Earthquake with magnitude of ML 1.7 on date 22-08-2021 and time 15:36:37 (Italy) in region 8 km N Sellano (PG)

A magnitude ML 1.7 earthquake occured in region: 8 km N Sellano (PG), on

  • 22-08-2021 13:36:37 (UTC)
  • 22-08-2021 15:36:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.958, 12.905 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
Sellano PG 8 1079 1079
Monte Cavallo MC 9 145 1224
Serravalle di Chienti MC 13 1070 2294
Preci PG 14 724 3018
Visso MC 15 1107 4125
Pieve Torina MC 15 1458 5583
Cerreto di Spoleto PG 15 1075 6658
Trevi PG 16 8469 15127
Foligno PG 16 57155 72282
Valtopina PG 17 1398 73680
Fiordimonte MC 18 202 73882
Muccia MC 18 915 74797
Campello sul Clitunno PG 18 2442 77239
Pievebovigliana MC 19 866 78105
Ussita MC 19 444 78549
Spello PG 19 8645 87194
Nocera Umbra PG 19 5839 93033

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km E of Foligno (57155 inhabitants)
45 Km E of Perugia (166134 inhabitants)
49 Km NE of Terni (111501 inhabitants)
73 Km W of Teramo (54892 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
89 Km NE of Viterbo (67173 inhabitants)
99 Km S of Fano (60888 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 1.7 2021-08-22
13:36:37
42.9582 12.9048 10 2021-08-22
13:45:46
Sala Sismica INGV-Roma 94500491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 13:36:37 ± 0.04
Latitude 42.9582 ± 0.0027
Longitude 12.9048 ± 0.0025
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94500491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 269
Semi-minor axis of confidence ellipse (meter) 213
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 27
Circular confidence region, given by single value of horizontal uncertainty (meter) 270
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.69338
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 24
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 36
Type of magnitude ML
Reference to an origin 94500491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-22 13:45:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CELB.HHZ. 2021-08-22T13:37:39.35 3.0 undecidable manual Sn 3.23 0
IV.LRP.EHZ. 2021-08-22T13:37:19.75 3.0 undecidable manual S -2.38 0
IV.POFI.HHZ. 2021-08-22T13:37:00.77 3.0 undecidable manual P -1.23 0
IV.CPGN.EHZ. 2021-08-22T13:36:53.34 3.0 negative manual P -2.04 0
IV.MURB.HHZ. 2021-08-22T13:36:52.39 0.1 undecidable manual S 318 0.4119 50 0.5 85
IV.EL6.EHZ. 2021-08-22T13:36:51.79 0.1 undecidable manual S 21 0.3975 50 0.32 89
IV.NARO.HHZ. 2021-08-22T13:36:50.16 0.6 undecidable manual P 340 0.6934 50 -0.26 42
IV.MPAG.EHZ. 2021-08-22T13:36:50.32 1.0 undecidable manual P 351 0.679 50 0.16 22
