Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 15-08-2021 and time 18:05:23 (UTC) in region 7 km E Nocera Umbra (PG)

A magnitude ML 1.6 earthquake occured in region: 7 km E Nocera Umbra (PG), on

  • 15-08-2021 18:05:23 (UTC)
  • 15-08-2021 20:05:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1100, 12.8770 at 12 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
Nocera Umbra PG 7 5839 5839
Sefro MC 7 422 6261
Serravalle di Chienti MC 7 1070 7331
Fiuminata MC 10 1402 8733
Valtopina PG 11 1398 10131
Pioraco MC 12 1134 11265
Muccia MC 14 915 12180
Gualdo Tadino PG 16 15208 27388
Camerino MC 16 6974 34362
Pieve Torina MC 16 1458 35820
Monte Cavallo MC 16 145 35965
Esanatoglia MC 17 2034 37999
Pievebovigliana MC 18 866 38865
Castelraimondo MC 19 4587 43452
Fiordimonte MC 19 202 43654
Matelica MC 20 9981 53635

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Foligno (57155 inhabitants)
40 Km E of Perugia (166134 inhabitants)
64 Km NE of Terni (111501 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
83 Km S of Fano (60888 inhabitants)
84 Km NW of Teramo (54892 inhabitants)
89 Km S of Pesaro (94582 inhabitants)
90 Km E of Arezzo (99543 inhabitants)
94 Km NW of L'Aquila (69753 inhabitants)
99 Km NE 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 1.6 2021-08-15
18:05:23		 43.1095 12.8773 12 2021-12-29
11:12:31		 Bollettino Sismico Italiano INGV 95656211
Reviewed
Rev100 		ML 1.5 2021-08-15
18:05:23		 43.1083 12.8732 13 2021-08-15
18:15:11		 Sala Sismica INGV-Roma 94214541
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-15 18:05:23 ± 0.04
Latitude 43.1095 ± 0.0018
Longitude 12.8773 ± 0.0025
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95656211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 259
Semi-minor axis of confidence ellipse (meter) 85
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 45
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 47
Number of associated phases, regardless of their use for origin computation 64
Number of defining phases 64
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.06925
Epicentral distance of station farthest from the epicenter (degree) 0.56028
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:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 95656211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-20 07:43:29

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 94214541
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-15 18:15:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1299.HNN. 2021-08-15T18:05:43.83 0.6 undecidable manual S 148 62.1933 91 0.84 36
IV.NARO.HHZ. 2021-08-15T18:05:42.96 0.3 undecidable manual S 337 60.495 91 0.4 64
IV.LNSS.HNZ. 2021-08-15T18:05:42.02 0.6 undecidable manual S 167 57.6978 91 0.2 44
IV.MPAG.EHZ. 2021-08-15T18:05:42.66 0.3 undecidable manual S 351 58.3971 91 0.67 59
IV.PIEI.HHZ. 2021-08-15T18:05:41.26 0.1 undecidable manual S 330 54.8007 91 0.25 88
IV.ATPI.EHZ. 2021-08-15T18:05:40.92 0.1 undecidable manual S 315 53.9016 91 0.14 90
IV.ATBU.EHZ. 2021-08-15T18:05:40.06 0.6 undecidable manual S 327 48.5181 91 0.7 39
IV.MF5.EHZ. 2021-08-15T18:05:39.34 0.6 undecidable manual S 106 49.1175 91 -0.17 45
IV.ATVO.HHN. 2021-08-15T18:05:39.55 0.3 undecidable manual S 309 48.618 91 0.18 68
IV.ARVD.HHZ. 2021-08-15T18:05:38.10 0.1 undecidable manual S 7 43.4232 92 0.11 93
IV.MMO1.EHN. 2021-08-15T18:05:38.27 0.6 undecidable manual S 122 43.3233 92 0.32 45
