Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 25-07-2021 and time 00:51:55 (Italy) in region 5 km NE Spoleto (PG)

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

  • 24-07-2021 22:51:55 (UTC)
  • 25-07-2021 00:51:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7740, 12.7670 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
Spoleto PG 5 38218 38218
Campello sul Clitunno PG 5 2442 40660
Sant'Anatolia di Narco PG 7 564 41224
Vallo di Nera PG 8 364 41588
Scheggino PG 9 461 42049
Castel Ritaldi PG 9 3278 45327
Trevi PG 12 8469 53796
Cerreto di Spoleto PG 13 1075 54871
Poggiodomo PG 15 117 54988
Montefalco PG 16 5679 60667
Giano dell'Umbria PG 17 3846 64513
Ferentillo TR 17 1913 66426
Sellano PG 18 1079 67505
Montefranco TR 20 1276 68781
Massa Martana PG 20 3770 72551

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km S of Foligno (57155 inhabitants)
26 Km NE of Terni (111501 inhabitants)
48 Km SE of Perugia (166134 inhabitants)
67 Km NE of Viterbo (67173 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 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 2021-07-24
22:51:55		 42.774 12.7667 8 2021-12-29
11:12:17		 Bollettino Sismico Italiano INGV 93661421
Reviewed
Rev100 		ML 1.8 2021-07-24
22:51:55		 42.7698 12.7538 10 2021-07-24
23:03:23		 Sala Sismica INGV-Roma 93171201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-24 22:51:55 ± 0.03
Latitude 42.7740 ± 0.0018
Longitude 12.7667 ± 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 93661421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 173
Semi-minor axis of confidence ellipse (meter) 125
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 79
Circular confidence region, given by single value of horizontal uncertainty (meter) 180.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 60
Number of defining phases 60
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) 0.12411
Epicentral distance of station farthest from the epicenter (degree) 0.77971
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:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 58
Type of magnitude ML
Reference to an origin 93171201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-24 23:03:23

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 54
Type of magnitude ML
Reference to an origin 93661421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-04 10:01:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ATLO.EHE. 2021-07-24T22:52:16.61 0.6 undecidable manual S 334 66.6777 50 0.34 43
IV.ATVA.EHE. 2021-07-24T22:52:16.46 0.6 undecidable manual S 325 68.2761 50 -0.21 44
IV.EL6.EHZ. 2021-07-24T22:52:16.87 0.6 undecidable manual S 24 67.2771 50 0.44 42
IV.FIAM.HHZ. 2021-07-24T22:52:15.12 0.3 undecidable manual S 153 62.9925 50 -0.16 68
IV.SRES.HHN. 2021-07-24T22:52:15.75 0.6 undecidable manual S 199 63.1923 50 0.44 43
IV.FOSV.EHZ. 2021-07-24T22:52:14.21 0.6 undecidable manual S 360 57.7977 50 0.34 44