IV.PIEI.HHZ. 2021-08-22T13:36:49.25 1.0 undecidable manual P 335 0.6367 50 -0.2 22
IV.MOMA.HHZ. 2021-08-22T13:36:48.27 0.1 undecidable manual S 238 0.2896 50 0 97
IV.ATVO.HHZ. 2021-08-22T13:36:48.04 1.0 undecidable manual P 320 0.5576 50 -0.06 23
IV.CSP1.EHE. 2021-08-22T13:36:47.02 0.1 undecidable manual S 59 0.2563 50 -0.27 92
IV.GAVE.HNZ. 2021-08-22T13:36:47.54 0.1 undecidable manual S 182 0.2662 50 -0.03 97
IV.ARVD.HHZ. 2021-08-22T13:36:47.68 0.1 positive manual P 3 0.5405 50 -0.11 90
IV.MC2.EHZ. 2021-08-22T13:36:46.02 0.1 undecidable manual S 103 0.2131 113 0.1 97
IV.SSFR.HHZ. 2021-08-22T13:36:46.81 0.3 negative manual P 349 0.4856 50 -0.06 69
IV.CING.HHZ. 2021-08-22T13:36:46.58 0.1 positive manual P 27 0.4676 50 0.02 93
IV.EL6.EHZ. 2021-08-22T13:36:45.33 0.3 positive manual P 21 0.3975 50 -0.03 71
IV.MURB.HHZ. 2021-08-22T13:36:45.72 0.6 negative manual P 318 0.4119 50 0.12 46
IV.ASSB.HHZ. 2021-08-22T13:36:45.00 0.1 undecidable manual S 295 0.1988 114 -0.41 91
IV.NRCA.HNE. 2021-08-22T13:36:45.20 0.1 undecidable manual S 129 0.1979 115 -0.17 96
IV.GAVE.HNZ. 2021-08-22T13:36:43.05 0.1 undecidable manual P 182 0.2662 50 -0.05 97
IV.FDMO.HHZ. 2021-08-22T13:36:43.71 0.1 undecidable manual S 60 0.1547 120 -0.19 96
IV.ATCC.EHZ. 2021-08-22T13:36:43.61 0.1 negative manual P 320 0.2977 50 -0.04 96
IV.PF6.EHE. 2021-08-22T13:36:43.03 0.1 undecidable manual P 50 0.277 50 -0.27 92
IV.MOMA.HHZ. 2021-08-22T13:36:43.63 0.6 negative manual P 238 0.2896 50 0.12 47
IV.CSP1.EHE. 2021-08-22T13:36:42.84 0.1 undecidable manual P 59 0.2563 50 -0.1 96
IV.MC2.EHZ. 2021-08-22T13:36:42.21 0.1 undecidable manual P 103 0.2131 113 0.06 97
IV.FEMA.HNZ. 2021-08-22T13:36:42.62 0.1 undecidable manual S 88 0.1061 130 0.25 96
IV.ASSB.HHZ. 2021-08-22T13:36:41.72 0.1 negative manual P 295 0.1988 114 -0.14 96
IV.NRCA.HNE. 2021-08-22T13:36:41.82 0.1 undecidable manual P 129 0.1979 115 -0.01 99
IV.MML1.EHZ. 2021-08-22T13:36:41.19 1.0 undecidable manual P 17 0.1628 119 0.05 25
IV.SEF1.HNE. 2021-08-22T13:36:41.47 0.6 undecidable manual P 9 0.1907 115 -0.23 47
IV.FDMO.HHZ. 2021-08-22T13:36:41.06 0.1 positive manual P 60 0.1547 120 0.08 98
IT.MTCL.HGZ. 2021-08-22T13:36:41.51 0.1 undecidable manual S 63 0.0782 139 -0.08 100
IT.FOPC.HGZ. 2021-08-22T13:36:41.10 0.1 positive manual P 275 0.1484 121 0.25 95
IV.FEMA.HNZ. 2021-08-22T13:36:40.48 0.6 negative manual P 88 0.1061 130 0.38 47
IV.CESI.HHZ. 2021-08-22T13:36:40.83 0.1 undecidable manual S 360 0.0468 153 -0.09 100
IT.MTCL.HGZ. 2021-08-22T13:36:39.85 0.1 negative manual P 63 0.0782 139 0.2 97
IV.CESI.HHZ. 2021-08-22T13:36:39.48 0.1 undecidable manual P 360 0.0468 153 0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:2.4 0.00381 1.9 AML other m 2021-08-22T13:36:41.95