IV.ATLO.EHE. 2021-08-15T18:05:38.46 0.6 undecidable manual S 301 44.3223 92 0.23 45
IV.FRON.EHZ. 2021-08-15T18:05:38.91 0.6 undecidable manual S 345 46.9197 91 -0.01 47
IV.MOMA.HNZ. 2021-08-15T18:05:37.86 1.0 undecidable manual S 216 42.1245 92 0.22 23
IV.ATFO.HHZ. 2021-08-15T18:05:36.67 0.3 undecidable manual S 319 37.7289 92 0.2 69
IV.SSFR.HHN. 2021-08-15T18:05:36.39 0.6 undecidable manual S 348 37.0296 92 0.1 47
IV.ATSC.EHE. 2021-08-15T18:05:36.46 0.6 undecidable manual S 336 38.1285 92 -0.12 47
IV.CING.HHZ. 2021-08-15T18:05:36.97 0.1 undecidable manual S 41 39.1275 92 0.12 94
IV.MURB.HHZ. 2021-08-15T18:05:35.67 0.1 undecidable manual S 301 33.2445 92 0.4 89
IV.MC2.EHZ. 2021-08-15T18:05:35.68 0.1 undecidable manual S 131 33.5442 92 0.34 90
IV.T1299.HNN. 2021-08-15T18:05:35.00 0.3 undecidable manual P 148 62.1933 91 0.06 68
IV.NRCA.HHZ. 2021-08-15T18:05:35.94 0.1 undecidable manual S 148 36.1416 92 -0.11 94
IV.EL6.EHZ. 2021-08-15T18:05:34.55 0.1 undecidable manual S 37 30.3474 93 0.04 97
IV.MPAG.EHZ. 2021-08-15T18:05:34.15 0.1 undecidable manual P 351 58.3971 91 -0.22 88
IV.NARO.HHZ. 2021-08-15T18:05:34.34 0.1 undecidable manual P 337 60.495 91 -0.35 86
IV.ATPI.EHZ. 2021-08-15T18:05:33.97 0.3 undecidable manual P 315 53.9016 91 0.3 66
IV.MF5.EHZ. 2021-08-15T18:05:33.33 0.1 undecidable manual P 106 49.1175 91 0.4 87
IV.CSP1.EHZ. 2021-08-15T18:05:33.75 0.1 undecidable manual S 94 26.5512 93 0.25 94
IV.PIEI.HHZ. 2021-08-15T18:05:33.47 0.3 undecidable manual P 330 54.8007 91 -0.33 65
IV.LNSS.HNZ. 2021-08-15T18:05:33.79 0.3 undecidable manual P 167 57.6978 91 -0.47 63
IV.PF6.EHN. 2021-08-15T18:05:33.22 0.6 undecidable manual S 83 25.8519 94 -0.09 48
IV.ATCC.EHZ. 2021-08-15T18:05:32.08 0.1 undecidable manual S 294 20.9679 96 0.07 97
IV.ATBU.EHZ. 2021-08-15T18:05:32.92 0.3 undecidable manual P 327 48.5181 91 0.08 69
IV.FRON.EHZ. 2021-08-15T18:05:32.21 0.3 undecidable manual P 345 46.9197 91 -0.38 65
IV.FOSV.EHZ. 2021-08-15T18:05:32.13 0.1 undecidable manual S 335 22.5552 95 -0.31 92
IV.FEMA.HNE. 2021-08-15T18:05:32.19 0.1 undecidable manual S 139 21.5673 96 0.04 98
IV.ATVO.HHN. 2021-08-15T18:05:32.60 0.1 undecidable manual P 309 48.618 91 -0.25 90
IV.ATLO.EHE. 2021-08-15T18:05:31.99 0.3 undecidable manual P 301 44.3223 92 -0.2 68
IV.FDMO.HHN. 2021-08-15T18:05:31.27 0.6 undecidable manual S 115 18.87 98 -0.17 48
IV.ATFO.HHZ. 2021-08-15T18:05:31.21 0.1 undecidable manual P 319 37.7289 92 0.03 95
IV.CING.HHZ. 2021-08-15T18:05:31.23 0.1 undecidable manual P 41 39.1275 92 -0.16 92
IV.ASSB.HHZ. 2021-08-15T18:05:31.34 0.1 undecidable manual S 247 19.1697 98 -0.2 96
IV.ARVD.HHZ. 2021-08-15T18:05:31.76 0.3 positive manual P 7 43.4232 92 -0.29 67
IV.MMO1.EHN. 2021-08-15T18:05:31.88 0.3 undecidable manual P 122 43.3233 92 -0.15 69
IV.MOMA.HNZ. 2021-08-15T18:05:31.78 0.6 undecidable manual P 216 42.1245 92 -0.07 47
IV.NRCA.HHZ. 2021-08-15T18:05:30.69 0.1 positive manual P 148 36.1416 92 -0.24 92
IV.SSFR.HHN. 2021-08-15T18:05:30.82 0.3 undecidable manual P 348 37.0296 92 -0.25 68
IV.ATSC.EHE. 2021-08-15T18:05:30.91 0.1 undecidable manual P 336 38.1285 92 -0.33 90
IV.MURB.HHZ. 2021-08-15T18:05:30.37 0.1 undecidable manual P 301 33.2445 92 -0.11 95
IV.MC2.EHZ. 2021-08-15T18:05:30.45 0.1 undecidable manual P 131 33.5442 92 -0.08 95
IV.MML1.EHZ. 2021-08-15T18:05:29.03 0.1 undecidable manual S 87 7.6812 137 0.26 97
IV.CSP1.EHZ. 2021-08-15T18:05:29.40 0.1 negative manual P 94 26.5512 93 -0.06 96
IV.FIU1.HNE. 2021-08-15T18:05:29.15 0.1 undecidable manual S 27 9.7791 127 -0.05 98
