Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 12-07-2021 and time 18:34:38 (Italy) in region 2 km NE Spoleto (PG)

A magnitude ML 1.9 earthquake occured in region: 2 km NE Spoleto (PG), on

  • 12-07-2021 16:34:38 (UTC)
  • 12-07-2021 18:34:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7450, 12.7570 at 9 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 2 38218 38218
Sant'Anatolia di Narco PG 7 564 38782
Scheggino PG 7 461 39243
Campello sul Clitunno PG 9 2442 41685
Vallo di Nera PG 9 364 42049
Castel Ritaldi PG 11 3278 45327
Ferentillo TR 14 1913 47240
Trevi PG 15 8469 55709
Poggiodomo PG 15 117 55826
Cerreto di Spoleto PG 16 1075 56901
Montefranco TR 16 1276 58177
Giano dell'Umbria PG 18 3846 62023
Arrone TR 18 2763 64786
Acquasparta TR 18 4778 69564
Montefalco PG 19 5679 75243
Monteleone di Spoleto PG 19 599 75842
Polino TR 19 233 76075
Massa Martana PG 19 3770 79845

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NE of Terni (111501 inhabitants)
24 Km S of Foligno (57155 inhabitants)
50 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
87 Km N of Tivoli (56533 inhabitants)
97 Km N of Roma (2864731 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 2021-07-12
16:34:38		 42.7453 12.7567 9 2021-12-29
11:12:21		 Bollettino Sismico Italiano INGV 94367851
Reviewed
Rev100 		ML 2.0 2021-07-12
16:34:37		 42.744 12.7458 10 2021-07-12
16:42:48		 Sala Sismica INGV-Roma 92677641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-12 16:34:38 ± 0.03
Latitude 42.7453 ± 0.0018
Longitude 12.7567 ± 0.0024
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94367851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 181
Semi-minor axis of confidence ellipse (meter) 159
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
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) 71
Number of associated phases, regardless of their use for origin computation 61
Number of defining phases 60
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.82108
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 44
Type of magnitude ML
Reference to an origin 92677641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-12 16:42:48

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 55
Type of magnitude ML
Reference to an origin 94367851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-19 10:17:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZEN8.EHZ. 2021-07-12T16:36:07.64 3.0 undecidable manual Sn 0.07 0
IV.ARVD.HHZ. 2021-07-12T16:35:03.90 0.3 undecidable manual S 10 84.8484 50 0.24 63
IV.ATVO.HHZ. 2021-07-12T16:35:01.77 0.6 undecidable manual S 338 76.1682 50 0.44 41
IV.CING.HHZ. 2021-07-12T16:35:01.82 0.6 undecidable manual S 27 78.4659 50 -0.13 44
IV.EL6.EHZ. 2021-07-12T16:35:00.22 0.3 undecidable manual S 23 70.5738 50 0.37 63
IV.TERO.HHZ. 2021-07-12T16:34:59.64 0.3 undecidable manual S 101 70.374 50 -0.17 66
IV.FIAM.HHZ. 2021-07-12T16:34:57.24 0.3 undecidable manual S 151 60.5949 50 0.05 69
