Earthquake with magnitude of ML 1.5 on date 18-10-2021 and time 22:20:07 (Italy) in region 5 km N Spoleto (PG)

A magnitude ML 1.5 earthquake occured in region: 5 km N Spoleto (PG), on

  • 18-10-2021 20:20:07 (UTC)
  • 18-10-2021 22:20:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.776, 12.731 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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 6 2442 40660
Castel Ritaldi PG 7 3278 43938
Sant'Anatolia di Narco PG 10 564 44502
Scheggino PG 11 461 44963
Vallo di Nera PG 11 364 45327
Trevi PG 11 8469 53796
Giano dell'Umbria PG 14 3846 57642
Montefalco PG 15 5679 63321
Cerreto di Spoleto PG 16 1075 64396
Massa Martana PG 17 3770 68166
Acquasparta TR 18 4778 72944
Ferentillo TR 18 1913 74857
Poggiodomo PG 18 117 74974
Montefranco TR 20 1276 76250

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Foligno (57155 inhabitants)
25 Km N of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
65 Km NE of Viterbo (67173 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
81 Km W of Teramo (54892 inhabitants)
86 Km N of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
100 Km N of Roma (2864731 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-10-18
20:20:07
42.776 12.7308 11 2021-10-18
20:28:27
Sala Sismica INGV-Roma 96736041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 20:20:07 ± 0.04
Latitude 42.7760 ± 0.0027
Longitude 12.7308 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96736041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 382
Semi-minor axis of confidence ellipse (meter) 239
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
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 45
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 96736041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 20:28:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OT.OT17.EHZ. 2021-10-18T20:21:17.13 3.0 undecidable manual Sn 3.91 0
IV.ARVD.HHZ. 2021-10-18T20:20:34.34 3.0 undecidable manual S 0.17 0
IV.OSSC.HHZ. 2021-10-18T20:20:30.96 3.0 undecidable manual P -1.2 0
IV.EL6.EHZ. 2021-10-18T20:20:28.15 3.0 undecidable manual S -1.95 0
IV.PIEI.HHZ. 2021-10-18T20:20:23.91 3.0 positive manual P 0.51 0
IV.ARVD.HHZ. 2021-10-18T20:20:22.73 3.0 negative manual P 0.04 0
IV.MML1.EHZ. 2021-10-18T20:20:22.12 0.3 undecidable manual S 28 0.3804 50 0.33 68
IV.FDMO.HHZ. 2021-10-18T20:20:21.54 0.3 undecidable manual S 45 0.3687 50 0.11 71
IV.MC2.EHZ. 2021-10-18T20:20:21.51 0.6 undecidable manual S 68 0.3615 50 0.28 46
IV.SSFR.HHZ. 2021-10-18T20:20:21.14 3.0 positive manual P -0.15 0
IV.EL6.EHZ. 2021-10-18T20:20:20.14 3.0 negative manual P -0.26 0
IV.MF5.EHZ. 2021-10-18T20:20:19.87 3.0 undecidable manual P 0.29 0
IT.MTCL.HGN. 2021-10-18T20:20:19.12 0.3 undecidable manual S 42 0.2932 50 -0.09 72
IV.SRES.HHZ. 2021-10-18T20:20:19.67 3.0 negative manual P 0.11 0
IV.NRCA.HHZ. 2021-10-18T20:20:18.96 0.3 undecidable manual S 78 0.2869 50 -0.05 72
IV.FOSV.EHZ. 2021-10-18T20:20:18.49 3.0 positive manual P -0.17 0
IV.ASSB.HHZ. 2021-10-18T20:20:18.72 0.6 undecidable manual S 349 0.2716 50 0.16 48
IV.CESI.HHZ. 2021-10-18T20:20:18.27 0.3 undecidable manual S 29 0.2617 50 0.01 73