IV.MURB.HHZ. 2021-07-24T22:52:14.40 0.6 undecidable manual S 340 57.6978 50 0.55 42
IV.MGAB.HHZ. 2021-07-24T22:52:13.55 0.6 undecidable manual S 286 55.4001 50 0.3 45
IV.PF6.EHN. 2021-07-24T22:52:12.69 0.6 undecidable manual S 41 53.2023 50 0.02 48
IV.SMA1.EHZ. 2021-07-24T22:52:11.83 0.6 undecidable manual S 109 49.0176 50 0.29 45
IV.CSP1.EHZ. 2021-07-24T22:52:11.91 0.3 undecidable manual S 45 50.1165 50 0.08 71
IV.PIEI.HHZ. 2021-07-24T22:52:10.51 0.1 undecidable manual P 348 86.5467 50 0.02 89
IV.ATCC.EHZ. 2021-07-24T22:52:10.89 0.3 undecidable manual S 347 46.7199 50 -0.04 72
IV.RM33.EHZ. 2021-07-24T22:52:10.79 0.3 undecidable manual S 129 46.9197 50 -0.19 70
IV.ARVD.HHZ. 2021-07-24T22:52:09.81 0.3 undecidable manual P 10 81.5517 50 0.1 67
IV.MML1.EHZ. 2021-07-24T22:52:09.60 0.6 undecidable manual S 24 41.1255 50 0.16 47
IV.MC2.EHZ. 2021-07-24T22:52:08.72 0.3 undecidable manual S 66 37.5291 50 0.23 70
IV.ATMI.HHZ. 2021-07-24T22:52:08.73 0.6 undecidable manual P 327 74.1702 50 0.16 44
IV.FDMO.HHZ. 2021-07-24T22:52:08.87 0.6 undecidable manual S 42 39.0276 50 -0.02 49
IV.ATVA.EHE. 2021-07-24T22:52:07.37 0.1 undecidable manual P 325 68.2761 50 -0.29 87
IV.EL6.EHZ. 2021-07-24T22:52:07.82 0.3 undecidable manual P 24 67.2771 50 0.3 66
IV.ATLO.EHE. 2021-07-24T22:52:07.28 0.1 undecidable manual P 334 66.6777 50 -0.15 90
IV.SRES.HHN. 2021-07-24T22:52:07.02 0.1 undecidable manual P 199 63.1923 50 0.14 91
IT.MTCL.HGN. 2021-07-24T22:52:06.27 0.6 undecidable manual S 38 30.8469 105 -0.17 48
IV.FEMA.HNN. 2021-07-24T22:52:06.52 0.6 undecidable manual S 48 31.0467 105 0.01 50
IV.FOSV.EHZ. 2021-07-24T22:52:06.01 0.1 undecidable manual P 360 57.7977 50 -0.04 94
IV.GUMA.HHZ. 2021-07-24T22:52:06.08 0.1 undecidable manual P 55 56.1993 50 0.27 90
IV.ASSB.HHZ. 2021-07-24T22:52:06.27 0.6 undecidable manual S 344 31.0467 105 -0.23 47
IV.FIAM.HHZ. 2021-07-24T22:52:06.60 0.1 undecidable manual P 153 62.9925 50 -0.26 89
IV.CESI.HHZ. 2021-07-24T22:52:05.45 0.6 undecidable manual S 24 27.9498 106 -0.02 50
IV.MURB.HHZ. 2021-07-24T22:52:05.88 0.3 undecidable manual P 340 57.6978 50 -0.15 69
IV.LNSS.HHZ. 2021-07-24T22:52:05.78 0.6 undecidable manual S 130 29.3484 106 -0.14 48
IV.NRCA.HHZ. 2021-07-24T22:52:05.84 0.6 undecidable manual S 77 29.0487 106 0.01 50
IV.MGAB.HHZ. 2021-07-24T22:52:05.42 0.1 undecidable manual P 286 55.4001 50 -0.26 90
IV.PF6.EHN. 2021-07-24T22:52:05.31 0.3 undecidable manual P 41 53.2023 50 -0.04 71
IV.RM33.EHZ. 2021-07-24T22:52:04.11 0.1 undecidable manual P 129 46.9197 50 -0.26 91
IV.SMA1.EHZ. 2021-07-24T22:52:04.62 0.1 undecidable manual P 109 49.0176 50 -0.08 95
IV.ATCC.EHZ. 2021-07-24T22:52:04.14 0.1 negative manual P 347 46.7199 50 -0.21 93
IV.CSP1.EHZ. 2021-07-24T22:52:04.76 0.1 undecidable manual P 45 50.1165 50 -0.11 94
IV.ARRO.EHZ. 2021-07-24T22:52:03.71 0.6 undecidable manual S 180 21.6672 111 0.33 47
