Earthquake with magnitude of ML 0.8 on date 30-10-2021 and time 18:01:02 (UTC) in region 1 km SE Spoleto (PG)

A magnitude ML 0.8 earthquake occured in region: 1 km SE Spoleto (PG), on

  • 30-10-2021 18:01:02 (UTC)
  • 30-10-2021 20:01:02 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.727, 12.751 at 11 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 1 38218 38218
Scheggino PG 7 461 38679
Sant'Anatolia di Narco PG 7 564 39243
Vallo di Nera PG 10 364 39607
Campello sul Clitunno PG 11 2442 42049
Ferentillo TR 12 1913 43962
Castel Ritaldi PG 13 3278 47240
Montefranco TR 14 1276 48516
Poggiodomo PG 15 117 48633
Arrone TR 16 2763 51396
Trevi PG 17 8469 59865
Acquasparta TR 17 4778 64643
Cerreto di Spoleto PG 17 1075 65718
Polino TR 18 233 65951
Giano dell'Umbria PG 19 3846 69797
Monteleone di Spoleto PG 19 599 70396
Massa Martana PG 19 3770 74166

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Terni (111501 inhabitants)
26 Km S of Foligno (57155 inhabitants)
52 Km SE of Perugia (166134 inhabitants)
63 Km NE of Viterbo (67173 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
78 Km W of Teramo (54892 inhabitants)
81 Km N of Guidonia Montecelio (88673 inhabitants)
85 Km N of Tivoli (56533 inhabitants)
95 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2021-10-30
18:01:02
42.7273 12.7507 11 2021-10-30
18:11:21
Sala Sismica INGV-Roma 97095761
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-30 18:01:02 ± 0.04
Latitude 42.7273 ± 0.0027
Longitude 12.7507 ± 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 97095761