IV.SRES.HHZ. 2021-07-12T16:34:57.12 0.3 undecidable manual S 200 59.8956 50 0.12 68
IV.MURB.HHZ. 2021-07-12T16:34:57.60 0.6 undecidable manual S 342 60.3951 50 0.46 42
IV.FOSV.EHZ. 2021-07-12T16:34:57.68 0.6 undecidable manual S 0 60.9945 50 0.39 43
IV.CSP1.EHZ. 2021-07-12T16:34:55.18 0.3 undecidable manual S 43 52.9026 50 0.04 70
IV.CAFI.HHZ. 2021-07-12T16:34:54.22 1.0 undecidable manual P 316 91.1421 50 0.43 20
IV.MMO1.EHZ. 2021-07-12T16:34:54.10 0.3 undecidable manual S 70 49.4172 50 -0.11 70
IV.SMA1.EHZ. 2021-07-12T16:34:54.45 0.3 undecidable manual S 105 48.8178 50 0.39 66
IV.ATCC.EHE. 2021-07-12T16:34:54.56 0.6 undecidable manual S 349 49.7169 50 0.28 45
IV.RM33.EHZ. 2021-07-12T16:34:53.26 0.6 undecidable manual S 125 45.621 50 0.07 47
IV.CERT.HHZ. 2021-07-12T16:34:53.19 0.6 undecidable manual P 168 90.243 50 -0.46 40
IV.MML1.EHZ. 2021-07-12T16:34:52.86 0.6 undecidable manual S 23 44.4222 50 -0.01 48
IV.CING.HHZ. 2021-07-12T16:34:52.22 0.6 undecidable manual P 27 78.4659 50 0.38 42
IV.FDMO.HHN. 2021-07-12T16:34:52.14 0.3 undecidable manual S 40 42.0246 50 -0.09 71
IV.ARVD.HHZ. 2021-07-12T16:34:52.57 0.6 undecidable manual P 10 84.8484 50 -0.25 42
IV.MC2.EHZ. 2021-07-12T16:34:51.91 0.6 undecidable manual S 62 39.7269 50 0.3 45
IV.ATVO.HHZ. 2021-07-12T16:34:51.40 0.6 undecidable manual P 338 76.1682 50 -0.08 44
IV.EL6.EHZ. 2021-07-12T16:34:50.63 0.3 undecidable manual P 23 70.5738 50 0.01 68
IV.TERO.HHZ. 2021-07-12T16:34:50.58 0.3 undecidable manual P 101 70.374 50 -0.02 68
IV.FOSV.EHZ. 2021-07-12T16:34:49.06 0.3 undecidable manual P 0 60.9945 50 -0.08 69
IV.FEMA.HNE. 2021-07-12T16:34:49.95 0.3 undecidable manual S 45 33.8439 50 -0.1 72
IV.CESI.HHZ. 2021-07-12T16:34:49.08 0.6 undecidable manual S 23 31.2465 106 -0.18 47
IT.MTCL.HGZ. 2021-07-12T16:34:49.86 0.3 undecidable manual S 35 33.9438 50 -0.2 70
IV.ASSB.HHZ. 2021-07-12T16:34:49.76 0.3 undecidable manual S 346 33.9438 50 -0.31 69
IV.SRES.HHZ. 2021-07-12T16:34:49.20 1.0 undecidable manual P 200 59.8956 50 0.22 22
IV.MURB.HHZ. 2021-07-12T16:34:49.17 0.3 undecidable manual P 342 60.3951 50 0.11 68
IV.NRCA.HHZ. 2021-07-12T16:34:48.97 0.3 undecidable manual S 71 30.747 106 -0.12 72
IV.FIAM.HHZ. 2021-07-12T16:34:48.72 0.3 undecidable manual P 151 60.5949 50 -0.37 65
IV.LNSS.HHZ. 2021-07-12T16:34:48.16 0.3 undecidable manual S 124 28.0497 107 -0.03 73
IV.SMA1.EHZ. 2021-07-12T16:34:47.37 0.3 undecidable manual P 105 48.8178 50 0.09 70
IV.ATCC.EHE. 2021-07-12T16:34:47.27 0.3 undecidable manual P 349 49.7169 50 -0.14 69
IV.CSP1.EHZ. 2021-07-12T16:34:47.84 0.3 undecidable manual P 43 52.9026 50 -0.07 70
IT.FOPC.HGZ. 2021-07-12T16:34:47.50 0.3 undecidable manual S 350 25.2525 109 0.21 71
IV.MMO1.EHZ. 2021-07-12T16:34:47.28 0.1 undecidable manual P 70 49.4172 50 -0.08 93
IV.FDMO.HHN. 2021-07-12T16:34:46.18 0.3 undecidable manual P 40 42.0246 50 -0.04 72
IV.MML1.EHZ. 2021-07-12T16:34:46.39 0.3 undecidable manual P 23 44.4222 50 -0.2 69
IV.RM33.EHZ. 2021-07-12T16:34:46.55 0.3 undecidable manual P 125 45.621 50 -0.23 68
