Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 18-08-2021 and time 23:54:50 (Italy) in region 5 km SW Corciano (PG)

A magnitude ML 1.9 earthquake occured in region: 5 km SW Corciano (PG), on

  • 18-08-2021 21:54:50 (UTC)
  • 18-08-2021 23:54:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0880, 12.2680 at 7 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
Corciano PG 5 21332 21332
Magione PG 8 14865 36197
Perugia PG 10 166134 202331
Panicale PG 15 5692 208023
Passignano sul Trasimeno PG 15 5746 213769
Torgiano PG 15 6725 220494
Deruta PG 17 9669 230163
Paciano PG 18 975 231138
Castiglione del Lago PG 18 15527 246665
Bettona PG 20 4367 251032
Piegaro PG 20 3669 254701

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km W of Perugia (166134 inhabitants)
38 Km W of Foligno (57155 inhabitants)
52 Km SE of Arezzo (99543 inhabitants)
66 Km NW of Terni (111501 inhabitants)
76 Km N of Viterbo (67173 inhabitants)
80 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 1.9 2021-08-18
21:54:50		 43.0878 12.2677 7 2021-12-29
11:12:27		 Bollettino Sismico Italiano INGV 95188891
Reviewed
Rev100 		ML 1.9 2021-08-18
21:54:50		 43.0853 12.2672 8 2021-08-18
22:03:41		 Sala Sismica INGV-Roma 94346591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-18 21:54:50 ± 0.04
Latitude 43.0878 ± 0.0018
Longitude 12.2677 ± 0.0025
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95188891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 200
Semi-minor axis of confidence ellipse (meter) 98
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) 200.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 37
Number of associated phases, regardless of their use for origin computation 80
Number of defining phases 79
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86155
Number of stations at which the event was observed 50
Number of stations from which data was used for origin computation 49
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 95188891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-08 08:05:15

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 56
Type of magnitude ML
Reference to an origin 94346591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-18 22:03:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2021-08-18T21:55:18.21 3.0 negative manual P -0.02 0
IV.EL6.EHZ. 2021-08-18T21:55:13.91 0.3 undecidable manual S 68 72.5718 50 0.36 64
IV.MPAG.EHZ. 2021-08-18T21:55:13.67 0.3 undecidable manual S 33 71.9724 50 0.28 65
IV.ARVD.HHZ. 2021-08-18T21:55:13.31 0.3 undecidable manual S 50 70.9734 50 0.2 66
