Earthquake with magnitude of ML 1.0 on date 23-10-2021 and time 17:32:53 (UTC) in region 6 km S Gualdo Tadino (PG)

A magnitude ML 1.0 earthquake occured in region: 6 km S Gualdo Tadino (PG), on

  • 23-10-2021 17:32:53 (UTC)
  • 23-10-2021 19:32:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.177, 12.787 at 17 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
Gualdo Tadino PG 6 15208 15208
Nocera Umbra PG 7 5839 21047
Fiuminata MC 12 1402 22449
Valtopina PG 13 1398 23847
Fossato di Vico PG 13 2840 26687
Sefro MC 14 422 27109
Valfabbrica PG 15 3389 30498
Esanatoglia MC 16 2034 32532
Pioraco MC 16 1134 33666
Sigillo PG 18 2404 36070
Serravalle di Chienti MC 18 1070 37140
Assisi PG 18 28299 65439

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Foligno (57155 inhabitants)
33 Km E of Perugia (166134 inhabitants)
69 Km N of Terni (111501 inhabitants)
77 Km S of Fano (60888 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
80 Km E of Arezzo (99543 inhabitants)
82 Km S of Pesaro (94582 inhabitants)
94 Km NW of Teramo (54892 inhabitants)
100 Km S of Rimini (147750 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 1.0 2021-10-23
17:32:53
43.1768 12.7868 17 2021-10-23
17:41:09
Sala Sismica INGV-Roma 96914161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-23 17:32:53 ± 0.11
Latitude 43.1768 ± 0.0045
Longitude 12.7868 ± 0.0049
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96914161