IV.MC2.EHZ. 2021-07-12T16:34:45.86 0.1 undecidable manual P 62 39.7269 50 -0.01 96
IV.ARRO.EHZ. 2021-07-12T16:34:45.44 0.6 undecidable manual S 178 18.4704 115 0.35 47
IV.CESX.HHZ. 2021-07-12T16:34:45.60 0.3 undecidable manual S 222 20.5683 113 -0.16 73
IV.MOMA.HHZ. 2021-07-12T16:34:44.41 0.6 undecidable manual S 293 16.5723 118 -0.09 49
IV.NRCA.HHZ. 2021-07-12T16:34:44.30 0.1 undecidable manual P 71 30.747 106 -0.11 96
IV.FEMA.HNE. 2021-07-12T16:34:44.97 0.1 undecidable manual P 45 33.8439 50 0 98
IV.CESI.HHZ. 2021-07-12T16:34:44.35 0.3 undecidable manual P 23 31.2465 106 -0.16 71
IT.GNU.HGZ. 2021-07-12T16:34:44.40 0.3 undecidable manual S 293 16.4724 118 -0.09 74
IT.MTCL.HGZ. 2021-07-12T16:34:44.85 0.3 undecidable manual P 35 33.9438 50 -0.12 71
IV.ASSB.HHZ. 2021-07-12T16:34:44.70 0.1 undecidable manual P 346 33.9438 50 -0.28 92
IV.LNSS.HHZ. 2021-07-12T16:34:43.88 0.1 undecidable manual P 124 28.0497 107 -0.01 98
IV.GAVE.EHZ. 2021-07-12T16:34:43.55 0.3 undecidable manual S 118 12.6762 124 0.21 73
IT.FOPC.HGZ. 2021-07-12T16:34:43.46 0.3 undecidable manual P 350 25.2525 109 0.09 73
IV.ARRO.EHZ. 2021-07-12T16:34:42.29 0.3 undecidable manual P 178 18.4704 115 0.19 72
IV.CESX.HHZ. 2021-07-12T16:34:42.40 0.1 undecidable manual P 222 20.5683 113 -0.09 98
IT.GNU.HGZ. 2021-07-12T16:34:41.79 0.3 undecidable manual P 293 16.4724 118 0.03 75
IV.GAVE.EHZ. 2021-07-12T16:34:41.40 0.1 undecidable manual P 118 12.6762 124 0.31 95
IV.MOMA.HHZ. 2021-07-12T16:34:41.79 0.1 undecidable manual P 293 16.5723 118 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.HNN. ML:1.6 0.00045302435 0.1792 AML other m 2021-07-12T16:34:44.42
IV.GAVE.EHN. ML:2.1 0.0015955575 0.1792 AML other m 2021-07-12T16:34:44.42
IV.MOMA.HNN. ML:2.2 0.0014598875 0.1792 AML other m 2021-07-12T16:34:44.63
IV.MOMA.HNE. ML:2.4 0.0022649999999999997 0.18 AML other m 2021-07-12T16:34:44.74
IV.MOMA.HHE. ML:2.4 0.002505 0.18 AML other m 2021-07-12T16:34:44.74
IV.MOMA.HHN. ML:2.2 0.0015217125 0.1792 AML other m 2021-07-12T16:34:45.13
IV.CESX.HHN. ML:2.1 0.0009052396 0.256 AML other m 2021-07-12T16:34:45.85
IV.GAVE.EHE. ML:2.2 0.001839163 0.1792 AML other m 2021-07-12T16:34:46.14
IV.GAVE.HNE. ML:2.2 0.001844109 0.1792 AML other m 2021-07-12T16:34:46.14
IV.CESX.HHE. ML:2.2 0.0011571135 0.3584 AML other m 2021-07-12T16:34:46.70
IV.ARRO.EHE. ML:1.7 0.00042284255 0.2176 AML other m 2021-07-12T16:34:46.87
IV.ARRO.EHN. ML:1.6 0.00031587645 0.1792 AML other m 2021-07-12T16:34:48.01
IV.LNSS.HNE. ML:2.1 0.000725283 0.1792 AML other m 2021-07-12T16:34:48.67
IV.LNSS.HHN. ML:2.3 0.00102 1.86 AML other m 2021-07-12T16:34:48.04
IV.LNSS.HNN. ML:2.2 0.00095502445 0.1408 AML other m 2021-07-12T16:34:49.04
IV.LNSS.HHE. ML:2.2 0.00084075745 0.2304 AML other m 2021-07-12T16:34:49.41
IV.CESI.HNN. ML:2.1 0.0005579970999999999 0.1792 AML other m 2021-07-12T16:34:49.50
IV.NRCA.HHE. ML:2.0 0.0004935 0.14 AML other m 2021-07-12T16:34:49.50