IV.NARO.HHZ. 2021-08-18T21:55:11.17 0.3 undecidable manual S 23 63.2922 50 0.1 69
IV.CRE.HHZ. 2021-08-18T21:55:11.44 0.3 undecidable manual S 337 64.1913 50 0.12 68
IV.PARC.HHZ. 2021-08-18T21:55:10.84 0.3 undecidable manual S 358 62.2932 50 0.05 70
IV.SSP9.EHZ. 2021-08-18T21:55:09.09 0.3 undecidable manual S 349 55.0005 50 0.22 68
IV.MML1.EHZ. 2021-08-18T21:55:09.20 0.3 undecidable manual S 87 57.0984 50 -0.22 68
IV.SSFR.HHZ. 2021-08-18T21:55:09.52 0.3 undecidable manual S 47 56.7987 50 0.19 68
IV.CESX.HHZ. 2021-08-18T21:55:09.84 0.6 undecidable manual S 154 59.1963 50 -0.13 46
IV.PIEI.HHZ. 2021-08-18T21:55:08.49 0.3 undecidable manual S 23 54.2013 50 -0.15 69
IV.FROS.CHE. 2021-08-18T21:55:07.05 0.1 undecidable manual P 279 90.9423 50 0.25 84
IV.OSSC.HHE. 2021-08-18T21:55:07.29 0.6 undecidable manual P 301 95.6376 50 -0.22 42
IV.BARO.HNZ. 2021-08-18T21:55:07.62 0.3 undecidable manual P 191 94.8384 50 0.22 63
IV.MMO1.EHZ. 2021-08-18T21:55:06.48 1.0 undecidable manual P 103 88.4448 50 0.07 22
IV.CSNT.HHZ. 2021-08-18T21:55:06.79 0.3 undecidable manual P 299 89.7435 50 0.18 64
IV.FOSV.EHZ. 2021-08-18T21:55:06.75 0.6 undecidable manual S 60 46.0206 50 0.28 46
IV.ATPI.EHZ. 2021-08-18T21:55:05.15 0.3 undecidable manual S 15 41.7249 50 -0.16 71
IV.MOMA.HHZ. 2021-08-18T21:55:04.56 0.3 undecidable manual S 142 39.9267 50 -0.28 69
IV.CDCA.HNZ. 2021-08-18T21:55:04.94 0.6 undecidable manual S 356 41.2254 50 -0.24 46
IV.ATFO.HHZ. 2021-08-18T21:55:04.84 0.3 undecidable manual S 38 39.5271 50 0.12 71
IV.EL6.EHZ. 2021-08-18T21:55:04.10 0.3 undecidable manual P 68 72.5718 50 0.14 67
IV.CSP1.EHZ. 2021-08-18T21:55:04.43 0.6 undecidable manual P 89 75.9684 50 -0.05 45
IT.GNU.HGZ. 2021-08-18T21:55:04.51 0.6 undecidable manual S 142 39.9267 50 -0.34 45
IV.MC2.EHZ. 2021-08-18T21:55:04.97 0.3 undecidable manual P 104 77.2671 50 0.28 64
IV.SACS.HHZ. 2021-08-18T21:55:04.83 0.3 undecidable manual S 228 39.3273 50 0.15 71
IV.TB03.DHZ. 2021-08-18T21:55:03.80 0.6 undecidable manual S 18 36.6411 101 -0.02 49
IV.ARVD.HHZ. 2021-08-18T21:55:03.82 0.3 undecidable manual P 50 70.9734 50 0.11 68
IV.ARCI.HHZ. 2021-08-18T21:55:03.26 0.1 undecidable manual P 248 69.4749 50 -0.22 88
IV.TB01.DHZ.01 2021-08-18T21:55:03.03 0.3 undecidable manual S 23 35.3424 101 -0.33 69
IV.MPAG.EHZ. 2021-08-18T21:55:03.78 0.3 undecidable manual P 33 71.9724 50 -0.09 68
IV.CAFI.HHZ. 2021-08-18T21:55:03.44 0.6 undecidable manual S 318 36.2415 101 -0.23 47
IV.NRCA.HHZ. 2021-08-18T21:55:03.99 0.3 undecidable manual P 112 74.2701 50 -0.23 65
IV.ASSB.HHZ. 2021-08-18T21:55:02.45 0.3 undecidable manual S 99 32.0457 103 0.19 71