IV.MURB.HHZ. 2021-10-18T20:20:18.48 3.0 positive manual P -0.07 0
IV.LNSS.HHZ. 2021-10-18T20:20:18.84 0.3 undecidable manual S 127 0.286 50 -0.13 71
IV.GUMA.HHZ. 2021-10-18T20:20:18.79 3.0 positive manual P 0.08 0
IV.MGAB.HHZ. 2021-10-18T20:20:18.07 3.0 positive manual P 0.04 0
IV.SMA1.EHZ. 2021-10-18T20:20:17.71 3.0 positive manual P 0.11 0
IV.CSP1.EHZ. 2021-10-18T20:20:17.01 3.0 undecidable manual P -0.63 0
IV.CESX.HHZ. 2021-10-18T20:20:16.52 0.6 undecidable manual S 212 0.1979 116 0.15 48
IV.RM33.EHZ. 2021-10-18T20:20:16.96 3.0 undecidable manual P -0.24 0
IV.ARRO.EHZ. 2021-10-18T20:20:16.81 0.3 undecidable manual S 173 0.1988 115 0.43 67
IV.ATCC.EHZ. 2021-10-18T20:20:16.60 3.0 negative manual P -0.16 0
IV.MML1.EHZ. 2021-10-18T20:20:15.93 0.3 undecidable manual P 28 0.3804 50 0 72
IV.FDMO.HHZ. 2021-10-18T20:20:15.56 0.3 undecidable manual P 45 0.3687 50 -0.16 70
IV.MC2.EHZ. 2021-10-18T20:20:15.70 0.1 undecidable manual P 68 0.3615 50 0.1 94
IV.LNSS.HHZ. 2021-10-18T20:20:14.08 0.1 undecidable manual P 127 0.286 50 -0.22 93
IV.NRCA.HHZ. 2021-10-18T20:20:14.18 0.1 undecidable manual P 78 0.2869 50 -0.14 95
IT.MTCL.HGN. 2021-10-18T20:20:14.34 0.3 undecidable manual P 42 0.2932 50 -0.09 72
IV.FEMA.HNN. 2021-10-18T20:20:14.74 0.3 undecidable manual P 51 0.2986 50 0.22 70
IV.GAVE.EHZ. 2021-10-18T20:20:14.57 0.3 undecidable manual S 125 0.1466 123 -0.06 74
IV.MOMA.HHZ. 2021-10-18T20:20:13.67 0.3 undecidable manual S 283 0.1214 128 -0.17 74
IV.ASSB.HHZ. 2021-10-18T20:20:13.93 0.3 undecidable manual P 349 0.2716 50 -0.13 71
IV.CESI.HHZ. 2021-10-18T20:20:13.77 0.1 undecidable manual P 29 0.2617 50 -0.12 96
IT.FOPC.HGE. 2021-10-18T20:20:12.68 0.3 undecidable manual P 354 0.1943 116 -0.05 74
IV.CESX.HHZ. 2021-10-18T20:20:12.63 0.1 undecidable manual P 212 0.1979 116 -0.17 97
IV.ARRO.EHZ. 2021-10-18T20:20:12.94 0.3 undecidable manual P 173 0.1988 115 0.13 72
IV.GAVE.EHZ. 2021-10-18T20:20:11.69 0.1 undecidable manual P 125 0.1466 123 -0.11 100
IT.GNU.HGE. 2021-10-18T20:20:11.44 0.1 undecidable manual P 283 0.1214 128 0.1 98
IV.MOMA.HHZ. 2021-10-18T20:20:11.37 0.1 undecidable manual P 283 0.1214 128 0.03 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOMA.HNN. ML:2.1 0.00123 0.22 AML other m 2021-10-18T20:20:14.08
IV.MOMA.HHN. ML:2.1 0.0012109675 0.2432 AML other m 2021-10-18T20:20:14.06
IV.MOMA.HHE. ML:2.3 0.0021468915 0.2048 AML other m 2021-10-18T20:20:14.17
IV.MOMA.HNE. ML:2.3 0.001965 0.2 AML other m 2021-10-18T20:20:14.19
IV.GAVE.EHE. ML:1.8 0.00055867845 0.1152 AML other m 2021-10-18T20:20:15.10
IV.GAVE.EHN. ML:1.8 0.00053037175 0.1152 AML other m 2021-10-18T20:20:15.65
IV.CESX.HHE. ML:1.6 0.000255008 0.2432 AML other m 2021-10-18T20:20:17.38
IV.ARRO.EHE. ML:1.3 0.00013934705 0.1664 AML other m 2021-10-18T20:20:17.64
IV.ARRO.EHN. ML:1.5 0.0001972372 0.1792 AML other m 2021-10-18T20:20:17.75
IV.CESX.HHN. ML:1.6 0.0002700507 0.2688 AML other m 2021-10-18T20:20:18.30
IV.LNSS.HHE. ML:1.9 0.0003815 1.84 AML other m 2021-10-18T20:20:18.03
IV.LNSS.HHN. ML:2 0.00042839295 0.1536 AML other m 2021-10-18T20:20:19.54
IV.NRCA.HHE. ML:1.8 0.0002630388 0.1536 AML other m 2021-10-18T20:20:20.17