IV.MML1.EHZ. 2021-07-24T22:52:03.22 0.1 undecidable manual P 24 41.1255 50 -0.27 92
IT.FOPC.HGE. 2021-07-24T22:52:03.85 0.6 undecidable manual S 347 22.3554 110 0.24 48
IV.CESX.HHZ. 2021-07-24T22:52:03.78 0.6 undecidable manual S 219 23.4543 109 -0.22 48
IV.FDMO.HHZ. 2021-07-24T22:52:02.97 0.6 negative manual P 42 39.0276 50 -0.2 47
IV.MC2.EHZ. 2021-07-24T22:52:02.86 0.1 negative manual P 66 37.5291 50 -0.08 97
IV.MOMA.HHZ. 2021-07-24T22:52:01.63 0.6 undecidable manual S 282 16.3725 117 -0.07 50
IV.ASSB.HHZ. 2021-07-24T22:52:01.54 0.1 negative manual P 344 31.0467 105 -0.26 94
IV.CESI.HHZ. 2021-07-24T22:52:01.22 0.1 negative manual P 24 27.9498 106 0.02 99
IT.MTCL.HGN. 2021-07-24T22:52:01.60 0.1 undecidable manual P 38 30.8469 105 -0.16 96
IV.LNSS.HHZ. 2021-07-24T22:52:01.29 0.1 undecidable manual P 130 29.3484 106 -0.17 96
IV.FEMA.HNN. 2021-07-24T22:52:01.90 0.6 undecidable manual P 48 31.0467 105 0.1 49
IT.GNU.HGE. 2021-07-24T22:52:01.85 0.6 undecidable manual S 282 16.3725 117 0.15 49
IV.GAVE.EHZ. 2021-07-24T22:52:01.36 0.6 undecidable manual S 131 13.7751 121 0.43 47
IV.NRCA.HHZ. 2021-07-24T22:52:01.35 0.1 negative manual P 77 29.0487 106 -0.06 99
IV.CESX.HHZ. 2021-07-24T22:52:00.37 0.6 negative manual P 219 23.4543 109 0.02 50
IV.ARRO.EHZ. 2021-07-24T22:52:00.20 1.0 positive manual P 180 21.6672 111 0.21 24
IT.FOPC.HGE. 2021-07-24T22:52:00.23 0.1 undecidable manual P 347 22.3554 110 0.1 99
IT.GNU.HGE. 2021-07-24T22:51:59.13 0.3 undecidable manual P 282 16.3725 117 0.11 75
IV.MOMA.HHZ. 2021-07-24T22:51:59.12 0.1 negative manual P 282 16.3725 117 0.09 100
IV.GAVE.EHZ. 2021-07-24T22:51:58.91 0.1 negative manual P 131 13.7751 121 0.33 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHE. ML:2.2 0.001945 0.44 AML other m 2021-07-24T22:52:01.69
IV.GAVE.HNE. ML:2.2 0.00183 0.18 AML other m 2021-07-24T22:52:01.69
IV.MOMA.HHN. ML:1.9 0.0007109999999999999 1.58 AML other m 2021-07-24T22:52:02.93
IV.MOMA.HNN. ML:1.9 0.0006990000000000001 0.16 AML other m 2021-07-24T22:52:02.22
IV.MOMA.HNE. ML:2.4 0.002265 0.22 AML other m 2021-07-24T22:52:02.31
IV.GAVE.HNN. ML:1.7 0.000523 0.24 AML other m 2021-07-24T22:52:02.33
IV.MOMA.HHE. ML:2.4 0.00239 0.2 AML other m 2021-07-24T22:52:02.31
IV.GAVE.EHN. ML:2.2 0.0015750000000000002 0.16 AML other m 2021-07-24T22:52:02.22
IV.ARRO.EHN. ML:1.7 0.00032799999999999995 0.62 AML other m 2021-07-24T22:52:04.16
IV.ARRO.EHE. ML:1.8 0.000482 0.24 AML other m 2021-07-24T22:52:04.31
IV.CESX.HHN. ML:2.0 0.000617 0.54 AML other m 2021-07-24T22:52:04.52
IV.CESX.HHE. ML:2.0 0.0005980000000000001 0.32 AML other m 2021-07-24T22:52:05.52
IV.CESI.HHE. ML:1.7 0.00028199999999999997 0.34 AML other m 2021-07-24T22:52:05.84
IV.CESI.HNN. ML:1.9 0.00043031140000000004 0.1792 AML other m 2021-07-24T22:52:05.75
IV.CESI.HHN. ML:2.0 0.0004775 1.2 AML other m 2021-07-24T22:52:05.76
IV.LNSS.HHE. ML:2.3 0.001016 1 AML other m 2021-07-24T22:52:06.00