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 560
Semi-minor axis of confidence ellipse (meter) 59
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 18
Circular confidence region, given by single value of horizontal uncertainty (meter) 560
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 20
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
Epicentral distance of station farthest from the epicenter (degree) 0.4029
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 96914161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-23 17:41:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BULT.EHZ. 2021-10-23T17:33:41.97 3.0 undecidable manual Sg 11.93 0
IV.TDS.HHZ. 2021-10-23T17:33:30.36 3.0 undecidable manual Sn -9.99 0
IX.SCL3.EHZ.02 2021-10-23T17:33:28.39 3.0 undecidable manual Sg 10.52 0
IV.SBPO.HNZ. 2021-10-23T17:33:19.43 3.0 undecidable manual Sn -5.31 0
IV.MAGA.HHZ. 2021-10-23T17:33:11.82 3.0 negative manual Pg 20.91 0
IV.VARE.HHZ. 2021-10-23T17:33:11.47 3.0 undecidable manual Pn 11.15 0
IV.PIEI.HHZ. 2021-10-23T17:33:08.38 0.3 undecidable manual S 333 0.4029 100 -0.09 72
IV.CMPR.HHZ. 2021-10-23T17:33:08.18 3.0 undecidable manual Sn -9.99 0
IV.CSP1.EHZ. 2021-10-23T17:33:06.38 0.1 undecidable manual S 105 0.3166 104 0.41 91
IV.GIZZ.HHZ. 2021-10-23T17:33:04.19 3.0 negative manual Pg 7.12 0
IV.FDMO.HHZ. 2021-10-23T17:33:04.57 0.6 undecidable manual S 122 0.2599 108 0.21 48
IV.EL6.EHZ. 2021-10-23T17:33:04.90 0.3 undecidable manual S 56 0.2752 107 0.11 72
IV.MURB.HHZ. 2021-10-23T17:33:03.27 0.1 undecidable manual S 294 0.2095 114 0.31 94
IV.CESI.HHZ. 2021-10-23T17:33:02.74 0.1 undecidable manual S 153 0.1925 117 0.24 97
IV.IMOL.HNZ. 2021-10-23T17:33:02.73 3.0 undecidable manual Sn -5.93 0
IV.PIEI.HHZ. 2021-10-23T17:33:02.98 0.6 undecidable manual P 333 0.4029 100 0.65 41
IV.IOCA.HHZ. 2021-10-23T17:33:02.29 3.0 undecidable manual Sg -0.71 0
IV.ASSB.HHZ. 2021-10-23T17:33:01.81 0.3 undecidable manual S 215 0.1637 122 0.05 76
IV.MML1.EHZ. 2021-10-23T17:33:01.53 0.3 undecidable manual S 115 0.1493 126 0.13 75
IV.EL6.EHZ. 2021-10-23T17:33:00.03 0.3 undecidable manual P 56 0.2752 107 -0.18 72
IV.CSP1.EHZ. 2021-10-23T17:33:00.78 0.3 undecidable manual P 105 0.3166 104 -0.11 72
IV.MOCO.HHZ. 2021-10-23T17:33:00.03 3.0 undecidable manual Sn -7.19 0
IV.ATCC.EHZ. 2021-10-23T17:33:00.55 0.3 undecidable manual S 275 0.107 137 0.08 76
IV.SNTG.HHZ. 2021-10-23T17:33:00.81 0.3 undecidable manual S 55 0.1367 129 -0.3 73
IV.MNTT.EHZ. 2021-10-23T17:32:59.66 3.0 undecidable manual Sg 7.2 0
CR.STON.BHZ. 2021-10-23T17:32:59.54 3.0 undecidable manual Pn 8.89 0
IV.FDMO.HHZ. 2021-10-23T17:32:59.74 0.3 undecidable manual P 122 0.2599 108 -0.23 71
IV.MURB.HHZ. 2021-10-23T17:32:58.99 0.1 undecidable manual P 294 0.2095 114 -0.16 98
IV.MML1.EHZ. 2021-10-23T17:32:58.09 0.1 undecidable manual P 115 0.1493 126 -0.16 99
IV.ASSB.HHZ. 2021-10-23T17:32:58.40 0.1 undecidable manual P 215 0.1637 122 -0.06 100
IV.CESI.HHZ. 2021-10-23T17:32:58.73 0.1 undecidable manual P 153 0.1925 117 -0.15 98
IV.ATCC.EHZ. 2021-10-23T17:32:57.56 0.1 undecidable manual P 275 0.107 137 -0.16 100
IV.SNTG.HHZ. 2021-10-23T17:32:57.86 0.1 undecidable manual P 55 0.1367 129 -0.22 98
IV.MTMR.EHZ. 2021-10-23T17:32:56.84 3.0 undecidable manual Sn -9.99 0
IV.NARO.HHZ. 2021-10-23T17:32:53.86 3.0 undecidable manual Sn -1.93 0
IV.FIAM.HHZ. 2021-10-23T17:32:53.40 3.0 undecidable manual Sg 5.63 0
IV.MDI.HHZ. 2021-10-23T17:32:51.61 3.0 undecidable manual Pn -2.91 0
GU.GBOS.HHZ. 2021-10-23T17:32:50.44 3.0 undecidable manual Pn -3.69 0
IV.CMPR.HHZ. 2021-10-23T17:32:42.32 3.0 undecidable manual Pg 2.4 0
IV.MOCO.HHZ. 2021-10-23T17:32:36.15 3.0 undecidable manual Pg 3.67 0
IV.MTMR.EHZ. 2021-10-23T17:32:36.07 3.0 negative manual Pg 2.12 0
IV.ICAI.EHZ. 2021-10-23T17:32:22.64 3.0 positive manual P -7.8 0
IV.LRP.EHZ. 2021-10-23T17:32:18.43 3.0 undecidable manual P -5.44 0
IV.VIVA.HHZ. 2021-10-23T17:32:17.06 3.0 negative manual P -5.15 0
IV.RCAV.EHZ. 2021-10-23T17:32:17.74 3.0 undecidable manual P -4.27 0
IV.RMP.HHZ. 2021-10-23T17:32:16.47 3.0 positive manual P -5.53 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CMPR.HHN. ML:2.8 4.605E-5 0.54 AML other m 2021-10-23T17:32:56.86
IV.ASSB.HHE. ML:1.1 8.54E-5 1.68 AML other m 2021-10-23T17:33:01.91
IV.ASSB.HHN. ML:1 6.075E-5 1.58 AML other m 2021-10-23T17:33:02.93
IV.IMOL.HNE. ML:3.4 0.001235 0.52 AML other m 2021-10-23T17:33:08.96
IV.CMPR.HHE. ML:2.8 3.94E-5 0.8 AML other m 2021-10-23T17:33:13.71
IV.IMOL.HNN. ML:3.4 0.00133 0.06 AML other m 2021-10-23T17:33:41.22
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