Earthquake with magnitude of ML 1.1 on date 31-08-2021 and time 04:41:59 (UTC) in region 8 km NW Sellano (PG)

A magnitude ML 1.1 earthquake occured in region: 8 km NW Sellano (PG), on

  • 31-08-2021 04:41:59 (UTC)
  • 31-08-2021 06:41:59 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9590, 12.8920 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 10 145 1224
Serravalle di Chienti MC 14 1070 2294
Trevi PG 15 8469 10763
Preci PG 15 724 11487
Foligno PG 15 57155 68642
Cerreto di Spoleto PG 16 1075 69717
Valtopina PG 16 1398 71115
Pieve Torina MC 16 1458 72573
Visso MC 16 1107 73680
Campello sul Clitunno PG 18 2442 76122
Spello PG 18 8645 84767
Fiordimonte MC 18 202 84969
Muccia MC 19 915 85884
Nocera Umbra PG 19 5839 91723
Pievebovigliana MC 20 866 92589

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Foligno (57155 inhabitants)
44 Km E of Perugia (166134 inhabitants)
49 Km NE of Terni (111501 inhabitants)
74 Km W of Teramo (54892 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
88 Km NE of Viterbo (67173 inhabitants)
89 Km SW of Ancona (100861 inhabitants)
99 Km S of Fano (60888 inhabitants)
99 Km SE of Arezzo (99543 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-08-31
04:41:59
42.9592 12.8917 10 2021-08-31
04:50:01
Sala Sismica INGV-Roma 94849081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-31 04:41:59 ± 0.06
Latitude 42.9592 ± 0.0027
Longitude 12.8917 ± 0.0037
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 94849081

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 327
Semi-minor axis of confidence ellipse (meter) 227
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 330.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 18
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.40020
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 94849081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-31 04:50:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.IMI.HHZ. 2021-08-31T04:43:41.01 3.0 undecidable manual Sn -2.65 0
IV.AGLI.HHZ. 2021-08-31T04:43:30.54 3.0 undecidable manual Sg 3.17 0
IV.ACATE.HNZ. 2021-08-31T04:43:29.38 3.0 positive manual Pg 7.4 0
IV.CRND.HNZ. 2021-08-31T04:43:28.36 3.0 undecidable manual Sn 1.18 0
IV.SENA.HHZ. 2021-08-31T04:43:23.40 3.0 undecidable manual Sn -9.51 0
IV.CAVE.HHZ. 2021-08-31T04:43:13.46 3.0 undecidable manual Sg 1.52 0
IV.RESU.HHZ. 2021-08-31T04:43:10.74 3.0 negative manual Pn -1.97 0
GU.GBOS.HHZ. 2021-08-31T04:43:10.62 3.0 undecidable manual Pg 12.61 0
IX.RSF3.HHZ.02 2021-08-31T04:43:07.81 3.0 undecidable manual Sg 0.78 0
IV.ECTS.HHZ. 2021-08-31T04:43:06.32 3.0 undecidable manual Pn -6.02 0
IV.PP3.EHZ. 2021-08-31T04:42:27.26 0.3 undecidable manual S 0.64 1.58
IV.EL6.EHZ. 2021-08-31T04:42:14.19 0.1 undecidable manual S 22 44.4222 50 0.26 91
IV.MOMA.HHZ. 2021-08-31T04:42:10.51 0.1 undecidable manual S 237 31.3464 50 0.09 96
IV.CSP1.EHZ. 2021-08-31T04:42:09.70 0.1 undecidable manual S 60 29.3484 50 -0.21 94
IV.RMP.HHZ. 2021-08-31T04:42:07.43 3.0 positive manual P -6.38 0
IV.NRCA.HHZ. 2021-08-31T04:42:07.77 0.1 undecidable manual S 128 22.8549 113 -0.07 98
IV.EL6.EHZ. 2021-08-31T04:42:07.55 0.6 negative manual P 22 44.4222 50 -0.18 46
IV.ASSB.HHZ. 2021-08-31T04:42:06.99 0.1 undecidable manual S 296 21.0678 114 -0.28 94
IV.FDMO.HHZ. 2021-08-31T04:42:06.21 0.1 undecidable manual S 62 18.0708 118 -0.12 98
IV.MML1.EHZ. 2021-08-31T04:42:06.58 0.1 undecidable manual S 21 18.2706 117 0.17 97
IV.CSP1.EHZ. 2021-08-31T04:42:05.19 0.6 positive manual P 60 29.3484 50 -0.22 47
IV.ATCC.EHZ. 2021-08-31T04:42:05.67 0.6 positive manual P 321 32.3454 50 -0.19 47
IV.MOMA.HHZ. 2021-08-31T04:42:05.97 0.1 undecidable manual P 237 31.3464 50 0.27 93
IV.NRCA.HHZ. 2021-08-31T04:42:04.25 0.1 undecidable manual P 128 22.8549 113 0.04 99
IV.FDMO.HHZ. 2021-08-31T04:42:03.38 0.6 undecidable manual P 62 18.0708 118 0.04 50
IV.MML1.EHZ. 2021-08-31T04:42:03.41 0.1 positive manual P 21 18.2706 117 0.02 100
IV.CESI.HHZ. 2021-08-31T04:42:03.19 0.1 undecidable manual S 12 5.1948 151 0.18 99
IV.ASSB.HHZ. 2021-08-31T04:42:03.74 0.1 negative manual P 296 21.0678 114 -0.14 97
IV.CESI.HHZ. 2021-08-31T04:42:01.70 1.0 undecidable manual P 12 5.1948 151 0.28 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.2 0.0002505 0.1 AML other m 2021-08-31T04:42:03.37
IV.CESI.HHE. ML:1.3 0.000317 0.4 AML other m 2021-08-31T04:42:03.29
IV.FDMO.HHE. ML:0.6 0.0000281 0.56 AML other m 2021-08-31T04:42:06.72
IV.FDMO.HHN. ML:0.5 0.000027400000000000002 0.6 AML other m 2021-08-31T04:42:06.44
IV.ASSB.HHN. ML:1.0 0.0000636 0.18 AML other m 2021-08-31T04:42:07.18
IV.ASSB.HHE. ML:0.9 0.0000624 0.68 AML other m 2021-08-31T04:42:07.12
IX.RSF3.HHE.02 ML:2.5 0.00004565 1.1 AML other m 2021-08-31T04:43:42.39
IX.RSF3.HHN.02 ML:2.8 0.0000859 0.06 AML other m 2021-08-31T04:43:43.30
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