20		 43.0673 12.5543 8 2021-07-12
16:55:12		 Bollettino Sismico Italiano INGV 90533861
Reviewed
Rev100 		ML 1.6 2021-04-08
08:14:20		 43.0608 12.5612 9 2021-04-08
08:21:19		 Sala Sismica INGV-Roma 88911741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-08 08:14:20 ± 0.06
Latitude 43.0673 ± 0.0027
Longitude 12.5543 ± 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 90533861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 306
Semi-minor axis of confidence ellipse (meter) 272
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 69
Number of associated phases, regardless of their use for origin computation 51
Number of defining phases 51
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 0.70417
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 88911741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-08 08:21:19

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 90533861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-27 12:33:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-04-08T08:14:41.26 0.3 undecidable manual S 106 65.3901 50 0.38 63
IV.SACS.HHZ. 2021-04-08T08:14:39.22 0.6 undecidable manual S 245 57.6978 50 0.41 43
IV.CAFI.HHZ. 2021-04-08T08:14:39.05 0.6 undecidable manual S 302 55.6998 50 0.76 38
IV.CSP1.EHZ. 2021-04-08T08:14:37.76 0.3 undecidable manual S 87 52.8027 50 0.25 67
IV.PIEI.HHZ. 2021-04-08T08:14:37.62 0.3 undecidable manual S 358 52.0035 50 0.33 66
IV.ATPC.HHE. 2021-04-08T08:14:36.04 0.3 undecidable manual S 350 46.5201 50 0.2 68
IV.ATBU.EHZ. 2021-04-08T08:14:36.17 0.3 undecidable manual S 359 45.3213 50 0.66 60
IV.ATPI.EHE. 2021-04-08T08:14:35.07 0.3 undecidable manual S 344 44.2224 50 -0.16 69
IV.SSFR.HHZ. 2021-04-08T08:14:35.31 0.3 undecidable manual S 24 44.9217 50 -0.09 70
IV.ATSC.EHE. 2021-04-08T08:14:34.40 0.3 undecidable manual S 15 41.0256 50 0.04 71
IV.MGAB.HHZ. 2021-04-08T08:14:34.09 0.3 undecidable manual S 245 39.7269 50 0.06 71
IV.FDMO.HHZ. 2021-04-08T08:14:34.85 0.3 undecidable manual S 94 43.3233 50 -0.14 70
IV.CRE.HHZ. 2021-04-08T08:14:34.77 0.3 undecidable manual P 322 78.1662 50 0.64 57
IV.TB03.DHZ.01 2021-04-08T08:14:33.82 0.3 undecidable manual S 343 38.8278 50 0.04 72
IV.ATMI.HHZ. 2021-04-08T08:14:32.92 0.6 undecidable manual S 322 37.5291 50 -0.53 43
IV.MMO1.EHZ. 2021-04-08T08:14:32.05 0.3 undecidable manual P 106 65.3901 50 -0.11 67
IV.MML1.HNE. 2021-04-08T08:14:32.14 0.3 undecidable manual S 81 34.2435 103 -0.31 68
IV.ATFO.HHZ. 2021-04-08T08:14:32.17 0.3 undecidable manual S 2 33.2445 103 0.05 72
IV.FOSV.HNZ. 2021-04-08T08:14:31.51 0.3 undecidable manual S 33 30.2475 105 0.38 68
IV.SACS.HHZ. 2021-04-08T08:14:31.68 0.3 undecidable manual P 245 57.6978 50 0.71 58