TV.SF14.HHN. 2021-08-18T21:55:02.52 0.3 undecidable manual P 235 64.5909 50 -0.22 67
IV.ATCC.EHZ. 2021-08-18T21:55:02.33 0.6 undecidable manual S 70 32.0457 103 0.09 49
IV.NARO.HHZ. 2021-08-18T21:55:02.34 0.3 undecidable manual P 23 63.2922 50 -0.18 67
IV.ATVO.HHZ. 2021-08-18T21:55:02.82 0.3 undecidable manual S 19 34.5432 102 -0.27 70
IV.PARC.HHZ. 2021-08-18T21:55:02.40 0.3 undecidable manual P 358 62.2932 50 0.03 70
IV.TB02.DHZ. 2021-08-18T21:55:02.80 0.3 undecidable manual S 20 33.3444 102 0.09 73
IV.CRE.HHZ. 2021-08-18T21:55:02.74 0.6 positive manual P 337 64.1913 50 0.07 46
IV.MCIV.CHE. 2021-08-18T21:55:01.80 0.6 undecidable manual P 235 58.9965 50 -0.08 46
IV.CESX.HHZ. 2021-08-18T21:55:01.70 0.1 undecidable manual P 154 59.1963 50 -0.19 90
IV.SSP9.EHZ. 2021-08-18T21:55:01.30 0.6 undecidable manual P 349 55.0005 50 0.04 47
TV.SF11.HHZ. 2021-08-18T21:55:01.33 0.6 undecidable manual P 243 53.6019 50 0.29 45
IV.PIEI.HHZ. 2021-08-18T21:55:01.02 0.3 undecidable manual P 23 54.2013 50 -0.1 70
IV.MML1.EHZ. 2021-08-18T21:55:01.49 0.3 undecidable manual P 87 57.0984 50 -0.08 70
TV.SF03.EHN. 2021-08-18T21:55:01.81 0.1 undecidable manual P 236 56.8986 50 0.27 89
TV.SF04.EHZ. 2021-08-18T21:55:01.77 0.1 undecidable manual P 241 56.6988 50 0.26 90
IV.MURB.HNZ. 2021-08-18T21:55:01.31 0.3 undecidable manual S 47 28.4493 104 0.27 71
IV.SSFR.HHZ. 2021-08-18T21:55:01.53 0.3 undecidable manual P 47 56.7987 50 0.01 71
IV.ATMI.HHZ. 2021-08-18T21:55:00.28 0.6 undecidable manual S 0 27.3504 105 -0.38 46
IV.APEC.HHZ. 2021-08-18T21:55:00.78 0.3 undecidable manual P 13 53.6019 50 -0.26 68
IV.ATBU.HNZ. 2021-08-18T21:55:00.38 0.1 undecidable manual P 28 48.618 50 0.11 94
IV.ATLO.EHZ. 2021-08-18T21:55:00.44 0.3 undecidable manual S 24 27.6501 105 -0.33 70
IV.ATPI.EHZ. 2021-08-18T21:54:59.05 0.3 undecidable manual P 15 41.7249 50 -0.16 71
IV.ATPC.HHZ. 2021-08-18T21:54:59.89 0.3 undecidable manual P 19 46.2204 50 0 72
IT.UMBT.HGZ. 2021-08-18T21:54:59.94 0.6 undecidable manual S 14 24.753 106 0.14 49
IV.CDCA.HNZ. 2021-08-18T21:54:59.12 0.1 undecidable manual P 356 41.2254 50 -0.01 97
IV.FOSV.EHZ. 2021-08-18T21:54:59.86 0.1 undecidable manual P 60 46.0206 50 -0.01 96
IV.CAFI.HHZ. 2021-08-18T21:54:58.21 0.1 negative manual P 318 36.2415 101 -0.04 97
IV.SACS.HHZ. 2021-08-18T21:54:58.91 0.3 undecidable manual P 228 39.3273 50 0.07 72
IV.ATMC.EHZ. 2021-08-18T21:54:58.77 0.3 undecidable manual P 351 40.3263 50 -0.21 70
IV.TB03.DHZ. 2021-08-18T21:54:58.28 0.1 undecidable manual P 18 36.6411 101 -0.06 97
IV.MOMA.HHZ. 2021-08-18T21:54:58.61 0.1 negative manual P 142 39.9267 50 -0.32 91