IV.CESI.HHN. ML:1.6 0.000195 0.36 AML other m 2021-10-18T20:20:20.28
IV.CESI.HHE. ML:1.2 8.0396085E-5 0.0768 AML other m 2021-10-18T20:20:19.87
IV.NRCA.HHN. ML:1.6 0.0001775 0.12 AML other m 2021-10-18T20:20:21.14
IV.FDMO.HHE. ML:1.5 0.0001066 0.14 AML other m 2021-10-18T20:20:21.90
IV.FDMO.HHN. ML:1.3 6.92E-5 0.16 AML other m 2021-10-18T20:20:22.06
IV.MML1.EHN. ML:1.3 6.25E-5 1.78 AML other m 2021-10-18T20:20:24.93
IV.ATCC.EHE. ML:1.6 0.00010525268 0.2304 AML other m 2021-10-18T20:20:25.39
IV.MML1.EHE. ML:1.2 5.0989205E-5 0.192 AML other m 2021-10-18T20:20:25.08
IV.ATCC.EHN. ML:1.5 9.9927665E-5 0.1408 AML other m 2021-10-18T20:20:24.52
IV.RM33.EHN. ML:1.6 9.38E-5 0.22 AML other m 2021-10-18T20:20:25.80
IV.CSP1.EHE. ML:1.8 0.000164 0.26 AML other m 2021-10-18T20:20:26.03
IV.CSP1.EHN. ML:1.7 0.00013565544 0.1664 AML other m 2021-10-18T20:20:26.24
IV.RM33.EHE. ML:1.4 7.0246545E-5 0.1792 AML other m 2021-10-18T20:20:25.93
IV.SMA1.EHN. ML:1.6 9.435E-5 0.52 AML other m 2021-10-18T20:20:26.78
IV.MGAB.HHE. ML:1.5 6.985E-5 0.16 AML other m 2021-10-18T20:20:27.08
IV.GUMA.HHE. ML:1.9 0.000179 0.26 AML other m 2021-10-18T20:20:27.44
IV.SMA1.EHE. ML:1.8 0.0001555 0.26 AML other m 2021-10-18T20:20:27.65
IV.FOSV.EHE. ML:1.3 4.7417595E-5 0.2816 AML other m 2021-10-18T20:20:27.37
IV.MURB.HHN. ML:2 0.0002145 0.22 AML other m 2021-10-18T20:20:28.11
IV.MGAB.HHN. ML:1.6 9.405E-5 0.16 AML other m 2021-10-18T20:20:28.69
IV.MURB.HHE. ML:2.2 0.0003235 0.24 AML other m 2021-10-18T20:20:29.62
IV.SRES.HHN. ML:1.1 2.705E-5 1.2 AML other m 2021-10-18T20:20:29.22
IV.GUMA.HHN. ML:1.9 0.00016758525 0.3712 AML other m 2021-10-18T20:20:30.82
IV.FOSV.EHN. ML:1.3 4.075E-5 0.3 AML other m 2021-10-18T20:20:30.77
IV.SRES.HHE. ML:1.2 3.045E-5 0.74 AML other m 2021-10-18T20:20:31.11
IV.SSFR.HHE. ML:1.6 5.745029E-5 0.192 AML other m 2021-10-18T20:20:33.08
IV.SSFR.HHN. ML:1.7 7.75E-5 0.22 AML other m 2021-10-18T20:20:32.56
IV.ARVD.HHN. ML:0.9 9.766625E-6 0.2432 AML other m 2021-10-18T20:20:36.52
IV.ARVD.HHE. ML:1 1.66E-5 1.4 AML other m 2021-10-18T20:20:35.09
IV.PIEI.HHE. ML:1.4 3.225E-5 0.5 AML other m 2021-10-18T20:20:37.21
IV.PIEI.HHN. ML:1.3 2.595E-5 0.98 AML other m 2021-10-18T20:20:37.55
IV.GAVE.HNE. ML:1.8 0.00052014435 0.1152 AML other m 2021-10-18T20:20:15.05
IV.GAVE.HNN. ML:1.4 0.00024736315 0.5888 AML other m 2021-10-18T20:20:18.16
IV.LNSS.HNE. ML:1.9 0.0003694485 0.1792 AML other m 2021-10-18T20:20:18.95
IV.LNSS.HNN. ML:1.9 0.0003900846 0.1664 AML other m 2021-10-18T20:20:19.54
IV.NRCA.HNE. ML:1.7 0.0002459834 0.1664 AML other m 2021-10-18T20:20:20.17
IV.NRCA.HNN. ML:1.6 0.00017716632 0.1152 AML other m 2021-10-18T20:20:21.20
IV.MURB.HNE. ML:2.1 0.0003034969 0.2688 AML other m 2021-10-18T20:20:29.62
IV.MURB.HNN. ML:1.9 0.00019078825 0.2304 AML other m 2021-10-18T20:20:28.12
IV.MF5.EHE. ML:1.4 4.961876E-5 0.2432 AML other m 2021-10-18T20:20:29.91
IV.MF5.EHN. ML:1.6 7.402726E-5 0.4608 AML other m 2021-10-18T20:20:31.97
IV.EL6.EHE. ML:1.6 7.5727075E-5 0.4224 AML other m 2021-10-18T20:20:36.76
IV.EL6.EHN. ML:1.6 6.662615E-5 0.1792 AML other m 2021-10-18T20:20:31.60
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