IV.PF6.EHN. 2021-08-15T18:05:29.18 0.1 undecidable manual P 83 25.8519 94 -0.17 94
IV.EL6.EHZ. 2021-08-15T18:05:29.94 0.1 positive manual P 37 30.3474 93 -0.1 95
IV.CESI.HHZ. 2021-08-15T18:05:29.70 0.1 undecidable manual S 169 11.7771 118 0.05 100
IV.ASSB.HHZ. 2021-08-15T18:05:28.20 0.1 undecidable manual P 247 19.1697 98 -0.13 97
IV.ATCC.EHZ. 2021-08-15T18:05:28.53 0.1 negative manual P 294 20.9679 96 -0.07 98
IV.FOSV.EHZ. 2021-08-15T18:05:28.57 0.1 undecidable manual P 335 22.5552 95 -0.28 93
IV.FDMO.HHN. 2021-08-15T18:05:28.16 0.1 negative manual P 115 18.87 98 -0.11 97
IV.FEMA.HNE. 2021-08-15T18:05:28.81 0.3 undecidable manual P 139 21.5673 96 0.13 72
IV.CESI.HHZ. 2021-08-15T18:05:27.31 0.1 positive manual P 169 11.7771 118 0.07 99
IV.MML1.EHZ. 2021-08-15T18:05:26.90 0.1 undecidable manual P 87 7.6812 137 0.17 98
IV.FIU1.HNE. 2021-08-15T18:05:26.98 0.1 undecidable manual P 27 9.7791 127 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MML1.HNE. ML:1.8 0.0009459999999999999 0.1 AML other m 2021-08-15T18:05:29.29
IV.MML1.EHE. ML:1.8 0.0009319999999999999 0.1 AML other m 2021-08-15T18:05:29.29
IV.MML1.EHN. ML:1.6 0.00048775965 0.1024 AML other m 2021-08-15T18:05:29.24
IV.MML1.HNN. ML:1.6 0.0005470111 0.0768 AML other m 2021-08-15T18:05:29.25
IV.CESI.HHE. ML:1.6 0.00044504175 0.1408 AML other m 2021-08-15T18:05:30.06
IV.CESI.HNN. ML:1.5 0.0003387879 1.8592 AML other m 2021-08-15T18:05:30.98
IV.CESI.HHN. ML:1.6 0.0003844265 0.1408 AML other m 2021-08-15T18:05:29.97
IV.CESI.HNE. ML:1.6 0.00042097235 0.1536 AML other m 2021-08-15T18:05:30.06
IV.ASSB.HHE. ML:1.7 0.00032950000000000004 0.08 AML other m 2021-08-15T18:05:31.64
IV.ASSB.HHN. ML:1.8 0.00041392735000000003 0.0768 AML other m 2021-08-15T18:05:31.83
IV.ATCC.EHE. ML:1.5 0.0002008976 0.1024 AML other m 2021-08-15T18:05:32.31
IV.FOSV.EHE. ML:1.2 0.00009075 0.1 AML other m 2021-08-15T18:05:32.45
IV.ATCC.EHN. ML:1.4 0.0001548639 0.0896 AML other m 2021-08-15T18:05:32.60
IV.FOSV.EHN. ML:1.4 0.00016243606999999998 0.2048 AML other m 2021-08-15T18:05:32.51
IV.EL6.EHE. ML:2.0 0.00045850000000000003 0.16 AML other m 2021-08-15T18:05:34.77
IV.EL6.EHN. ML:2.0 0.0004576902 0.1536 AML other m 2021-08-15T18:05:34.76
IV.NRCA.HHN. ML:1.8 0.00025608975 0.1024 AML other m 2021-08-15T18:05:36.42
IV.MURB.HHN. ML:1.8 0.000298 0.16 AML other m 2021-08-15T18:05:36.48
IV.MURB.HNE. ML:1.7 0.00021228615 0.192 AML other m 2021-08-15T18:05:36.55
IV.MURB.HHE. ML:1.7 0.00021114515 0.2432 AML other m 2021-08-15T18:05:36.24
IV.CING.HHE. ML:1.2 0.000054248592999999995 0.1664 AML other m 2021-08-15T18:05:37.32
IV.CING.HHN. ML:1.7 0.0001805 0.22 AML other m 2021-08-15T18:05:37.29
IV.ATFO.HHN. ML:1.3 0.00007975 0.16 AML other m 2021-08-15T18:05:37.54
IV.ATFO.HHE. ML:1.2 0.000055423705 0.1408 AML other m 2021-08-15T18:05:38.03
IV.NRCA.HHE. ML:1.8 0.00027150000000000004 0.16 AML other m 2021-08-15T18:05:38.12
IV.MURB.HNN. ML:1.7 0.000214747365 0.1664 AML other m 2021-08-15T18:05:36.47
IV.ARVD.HHN. ML:1.1 0.000036133965 0.1024 AML other m 2021-08-15T18:05:38.53
IV.ARVD.HHE. ML:1.2 0.0000506 0.22 AML other m 2021-08-15T18:05:38.50
IV.PIEI.HHN. ML:1.2 0.000041750000000000005 0.18 AML other m 2021-08-15T18:05:41.52
IV.PIEI.HHE. ML:1.5 0.00007549999999999999 0.16 AML other m 2021-08-15T18:05:41.93
IV.ATPI.EHE. ML:1.2 0.000037900000000000006 1.48 AML other m 2021-08-15T18:05:43.78
IV.ATPI.EHN. ML:0.9 0.000021066874999999998 0.2432 AML other m 2021-08-15T18:05:42.96
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