IV.ATVA.EHZ. 2021-08-18T21:54:58.30 0.3 undecidable manual S 4 21.1677 109 -0.33 71
IV.ATFO.HHZ. 2021-08-18T21:54:58.73 0.3 undecidable manual P 38 39.5271 50 -0.14 71
IV.TB01.DHZ.01 2021-08-18T21:54:58.04 0.1 undecidable manual P 23 35.3424 101 -0.04 98
IT.GNU.HGZ. 2021-08-18T21:54:58.56 0.1 undecidable manual P 142 39.9267 50 -0.37 90
IV.ATVO.HHZ. 2021-08-18T21:54:57.96 0.1 undecidable manual P 19 34.5432 102 0.04 98
IV.TB02.DHZ. 2021-08-18T21:54:57.76 0.1 undecidable manual P 20 33.3444 102 0.06 97
IV.MURB.HNZ. 2021-08-18T21:54:57.18 0.6 undecidable manual P 47 28.4493 104 0.44 45
IV.ASSB.HHZ. 2021-08-18T21:54:57.43 0.1 negative manual P 99 32.0457 103 -0.02 99
IV.ATCC.EHZ. 2021-08-18T21:54:57.71 0.1 negative manual P 70 32.0457 103 0.28 93
IV.ATMI.HHZ. 2021-08-18T21:54:56.62 0.3 undecidable manual P 0 27.3504 105 0.1 73
IV.ATLO.EHZ. 2021-08-18T21:54:56.82 0.3 undecidable manual P 24 27.6501 105 0.24 71
IV.MGAB.HHZ. 2021-08-18T21:54:56.06 0.6 undecidable manual P 213 23.1546 107 0.34 47
IT.UMBT.HGZ. 2021-08-18T21:54:56.26 0.1 undecidable manual P 14 24.753 106 0.23 95
IV.ATVA.EHZ. 2021-08-18T21:54:55.38 0.1 undecidable manual P 4 21.1677 109 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGAB.HHE. ML:2.0 0.000775 0.46 AML other m 2021-08-18T21:55:01.55
IV.MGAB.HNE. ML:2.0 0.000704 0.46 AML other m 2021-08-18T21:55:01.55
IV.ATMI.HHE. ML:2.4 0.001355 0.24 AML other m 2021-08-18T21:55:03.21
IV.ATCC.EHE. ML:2.2 0.0008399999999999999 0.48 AML other m 2021-08-18T21:55:03.48
IV.ATMI.HHN. ML:2.4 0.00152 0.28 AML other m 2021-08-18T21:55:03.35
IV.ASSB.HHN. ML:1.7 0.0002495 0.5 AML other m 2021-08-18T21:55:03.21
IV.MGAB.HHN. ML:2.0 0.0007239999999999999 1.38 AML other m 2021-08-18T21:55:03.13
IV.ATVO.HHE. ML:2.1 0.000479 1.8 AML other m 2021-08-18T21:55:03.01
IV.CAFI.HHE. ML:2.0 0.00042449999999999996 1.88 AML other m 2021-08-18T21:55:03.03
IV.ATCC.EHN. ML:2.2 0.0007019999999999999 1.78 AML other m 2021-08-18T21:55:04.91
IV.CAFI.HHN. ML:2.1 0.0004535 0.32 AML other m 2021-08-18T21:55:04.33
IV.ASSB.HHE. ML:1.6 0.00017999999999999998 0.76 AML other m 2021-08-18T21:55:04.74
IV.MGAB.HNN. ML:2.0 0.0006540000000000001 1.2 AML other m 2021-08-18T21:55:04.13
IV.ATFO.HHE. ML:1.8 0.0002465 0.16 AML other m 2021-08-18T21:55:05.72
IV.ATPI.EHN. ML:1.7 0.000175 0.44 AML other m 2021-08-18T21:55:05.59
IV.ATFO.HHN. ML:1.7 0.00019600000000000002 1.36 AML other m 2021-08-18T21:55:06.24
IV.SACS.HHN. ML:1.8 0.0001995 0.24 AML other m 2021-08-18T21:55:06.80
IV.MOMA.HHN. ML:1.8 0.00023299999999999997 1.72 AML other m 2021-08-18T21:55:07.90
IV.MOMA.HHE. ML:1.8 0.00023050000000000002 0.74 AML other m 2021-08-18T21:55:07.63
