Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 02-10-2021 and time 18:01:56 (Italy) in region 7 km SE Valtopina (PG)

A magnitude ML 0.6 earthquake occured in region: 7 km SE Valtopina (PG), on

  • 02-10-2021 16:01:56 (UTC)
  • 02-10-2021 18:01:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0000, 12.7820 at 13 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Valtopina PG 7 1398 1398
Foligno PG 8 57155 58553
Spello PG 9 8645 67198
Nocera Umbra PG 13 5839 73037
Trevi PG 14 8469 81506
Montefalco PG 16 5679 87185
Assisi PG 16 28299 115484
Bevagna PG 16 5081 120565
Serravalle di Chienti MC 16 1070 121635
Cannara PG 16 4305 125940
Sellano PG 17 1079 127019
Monte Cavallo MC 18 145 127164
Campello sul Clitunno PG 20 2442 129606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
50 Km N of Terni (111501 inhabitants)
84 Km W of Teramo (54892 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
88 Km NW of L'Aquila (69753 inhabitants)
90 Km SE of Arezzo (99543 inhabitants)
91 Km SW of Ancona (100861 inhabitants)
96 Km S of Fano (60888 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
Bulletin
Rev1000 		ML 0.6 2021-10-02
16:01:56		 42.9997 12.7822 13 2022-03-30
13:04:35		 Bollettino Sismico Italiano INGV 100719031
Reviewed
Rev100 		ML 0.7 2021-10-02
16:01:55		 42.9988 12.7677 18 2021-10-02
16:09:54		 Sala Sismica INGV-Roma 96142371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-02 16:01:56 ± 0.11
Latitude 42.9997 ± 0.0063
Longitude 12.7822 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100719031

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 620
Semi-minor axis of confidence ellipse (meter) 328
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 196
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 208
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 0.22573
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 100719031
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-07 17:04:31

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 96142371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-02 16:09:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2021-10-02T16:02:05.52 0.6 undecidable manual S 81 25.0527 98 -0.03 49
IV.ATCC.EHZ. 2021-10-02T16:02:05.36 0.6 undecidable manual S 331 23.5542 99 0.2 47
IV.MML1.EHZ. 2021-10-02T16:02:03.99 0.3 undecidable manual S 51 19.869 102 -0.2 73
IV.CESI.HHZ. 2021-10-02T16:02:01.90 0.3 undecidable manual S 87 9.9789 130 0.11 74
IV.ASSB.HHZ. 2021-10-02T16:02:01.93 0.3 undecidable manual S 295 11.0778 126 -0.1 74
IV.FDMO.HHZ. 2021-10-02T16:02:01.69 0.3 undecidable manual P 81 25.0527 98 0.02 73
IV.ATCC.EHZ. 2021-10-02T16:02:01.47 0.3 undecidable manual P 331 23.5542 99 0.03 73
IV.MML1.EHZ. 2021-10-02T16:02:00.76 0.1 undecidable manual P 51 19.869 102 -0.12 98
IV.CESI.HHZ. 2021-10-02T16:01:59.57 0.1 undecidable manual P 87 9.9789 130 0.07 100
IV.ASSB.HHZ. 2021-10-02T16:01:59.59 0.1 undecidable manual P 295 11.0778 126 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHE. ML:0.5 0.000033 0.48 AML other m 2021-10-02T16:02:02.08
IV.ASSB.HHN. ML:0.4 0.00002685 0.18 AML other m 2021-10-02T16:02:02.08
IV.MML1.EHE. ML:0.5 0.000021249999999999998 0.12 AML other m 2021-10-02T16:02:04.09
IV.MML1.EHN. ML:0.6 0.000027400000000000002 0.72 AML other m 2021-10-02T16:02:04.29
IV.GAVE.EHN. ML:1.1 0.000051000000000000006 1.56 AML other m 2021-10-02T16:02:11.01
IV.GAVE.EHE. ML:0.8 0.00002675 0.38 AML other m 2021-10-02T16:02:11.21
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