Earthquake with magnitude of ML 0.6 on date 21-10-2021 and time 07:41:25 (UTC) in region 2 km E Nocera Umbra (PG)

A magnitude ML 0.6 earthquake occured in region: 2 km E Nocera Umbra (PG), on

  • 21-10-2021 07:41:25 (UTC)
  • 21-10-2021 09:41:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.118, 12.811 at 15 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 2 5839 5839
Valtopina PG 8 1398 7237
Sefro MC 12 422 7659
Serravalle di Chienti MC 13 1070 8729
Fiuminata MC 13 1402 10131
Gualdo Tadino PG 13 15208 25339
Pioraco MC 16 1134 26473
Assisi PG 17 28299 54772
Valfabbrica PG 18 3389 58161
Spello PG 18 8645 66806
Esanatoglia MC 19 2034 68840
Muccia MC 19 915 69755
Foligno PG 20 57155 126910

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
63 Km N of Terni (111501 inhabitants)
80 Km SW of Ancona (100861 inhabitants)
83 Km S of Fano (60888 inhabitants)
85 Km E of Arezzo (99543 inhabitants)
89 Km S of Pesaro (94582 inhabitants)
89 Km NW of Teramo (54892 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
98 Km NW of L'Aquila (69753 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 0.6 2021-10-21
07:41:25
43.1178 12.811 15 2021-10-21
07:46:15
Sala Sismica INGV-Roma 96829971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-21 07:41:25 ± 0.49
Latitude 43.1178 ± 0.0198
Longitude 12.8110 ± 0.0111
Depth (km) 15 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96829971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1825
Semi-minor axis of confidence ellipse (meter) 1261
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 183
Circular confidence region, given by single value of horizontal uncertainty (meter) 1820
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.16637
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96829971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-21 07:46:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.MAIM.HHZ. 2021-10-21T07:42:22.14 3.0 undecidable manual Sn 0.25 0
IV.OSSC.HHZ. 2021-10-21T07:42:06.57 3.0 undecidable manual S 0.63 0
IV.TRTR.HHZ. 2021-10-21T07:41:55.02 3.0 undecidable manual S -0.18 0
IV.MTRA.EHZ. 2021-10-21T07:41:44.93 3.0 undecidable manual Sg -0.29 0
IV.ASSB.HHZ. 2021-10-21T07:41:32.99 0.3 undecidable manual S 236 0.134 123 0.33 74
IV.MML1.EHZ. 2021-10-21T07:41:32.11 0.1 undecidable manual S 92 0.1169 128 -0.14 100
IV.ATCC.EHZ. 2021-10-21T07:41:32.72 0.1 undecidable manual S 298 0.1421 121 -0.12 99
IV.CESI.HHZ. 2021-10-21T07:41:32.74 0.3 undecidable manual S 149 0.1322 123 0.14 77
IV.SNTG.HHZ. 2021-10-21T07:41:31.14 0.3 undecidable manual P 35 0.1664 115 0.87 62
IV.ATCC.EHZ. 2021-10-21T07:41:29.57 0.3 undecidable manual P 298 0.1421 121 -0.33 71
IV.CESI.HHZ. 2021-10-21T07:41:29.71 0.3 undecidable manual P 149 0.1322 123 -0.05 76
IV.ASSB.HHZ. 2021-10-21T07:41:29.72 0.3 undecidable manual P 236 0.134 123 -0.07 76
IV.MML1.EHZ. 2021-10-21T07:41:29.20 0.1 undecidable manual P 92 0.1169 128 -0.35 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:0.5 2.72563945E-5 0.0576 AML other m 2021-10-21T07:41:33.35
IV.ASSB.HHE. ML:0.5 2.670569E-5 0.1408 AML other m 2021-10-21T07:41:33.76
IV.MML1.EHE. ML:0.5 2.2998025E-5 0.1408 AML other m 2021-10-21T07:41:33.28
IV.MML1.EHN. ML:0.7 3.9408505E-5 0.1792 AML other m 2021-10-21T07:41:32.47
IV.ATCC.EHE. ML:0.8 5.6597745E-5 0.1408 AML other m 2021-10-21T07:41:32.78
IV.ATCC.EHN. ML:0.7 3.8167792E-5 0.1216 AML other m 2021-10-21T07:41:33.01
IV.CESI.HHE. ML:0.5 2.74924E-5 0.16 AML other m 2021-10-21T07:41:33.15
IV.CESI.HHN. ML:0.4 1.801832E-5 0.096 AML other m 2021-10-21T07:41:32.97
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