IV.LNSS.HNE. ML:2.2 0.00083941135 1.8464 AML other m 2021-07-24T22:52:06.00
IV.NRCA.HHN. ML:2.0 0.00047250000000000005 0.98 AML other m 2021-07-24T22:52:06.87
IV.LNSS.HHN. ML:2.2 0.000908 0.24 AML other m 2021-07-24T22:52:06.61
IV.LNSS.HNN. ML:2.2 0.0007620495000000001 0.2432 AML other m 2021-07-24T22:52:06.61
IV.ASSB.HHE. ML:1.8 0.00033400000000000004 0.2 AML other m 2021-07-24T22:52:06.69
IV.ASSB.HHN. ML:1.9 0.0003885 0.14 AML other m 2021-07-24T22:52:06.77
IV.NRCA.HNN. ML:1.9 0.00038012825 0.1408 AML other m 2021-07-24T22:52:06.87
IV.NRCA.HNE. ML:1.9 0.00043574675 0.192 AML other m 2021-07-24T22:52:07.13
IV.NRCA.HHE. ML:2.0 0.00047700134999999997 0.0896 AML other m 2021-07-24T22:52:07.74
IV.CESI.HNE. ML:1.7 0.0002647304 0.3072 AML other m 2021-07-24T22:52:08.47
IV.FDMO.HHE. ML:1.7 0.00017449999999999999 0.14 AML other m 2021-07-24T22:52:09.20
IV.FDMO.HHN. ML:1.6 0.0001395 0.26 AML other m 2021-07-24T22:52:09.76
IV.ATCC.EHN. ML:1.7 0.000157 0.14 AML other m 2021-07-24T22:52:11.91
IV.ATCC.EHE. ML:2.0 0.00028099999999999995 1.16 AML other m 2021-07-24T22:52:12.96
IV.RM33.EHN. ML:2.0 0.0002595 0.26 AML other m 2021-07-24T22:52:12.52
IV.RM33.HNN. ML:2.0 0.0002960046 0.256 AML other m 2021-07-24T22:52:12.52
IV.RM33.HNE. ML:1.9 0.0002240233 0.1792 AML other m 2021-07-24T22:52:12.84
IV.RM33.EHE. ML:1.9 0.00024349999999999998 0.88 AML other m 2021-07-24T22:52:12.75
IV.CSP1.EHE. ML:2.0 0.00023899999999999998 0.98 AML other m 2021-07-24T22:52:13.60
IV.CSP1.EHN. ML:2.1 0.00032 0.22 AML other m 2021-07-24T22:52:13.21
IV.SMA1.EHN. ML:2.0 0.000272 0.32 AML other m 2021-07-24T22:52:14.20
IV.MML1.HNN. ML:1.4 0.000097256465 0.2432 AML other m 2021-07-24T22:52:14.37
IV.MML1.EHN. ML:1.5 0.00010515 0.26 AML other m 2021-07-24T22:52:14.25
IV.GUMA.HHE. ML:2.0 0.000234 0.22 AML other m 2021-07-24T22:52:14.50
IV.SMA1.EHE. ML:2.1 0.0003265 0.24 AML other m 2021-07-24T22:52:14.59
IV.FOSV.EHN. ML:1.5 0.00006865 0.46 AML other m 2021-07-24T22:52:15.07
IV.MGAB.HHE. ML:1.6 0.00009875 0.38 AML other m 2021-07-24T22:52:15.16
IV.MML1.HNE. ML:1.7 0.00018417575 0.4352 AML other m 2021-07-24T22:52:15.55
IV.MML1.EHE. ML:1.6 0.00013000000000000002 0.7 AML other m 2021-07-24T22:52:15.56
IV.FIAM.HHE. ML:1.3 0.000034200000000000005 1.24 AML other m 2021-07-24T22:52:16.07
IV.FOSV.EHE. ML:1.5 0.00006475 0.52 AML other m 2021-07-24T22:52:16.31
IV.GUMA.HHN. ML:1.9 0.00016999999999999999 0.32 AML other m 2021-07-24T22:52:17.37
IV.MGAB.HHN. ML:1.8 0.00013550000000000001 0.4 AML other m 2021-07-24T22:52:18.39
IV.FIAM.HHN. ML:1.4 0.00004605 1.52 AML other m 2021-07-24T22:52:18.21
IV.PIEI.HHN. ML:1.6 0.00005235 0.34 AML other m 2021-07-24T22:52:24.35
IV.PIEI.HHE. ML:1.6 0.0000543 0.26 AML other m 2021-07-24T22:52:24.65
IV.ARVD.HHN. ML:1.0 0.00001735 0.84 AML other m 2021-07-24T22:52:27.90
IV.ARVD.HHE. ML:1.3 0.000024500000000000003 0.88 AML other m 2021-07-24T22:52:32.63
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