IV.NRCA.HNE. ML:2.0 0.00045029955 0.1408 AML other m 2021-07-12T16:34:49.44
IV.CESI.HHN. ML:2.1 0.0006312662 0.1024 AML other m 2021-07-12T16:34:49.63
IV.ASSB.HHN. ML:2.0 0.0004515 0.22 AML other m 2021-07-12T16:34:50.29
IV.ASSB.HHE. ML:2.2 0.0006325 0.22 AML other m 2021-07-12T16:34:50.16
IV.NRCA.HHN. ML:1.9 0.00038349999999999994 0.1 AML other m 2021-07-12T16:34:51.87
IV.CESI.HNE. ML:1.8 0.0003109332 0.3456 AML other m 2021-07-12T16:34:51.95
IV.CESI.HHE. ML:1.8 0.00029390935000000003 0.32 AML other m 2021-07-12T16:34:51.96
IV.MML1.EHE. ML:1.7 0.00014666600000000002 0.2304 AML other m 2021-07-12T16:34:53.56
IV.MML1.HNN. ML:1.8 0.00018435560000000002 0.128 AML other m 2021-07-12T16:34:55.28
IV.MML1.EHN. ML:1.8 0.00017519079999999998 0.128 AML other m 2021-07-12T16:34:55.23
IV.RM33.EHN. ML:1.7 0.000134631635 0.2432 AML other m 2021-07-12T16:34:55.35
IV.CSP1.EHN. ML:2.2 0.00038714399999999996 0.3456 AML other m 2021-07-12T16:34:55.56
IV.RM33.HNE. ML:1.8 0.00020337095 0.2432 AML other m 2021-07-12T16:34:55.94
IV.RM33.EHE. ML:1.8 0.00017147645000000001 0.2432 AML other m 2021-07-12T16:34:55.95
IV.SMA1.EHN. ML:2.1 0.0003145 1.42 AML other m 2021-07-12T16:34:56.04
IV.CSP1.EHE. ML:2.3 0.00049374795 0.2816 AML other m 2021-07-12T16:34:56.19
IV.SMA1.EHE. ML:1.8 0.0001570764 0.2176 AML other m 2021-07-12T16:34:56.11
IV.MML1.HNE. ML:1.8 0.00017742305 0.4608 AML other m 2021-07-12T16:34:56.69
IV.SRES.HHE. ML:1.4 0.00005578157 0.4096 AML other m 2021-07-12T16:34:58.63
IV.FOSV.EHN. ML:1.5 0.0000661 0.2 AML other m 2021-07-12T16:34:58.77
IV.FOSV.EHE. ML:1.6 0.00008465 0.44 AML other m 2021-07-12T16:34:58.74
IV.MURB.HNN. ML:2.3 0.00039654055 0.256 AML other m 2021-07-12T16:34:58.77
IV.MURB.HHE. ML:2.5 0.0006 0.24 AML other m 2021-07-12T16:34:59.16
IV.MURB.HNE. ML:2.5 0.0006275003999999999 0.2304 AML other m 2021-07-12T16:34:59.16
IV.MURB.HHN. ML:2.4 0.0005449999999999999 0.34 AML other m 2021-07-12T16:34:59.41
IV.SRES.HHN. ML:1.4 0.00005677483999999999 0.32 AML other m 2021-07-12T16:35:00.98
IV.EL6.EHE. ML:2.0 0.00016067989999999998 0.192 AML other m 2021-07-12T16:35:01.50
IV.EL6.EHN. ML:2.0 0.00016518769999999998 0.2432 AML other m 2021-07-12T16:35:02.09
IV.CING.HHE. ML:1.6 0.000052019495 0.1792 AML other m 2021-07-12T16:35:03.85
IV.CING.HHN. ML:1.7 0.000063280255 0.1664 AML other m 2021-07-12T16:35:04.33
IV.ATVO.HHN. ML:1.5 0.0000451 0.92 AML other m 2021-07-12T16:35:05.02
IV.ARVD.HHN. ML:1.4 0.000027574 0.192 AML other m 2021-07-12T16:35:05.87
IV.ATVO.HHE. ML:1.5 0.000050950000000000005 1.28 AML other m 2021-07-12T16:35:06.34
IV.ARVD.HHE. ML:1.3 0.000023441355 0.3072 AML other m 2021-07-12T16:35:09.22
IV.CAFI.HHE. ML:1.5 0.000036400000000000004 1.16 AML other m 2021-07-12T16:35:09.23
IV.CAFI.HHN. ML:1.4 0.000030600000000000005 1.4 AML other m 2021-07-12T16:35:10.07
IV.CERT.HHN. ML:1.5 0.000035280005 0.4224 AML other m 2021-07-12T16:35:10.28
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
Waveforms Seismic signals in miniseed + resp format Download