Earthquake with magnitude of ML 0.8 on date 26-09-2021 and time 23:22:10 (Italy) in region 4 km E Nocera Umbra (PG)

A magnitude ML 0.8 earthquake occured in region: 4 km E Nocera Umbra (PG), on

  • 26-09-2021 21:22:10 (UTC)
  • 26-09-2021 23:22:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.115, 12.842 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
Nocera Umbra PG 4 5839 5839
Valtopina PG 9 1398 7237
Sefro MC 10 422 7659
Serravalle di Chienti MC 10 1070 8729
Fiuminata MC 11 1402 10131
Gualdo Tadino PG 14 15208 25339
Pioraco MC 14 1134 26473
Muccia MC 17 915 27388
Esanatoglia MC 18 2034 29422
Camerino MC 19 6974 36396
Monte Cavallo MC 19 145 36541
Pieve Torina MC 19 1458 37999
Assisi PG 19 28299 66298
Spello PG 19 8645 74943

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NE of Foligno (57155 inhabitants)
37 Km E of Perugia (166134 inhabitants)
64 Km N of Terni (111501 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
82 Km S of Fano (60888 inhabitants)
87 Km NW of Teramo (54892 inhabitants)
87 Km E of Arezzo (99543 inhabitants)
89 Km S of Pesaro (94582 inhabitants)
96 Km NW of L'Aquila (69753 inhabitants)
98 Km NE of Viterbo (67173 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 0.8 2021-09-26
21:22:10
43.1147 12.8415 11 2021-09-26
21:29:32
Sala Sismica INGV-Roma 95918991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-26 21:22:10 ± 0.06
Latitude 43.1147 ± 0.0045
Longitude 12.8415 ± 0.0025
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95918991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 470
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 1
Circular confidence region, given by single value of horizontal uncertainty (meter) 470
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.39031
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 95918991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-26 21:29:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2021-09-26T21:22:24.50 0.6 undecidable manual S 11 0.3903 90 -0.11 47
IV.SSFR.HHZ. 2021-09-26T21:22:23.07 0.6 undecidable manual S 352 0.3247 90 0.41 44
IV.MNTT.EHZ. 2021-09-26T21:22:22.10 3.0 undecidable manual P 0.44 0
IV.CSP1.EHZ. 2021-09-26T21:22:21.10 0.3 undecidable manual S 95 0.2662 90 0.17 71
IV.ATCC.EHZ. 2021-09-26T21:22:18.25 0.3 undecidable manual S 296 0.1628 90 0.37 70
IV.ARVD.HHZ. 2021-09-26T21:22:18.29 0.6 undecidable manual P 11 0.3903 90 -0.4 44
IV.FDMO.HHZ. 2021-09-26T21:22:18.74 0.3 undecidable manual S 113 0.1961 90 -0.11 73
IV.ASSB.HHZ. 2021-09-26T21:22:17.60 0.3 undecidable manual S 242 0.152 90 0.06 75
IV.SNTG.HHZ. 2021-09-26T21:22:17.61 0.3 undecidable manual S 27 0.1574 90 -0.12 73
IV.SSFR.HHZ. 2021-09-26T21:22:17.52 0.6 undecidable manual P 352 0.3247 90 -0.04 48
IV.CSP1.EHZ. 2021-09-26T21:22:16.34 0.6 positive manual P 95 0.2662 90 -0.22 47