IV.CESI.HNN. ML:2.3 0.003395 1.92 AML other m 2021-08-22T13:36:41.96
IV.CESI.HNE. ML:2.2 0.0027 1.64 AML other m 2021-08-22T13:36:41.93
IV.CESI.HHE. ML:2.3 0.00322 1.64 AML other m 2021-08-22T13:36:41.93
IV.FEMA.HNE. ML:2 0.00114 0.12 AML other m 2021-08-22T13:36:42.66
IV.FEMA.HNN. ML:2 0.001145 1.08 AML other m 2021-08-22T13:36:43.66
IV.MML1.HNE. ML:1.7 0.000431 0.18 AML other m 2021-08-22T13:36:44.30
IV.MML1.EHE. ML:1.7 0.0004485 0.2 AML other m 2021-08-22T13:36:44.30
IV.FDMO.HHE. ML:1.8 0.0005075 0.1 AML other m 2021-08-22T13:36:44.41
IV.MML1.EHN. ML:1.6 0.0003155 0.28 AML other m 2021-08-22T13:36:44.67
IV.MML1.HNN. ML:1.6 0.000329 0.28 AML other m 2021-08-22T13:36:44.67
IV.FDMO.HHN. ML:1.7 0.0004355 0.42 AML other m 2021-08-22T13:36:44.59
IV.ASSB.HHN. ML:1.7 0.00035 0.3 AML other m 2021-08-22T13:36:45.31
IV.ASSB.HHE. ML:1.7 0.000305 0.28 AML other m 2021-08-22T13:36:45.24
IV.MOMA.HHN. ML:1.6 0.0001845 0.18 AML other m 2021-08-22T13:36:48.67
IV.ATCC.EHE. ML:1.7 0.0002105 0.14 AML other m 2021-08-22T13:36:48.93
IV.ATCC.EHN. ML:1.9 0.000329 1.68 AML other m 2021-08-22T13:36:48.96
IV.MOMA.HHE. ML:1.7 0.000216 0.18 AML other m 2021-08-22T13:36:49.32
IV.MURB.HHE. ML:1.9 0.0002215 0.64 AML other m 2021-08-22T13:36:53.49
IV.MURB.HHN. ML:1.9 0.0002575 0.16 AML other m 2021-08-22T13:36:54.26
IV.SSFR.HHN. ML:1.8 0.000143 0.18 AML other m 2021-08-22T13:36:54.83
IV.SSFR.HHE. ML:1.8 0.000141 0.24 AML other m 2021-08-22T13:36:54.80
IV.CING.HHN. ML:1.5 7.62E-5 0.72 AML other m 2021-08-22T13:36:55.43
IV.CING.HHE. ML:1.4 6.33E-5 0.22 AML other m 2021-08-22T13:36:55.37
IV.ATVO.HHE. ML:1.2 3.045E-5 0.68 AML other m 2021-08-22T13:36:56.61
IV.ARVD.HHN. ML:1.2 3.26E-5 1.54 AML other m 2021-08-22T13:36:57.08
IV.ARVD.HHE. ML:1.3 4.435E-5 0.34 AML other m 2021-08-22T13:36:57.66
IV.ATVO.HHN. ML:1.2 2.96E-5 0.62 AML other m 2021-08-22T13:37:00.46
IV.PIEI.HHN. ML:1.3 3.56E-5 0.36 AML other m 2021-08-22T13:37:01.27
IV.PIEI.HHE. ML:1.4 4.015E-5 1.74 AML other m 2021-08-22T13:37:01.10
IV.NARO.HHE. ML:1.1 1.97E-5 1.18 AML other m 2021-08-22T13:37:02.84
IV.MPAG.EHE. ML:1.1 2.0E-5 0.78 AML other m 2021-08-22T13:37:03.40
IV.MPAG.EHN. ML:1.1 1.9E-5 0.44 AML other m 2021-08-22T13:37:03.22
IV.NARO.HHN. ML:1.1 1.885E-5 0.54 AML other m 2021-08-22T13:37:03.32
IV.LRP.EHE. ML:1.9 3.625E-5 1.34 AML other m 2021-08-22T13:37:07.07
IV.LRP.EHN. ML:1.5 1.3185E-5 0.16 AML other m 2021-08-22T13:37:10.14
IV.CELB.HHE. ML:2.8 0.0001525 0.82 AML other m 2021-08-22T13:37:40.38
IV.CELB.HHN. ML:3 0.0002515 0.08 AML other m 2021-08-22T13:37:48.35
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