IV.MOMA.HHZ. 2021-04-08T08:14:31.02 0.3 undecidable manual S 177 29.2485 105 0.23 70
IV.CAFI.HHZ. 2021-04-08T08:14:30.87 0.3 undecidable manual P 302 55.6998 50 0.2 67
IV.ATLO.EHE. 2021-04-08T08:14:30.84 0.3 undecidable manual S 337 29.9478 105 -0.18 71
IV.ATVA.EHE. 2021-04-08T08:14:30.93 0.3 undecidable manual S 317 31.9458 104 -0.77 59
IV.CESI.HHZ. 2021-04-08T08:14:30.69 0.3 undecidable manual S 104 29.2485 105 -0.09 72
IV.CSP1.EHZ. 2021-04-08T08:14:30.05 0.1 undecidable manual P 87 52.8027 50 -0.17 91
IV.ATBU.EHZ. 2021-04-08T08:14:29.11 0.3 undecidable manual P 359 45.3213 50 0.04 71
IV.ATPC.HHE. 2021-04-08T08:14:29.14 0.1 undecidable manual P 350 46.5201 50 -0.12 93
IV.PIEI.HHZ. 2021-04-08T08:14:29.94 0.3 undecidable manual P 358 52.0035 50 -0.16 68
IV.FDMO.HHZ. 2021-04-08T08:14:28.46 0.1 positive manual P 94 43.3233 50 -0.3 90
IV.MURB.HHZ. 2021-04-08T08:14:28.75 0.3 undecidable manual S 354 21.867 110 0.42 68
IV.SSFR.HHZ. 2021-04-08T08:14:28.75 0.1 undecidable manual P 24 44.9217 50 -0.25 90
IV.ATSC.EHE. 2021-04-08T08:14:28.04 0.3 undecidable manual P 15 41.0256 50 -0.36 67
IV.MGAB.HHZ. 2021-04-08T08:14:28.03 0.3 undecidable manual P 245 39.7269 50 -0.19 69
IV.ATPI.EHE. 2021-04-08T08:14:28.17 0.3 undecidable manual P 344 44.2224 50 -0.74 59
IV.ATFO.HHZ. 2021-04-08T08:14:27.17 0.3 undecidable manual P 2 33.2445 103 0.06 72
IV.TB03.DHZ.01 2021-04-08T08:14:27.69 0.1 undecidable manual P 343 38.8278 50 -0.38 89
IV.ATMI.HHZ. 2021-04-08T08:14:27.84 0.3 undecidable manual P 322 37.5291 50 -0.04 72
IV.MML1.HNE. 2021-04-08T08:14:27.05 0.1 undecidable manual P 81 34.2435 103 -0.25 92
IV.TB02.DHZ.01 2021-04-08T08:14:27.26 0.3 undecidable manual P 341 35.6421 50 -0.31 68
IV.ATCC.EHZ. 2021-04-08T08:14:26.61 0.3 undecidable manual S 28 14.7741 118 0.51 67
IV.MOMA.HHZ. 2021-04-08T08:14:26.14 0.1 undecidable manual P 177 29.2485 105 -0.2 94
IV.FOSV.HNZ. 2021-04-08T08:14:26.35 1.0 undecidable manual P 33 30.2475 105 -0.19 23
IV.ATLO.EHE. 2021-04-08T08:14:26.22 0.1 undecidable manual P 337 29.9478 105 -0.25 93
IV.ATVA.EHE. 2021-04-08T08:14:26.48 0.6 undecidable manual P 317 31.9458 104 -0.39 45
IT.GNU.HGZ. 2021-04-08T08:14:26.86 1.0 undecidable manual P 177 29.2485 105 0.52 22
IV.CESI.HHZ. 2021-04-08T08:14:26.20 0.1 undecidable manual P 104 29.2485 105 -0.14 95
IV.MURB.HHZ. 2021-04-08T08:14:25.15 0.1 positive manual P 354 21.867 110 0.23 95
IV.ASSB.HHZ. 2021-04-08T08:14:24.47 0.1 undecidable manual S 108 8.88 132 0.06 100
IV.ATCC.EHZ. 2021-04-08T08:14:23.91 0.1 positive manual P 28 14.7741 118 0.28 95
IV.ASSB.HHZ. 2021-04-08T08:14:22.85 0.1 positive manual P 108 8.88 132 0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.7 0.00087792615 0.096 AML other m 2021-04-08T08:14:24.62
IV.ASSB.HHE. ML:1.4 0.00040596305 0.096 AML other m 2021-04-08T08:14:25.51