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 401
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 226
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.49283
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 97095761
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-30 18:11:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MILZ.HHZ. 2021-10-30T18:02:50.39 3.0 undecidable manual Sn -3.74 0
IV.GIZZ.HHZ. 2021-10-30T18:02:49.34 3.0 undecidable manual Sn -1.87 0
IV.ZEN8.EHZ. 2021-10-30T18:02:35.30 3.0 undecidable manual Sg 9.42 0
IV.SCHR.EHZ. 2021-10-30T18:02:33.53 3.0 undecidable manual Sn 4.13 0
IV.MDI.HHZ. 2021-10-30T18:02:33.24 3.0 undecidable manual Sn -2.13 0
IV.TREG.EHZ. 2021-10-30T18:02:33.21 3.0 undecidable manual Sg 11.89 0
IV.ACER.HHZ. 2021-10-30T18:02:20.74 3.0 undecidable manual Sn 1.11 0
IV.HVIT.HHZ. 2021-10-30T18:02:08.05 3.0 positive manual Pn -6.02 0
IV.MTMR.EHZ. 2021-10-30T18:02:06.92 3.0 undecidable manual Sn 3.95 0
IV.OVO.HHZ. 2021-10-30T18:02:04.89 3.0 undecidable manual Sg 9.63 0
OT.OT16.EHZ. 2021-10-30T18:01:55.19 3.0 undecidable manual Sn -2.07 0
IV.GIZZ.HHZ. 2021-10-30T18:01:54.56 3.0 positive manual Pn -5.05 0
CH.BERNI.HHZ. 2021-10-30T18:01:52.84 3.0 undecidable manual Pn -4.8 0
GU.MAIM.HHZ. 2021-10-30T18:01:51.50 3.0 undecidable manual Sn 1.99 0
IV.PCN.EHZ. 2021-10-30T18:01:49.02 3.0 negative manual Pg 7.1 0
IV.PP3.EHZ. 2021-10-30T18:01:40.35 3.0 undecidable manual Sn 1.71 0
OT.OT17.EHZ. 2021-10-30T18:01:40.36 3.0 positive manual Pg 8.6 0
IV.PZUN.HHZ. 2021-10-30T18:01:38.17 3.0 negative manual Pn -3.44 0
IV.MNTT.EHZ. 2021-10-30T18:01:37.62 3.0 undecidable manual Sg 4.11 0
IV.RAVA.EHZ. 2021-10-30T18:01:31.69 3.0 positive manual Pn -1.02 0
IV.IMOL.HNZ. 2021-10-30T18:01:30.15 3.0 negative manual Pg 4.02 0
IV.NDIM.HHZ. 2021-10-30T18:01:29.29 3.0 negative manual Pn -5.79 0
IV.MTMR.EHZ. 2021-10-30T18:01:29.80 3.0 undecidable manual Pn -2.71 0
IV.PP3.EHZ. 2021-10-30T18:01:26.34 3.0 positive manual Pg 7.5 0
IT.MTCL.HGZ. 2021-10-30T18:01:20.33 3.0 undecidable manual Sn -3.98 0
IV.CSP1.EHZ. 2021-10-30T18:01:19.73 0.6 undecidable manual S 42 0.4928 50 0.31 44
IV.MML1.EHZ. 2021-10-30T18:01:17.54 0.3 undecidable manual S 23 0.4182 50 0.33 67
IV.FDMO.HHZ. 2021-10-30T18:01:16.49 0.6 undecidable manual S 38 0.3948 50 -0.04 47
IV.ASSB.HHZ. 2021-10-30T18:01:14.38 0.6 undecidable manual S 348 0.322 50 0.02 49
IV.RMP.HHZ. 2021-10-30T18:01:14.29 3.0 undecidable manual Sn -1.76 0
IV.CESI.HHZ. 2021-10-30T18:01:13.60 0.6 undecidable manual S 22 0.2995 50 -0.08 48
IV.CSP1.EHZ. 2021-10-30T18:01:12.11 0.1 undecidable manual P 42 0.4928 50 -0.1 92
IV.LNSS.HHZ. 2021-10-30T18:01:12.07 0.3 undecidable manual S 120 0.2464 50 -0.05 73
IV.FDMO.HHZ. 2021-10-30T18:01:10.59 0.3 undecidable manual P 38 0.3948 50 0.06 71
IV.MML1.EHZ. 2021-10-30T18:01:10.88 0.3 undecidable manual P 23 0.4182 50 -0.05 71
IV.MOMA.HHZ. 2021-10-30T18:01:09.21 0.6 undecidable manual S 300 0.1529 50 -0.13 50
IV.ARRO.EHZ. 2021-10-30T18:01:09.34 0.3 undecidable manual S 176 0.1484 50 0.12 73
IV.ASSB.HHZ. 2021-10-30T18:01:09.18 0.1 positive manual P 348 0.322 50 -0.1 95
IV.GAVE.EHZ. 2021-10-30T18:01:08.00 0.3 undecidable manual S 108 0.1115 132 -0.09 76
IV.CESI.HHZ. 2021-10-30T18:01:08.73 0.1 undecidable manual P 22 0.2995 50 -0.16 95
IV.LNSS.HHZ. 2021-10-30T18:01:07.91 0.1 undecidable manual P 120 0.2464 50 -0.08 97
IV.VIVA.HHZ. 2021-10-30T18:01:07.16 3.0 negative manual P -0.06 0
IV.ARRO.EHZ. 2021-10-30T18:01:06.40 0.1 undecidable manual P 176 0.1484 50 0.09 98
IV.MOMA.HHZ. 2021-10-30T18:01:06.51 0.1 undecidable manual P 300 0.1529 50 0.13 97
IV.GAVE.EHZ. 2021-10-30T18:01:05.67 0.1 undecidable manual P 108 0.1115 132 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1 0.000101 0.38 AML other m 2021-10-30T18:01:08.50
IV.GAVE.EHE. ML:1 0.0001024 0.16 AML other m 2021-10-30T18:01:09.75
IV.ARRO.EHE. ML:0.7 4.05E-5 0.6 AML other m 2021-10-30T18:01:09.54
IV.MOMA.HHE. ML:0.8 5.51E-5 1.42 AML other m 2021-10-30T18:01:10.84
IV.MOMA.HHN. ML:0.8 5.13E-5 1.4 AML other m 2021-10-30T18:01:10.04
IV.LNSS.HHE. ML:1.1 5.875E-5 1.1 AML other m 2021-10-30T18:01:12.19
IV.LNSS.HHN. ML:1.1 7.225E-5 0.16 AML other m 2021-10-30T18:01:12.69
IV.ARRO.EHN. ML:0.6 2.815E-5 0.54 AML other m 2021-10-30T18:01:13.39
IV.ASSB.HHN. ML:0.7 1.88E-5 1 AML other m 2021-10-30T18:01:15.77
IV.ASSB.HHE. ML:0.6 1.6108382E-5 1.0112 AML other m 2021-10-30T18:01:15.49
IV.GAVE.HNE. ML:1.2 0.0001875325 5.8624 AML other m 2021-10-30T18:01:08.49
IV.CESI.HHE. ML:0.6 1.4831305E-5 2.9824 AML other m 2021-10-30T18:01:15.55
IV.CESI.HHN. ML:0.8 3.1927525E-5 1.4848 AML other m 2021-10-30T18:01:14.48
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