IV.MML1.EHZ. 2021-09-26T21:22:16.30 0.3 undecidable manual S 91 0.0953 116 0.39 70
IV.CESI.HHZ. 2021-09-26T21:22:16.65 0.3 undecidable manual S 157 0.1187 97 0.07 74
IV.FDMO.HHZ. 2021-09-26T21:22:15.06 0.6 negative manual P 113 0.1961 90 -0.3 47
IV.CESI.HHZ. 2021-09-26T21:22:14.02 0.1 negative manual P 157 0.1187 97 -0.02 100
IV.ASSB.HHZ. 2021-09-26T21:22:14.44 0.6 positive manual P 242 0.152 90 -0.17 48
IV.SNTG.HHZ. 2021-09-26T21:22:14.51 0.3 undecidable manual P 27 0.1574 90 -0.2 72
IV.ATCC.EHZ. 2021-09-26T21:22:14.77 0.6 negative manual P 296 0.1628 90 -0.03 49
IV.MML1.EHZ. 2021-09-26T21:22:13.75 0.6 negative manual P 91 0.0953 116 0.09 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:0.8 5.5499415E-5 0.1152 AML other m 2021-09-26T21:22:17.77
IV.ASSB.HHE. ML:0.6 2.9462005E-5 0.1152 AML other m 2021-09-26T21:22:19.06
IV.MML1.EHE. ML:0.4 2.8310405E-5 0.1024 AML other m 2021-09-26T21:22:16.68
IV.MML1.EHN. ML:0.5 3.5720275E-5 0.1024 AML other m 2021-09-26T21:22:16.86
IV.MML1.HNE. ML:0.9 9.242966E-5 0.6784 AML other m 2021-09-26T21:22:18.73
IV.MML1.HNN. ML:0.9 8.411767E-5 0.512 AML other m 2021-09-26T21:22:18.43
IV.CESI.HHE. ML:0.6 3.8289505E-5 0.1408 AML other m 2021-09-26T21:22:16.98
IV.CESI.HHN. ML:0.5 3.74968E-5 0.1152 AML other m 2021-09-26T21:22:16.78
IV.CESI.HNE. ML:0.9 8.4412065E-5 0.3584 AML other m 2021-09-26T21:22:21.31
IV.CESI.HNN. ML:1.1 0.000131729935 0.704 AML other m 2021-09-26T21:22:15.94
IV.SNTG.HHE. ML:0.4 2.0936385E-5 0.0768 AML other m 2021-09-26T21:22:17.96
IV.SNTG.HHN. ML:0.5 2.7298535E-5 0.8192 AML other m 2021-09-26T21:22:15.86
IV.SNTG.HNE. ML:1.2 0.00012360785 0.7552 AML other m 2021-09-26T21:22:20.37
IV.SNTG.HNN. ML:1 8.8971565E-5 0.5888 AML other m 2021-09-26T21:22:15.71
IV.ATCC.EHE. ML:0.9 6.338769E-5 0.1408 AML other m 2021-09-26T21:22:18.37
IV.ATCC.EHN. ML:0.6 2.9941206E-5 0.7808 AML other m 2021-09-26T21:22:14.44
IV.FDMO.HHE. ML:0.5 1.7896785E-5 1.3696 AML other m 2021-09-26T21:22:15.10
IV.FDMO.HHN. ML:0.4 1.3967255E-5 1.2928 AML other m 2021-09-26T21:22:14.27
IV.CSP1.EHE. ML:1.2 6.865368E-5 1.152 AML other m 2021-09-26T21:22:30.36
IV.CSP1.EHN. ML:1.2 8.139016E-5 1.1008 AML other m 2021-09-26T21:22:24.92
IV.SSFR.HHE. ML:0.8 2.417416E-5 0.2048 AML other m 2021-09-26T21:22:23.51
IV.SSFR.HHN. ML:0.9 2.8060405E-5 0.1536 AML other m 2021-09-26T21:22:23.69
IV.SSFR.HNE. ML:1.5 0.00012553635 0.6784 AML other m 2021-09-26T21:22:33.35
IV.SSFR.HNN. ML:1.7 0.00019089625 0.6016 AML other m 2021-09-26T21:22:27.20
IV.ARVD.HHE. ML:1.2 5.5380245E-5 1.7536 AML other m 2021-09-26T21:22:34.14
IV.ARVD.HHN. ML:1.3 5.9060745E-5 1.7792 AML other m 2021-09-26T21:22:19.23
IV.MNTT.EHE. ML:1.9 0.00015874855 0.2048 AML other m 2021-09-26T21:22:48.44
IV.MNTT.EHN. ML:2 0.00017381775 0.8832 AML other m 2021-09-26T21:22:24.52
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