IV.ATCC.EHE. ML:1.9 0.0007840725 0.16 AML other m 2021-04-08T08:14:27.22
IV.ATCC.EHN. ML:2.1 0.0012064305 0.2048 AML other m 2021-04-08T08:14:27.32
IV.MURB.HHE. ML:2.5 0.0021946355 0.2816 AML other m 2021-04-08T08:14:29.28
IV.MURB.HNE. ML:2.4 0.001874504 0.2304 AML other m 2021-04-08T08:14:29.31
IV.MURB.HNN. ML:2.3 0.001304039 0.3904 AML other m 2021-04-08T08:14:29.85
IV.MURB.HHN. ML:2.3 0.00143 0.32 AML other m 2021-04-08T08:14:30.18
IV.CESI.HHE. ML:1.0 0.00005686057 0.16 AML other m 2021-04-08T08:14:31.00
IV.MOMA.HHE. ML:1.4 0.00012591734999999998 0.2176 AML other m 2021-04-08T08:14:31.65
IV.CESI.HHN. ML:1.2 0.000077444945 0.1408 AML other m 2021-04-08T08:14:31.88
IV.ATFO.HHN. ML:1.5 0.00014761385 0.2048 AML other m 2021-04-08T08:14:32.79
IV.MOMA.HHN. ML:1.4 0.000121 0.44 AML other m 2021-04-08T08:14:33.52
IV.ATFO.HHE. ML:1.5 0.00013368459999999998 0.1216 AML other m 2021-04-08T08:14:33.10
IV.MGAB.HHE. ML:1.6 0.00012470945 0.1792 AML other m 2021-04-08T08:14:35.61
IV.ATMI.HHE. ML:1.5 0.00011932308999999999 0.2816 AML other m 2021-04-08T08:14:35.52
IV.FDMO.HHN. ML:1.2 0.000056656075 0.1408 AML other m 2021-04-08T08:14:36.10
IV.MGAB.HHN. ML:1.7 0.00018533335000000002 0.1408 AML other m 2021-04-08T08:14:35.19
IV.ATMI.HHN. ML:1.6 0.00016107175 0.3008 AML other m 2021-04-08T08:14:35.03
IV.SSFR.HHE. ML:2.0 0.00030980950000000004 0.16 AML other m 2021-04-08T08:14:35.95
IV.SSFR.HHN. ML:1.7 0.00016718060000000002 0.1216 AML other m 2021-04-08T08:14:36.79
IV.FDMO.HHE. ML:1.3 0.00006182251500000001 0.16 AML other m 2021-04-08T08:14:36.22
IV.PIEI.HHN. ML:1.4 0.0000656 0.28 AML other m 2021-04-08T08:14:38.37
IV.CAFI.HHE. ML:1.1 0.00003135 0.18 AML other m 2021-04-08T08:14:39.92
IV.PIEI.HHE. ML:1.4 0.0000605 0.14 AML other m 2021-04-08T08:14:39.91
IV.CAFI.HHN. ML:1.0 0.00002665 1.14 AML other m 2021-04-08T08:14:40.31
IV.MGAB.HNN. ML:1.7 0.00017475532949999997 0.1472 AML other m 2021-04-08T08:14:35.26
IV.MGAB.HNE. ML:1.6 0.0001318808 0.1792 AML other m 2021-04-08T08:14:35.61
IV.SSFR.HNN. ML:1.9 0.0002401172 0.1344 AML other m 2021-04-08T08:14:36.73
IV.SSFR.HNE. ML:1.9 0.00022560799999999997 0 AML other m 2021-04-08T08:14:36.04
IV.CSP1.EHN. ML:1.8 0.0001482027 0.1344 AML other m 2021-04-08T08:14:38.88
IV.CSP1.EHE. ML:1.6 0.00009823305000000001 0.1984 AML other m 2021-04-08T08:14:38.36
IV.SACS.HHE. ML:1.1 0.00002583962 0.1984 AML other m 2021-04-08T08:14:43.59
IV.SACS.HHN. ML:1.3 0.000039524410000000005 0.4224 AML other m 2021-04-08T08:14:40.44
IV.CRE.HHE. ML:1.0 0.000013191715 0.416 AML other m 2021-04-08T08:14:47.85
IV.CRE.HHN. ML:1.2 0.000019786311500000002 0.3008 AML other m 2021-04-08T08:14:50.04
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