IV.ATVO.HHN. ML:1.8 0.000253 0.2 AML other m 2021-08-18T21:55:07.41
IV.SACS.HHE. ML:1.6 0.00014150000000000002 0.42 AML other m 2021-08-18T21:55:08.24
IV.ATPI.EHE. ML:1.7 0.00018099999999999998 0.44 AML other m 2021-08-18T21:55:08.20
IV.PIEI.HHE. ML:1.7 0.000124 0.98 AML other m 2021-08-18T21:55:10.53
IV.MML1.EHE. ML:2.0 0.0001995 0.22 AML other m 2021-08-18T21:55:10.21
IV.SSFR.HHN. ML:2.4 0.0005484999999999999 0.16 AML other m 2021-08-18T21:55:10.64
IV.SSFR.HNN. ML:2.4 0.00055 0.16 AML other m 2021-08-18T21:55:10.65
IV.SSFR.HHE. ML:2.2 0.000332 0.2 AML other m 2021-08-18T21:55:10.62
IV.SSFR.HNE. ML:2.2 0.00036199999999999996 1.34 AML other m 2021-08-18T21:55:10.73
IV.PIEI.HHN. ML:1.6 0.00008635 1.82 AML other m 2021-08-18T21:55:10.03
IV.APEC.HHN. ML:1.9 0.00017549999999999998 0.32 AML other m 2021-08-18T21:55:11.25
IV.APEC.HHE. ML:1.8 0.00015000000000000001 0.42 AML other m 2021-08-18T21:55:11.41
IV.MML1.EHN. ML:1.9 0.000185 0.42 AML other m 2021-08-18T21:55:11.47
IV.NARO.HHN. ML:1.4 0.000043249999999999994 0.9 AML other m 2021-08-18T21:55:12.25
IV.CRE.HHN. ML:2.3 0.00039200000000000004 0.26 AML other m 2021-08-18T21:55:12.42
IV.CRE.HHE. ML:2.0 0.00016849999999999998 1.2 AML other m 2021-08-18T21:55:12.65
IV.NARO.HHE. ML:1.6 0.00006819999999999999 0.88 AML other m 2021-08-18T21:55:13.27
IV.SSP9.EHE. ML:1.7 0.00011300000000000001 0.24 AML other m 2021-08-18T21:55:13.54
IV.ARVD.HHN. ML:1.6 0.00006819999999999999 0.5 AML other m 2021-08-18T21:55:14.37
IV.ARVD.HHE. ML:1.6 0.00006945 0.38 AML other m 2021-08-18T21:55:14.63
IV.PARC.HHN. ML:2.0 0.000194 0.28 AML other m 2021-08-18T21:55:14.83
IV.SSP9.EHN. ML:1.7 0.00011449999999999999 0.56 AML other m 2021-08-18T21:55:15.38
IV.MPAG.EHE. ML:1.4 0.00004495 0.72 AML other m 2021-08-18T21:55:15.58
IV.EL6.EHN. ML:2.1 0.00020549999999999998 0.46 AML other m 2021-08-18T21:55:15.36
IV.CESX.HHE. ML:1.8 0.00011999999999999999 1.32 AML other m 2021-08-18T21:55:16.19
IV.NRCA.HHN. ML:1.7 0.0000826 0.6 AML other m 2021-08-18T21:55:16.19
IV.CESX.HHN. ML:1.8 0.0001181 0.32 AML other m 2021-08-18T21:55:16.21
IV.PARC.HHE. ML:1.9 0.0001725 1.56 AML other m 2021-08-18T21:55:17.07
IV.NRCA.HHE. ML:1.7 0.00008654999999999999 0.6 AML other m 2021-08-18T21:55:17.61
IV.CSP1.EHE. ML:2.2 0.00022749999999999997 0.4 AML other m 2021-08-18T21:55:20.35
IV.EL6.EHE. ML:2.2 0.000265 1 AML other m 2021-08-18T21:55:20.69
IV.CSP1.EHN. ML:2.3 0.00032250000000000003 0.28 AML other m 2021-08-18T21:55:20.95
IV.MPAG.EHN. ML:1.3 0.00003735 0.62 AML other m 2021-08-18T21:55:24.34
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