Earthquake with magnitude of ML 0.7 on date 18-08-2021 and time 04:34:03 (UTC) in region 4 km SW Fossato di Vico (PG)

A magnitude ML 0.7 earthquake occured in region: 4 km SW Fossato di Vico (PG), on

  • 18-08-2021 04:34:03 (UTC)
  • 18-08-2021 06:34:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.27, 12.73 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
Fossato di Vico PG 4 2840 2840
Gualdo Tadino PG 6 15208 18048
Sigillo PG 7 2404 20452
Costacciaro PG 10 1216 21668
Gubbio PG 15 32216 53884
Scheggia e Pascelupo PG 16 1393 55277
Valfabbrica PG 16 3389 58666
Fabriano AN 16 31480 90146
Esanatoglia MC 18 2034 92180
Nocera Umbra PG 18 5839 98019
Fiuminata MC 19 1402 99421

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Perugia (166134 inhabitants)
35 Km N of Foligno (57155 inhabitants)
68 Km SW of Fano (60888 inhabitants)
72 Km E of Arezzo (99543 inhabitants)
73 Km S of Pesaro (94582 inhabitants)
75 Km SW of Ancona (100861 inhabitants)
79 Km N of Terni (111501 inhabitants)
89 Km S of Rimini (147750 inhabitants)
Recent and historical seismicity
Seismic hazard
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 ( 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
ML 0.7 2021-08-18
43.2698 12.7297 11 2021-08-18
Sala Sismica INGV-Roma 94319251
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2021-08-18 04:34:03 ± 0.14
Latitude 43.2698 ± 0.0072
Longitude 12.7297 ± 0.0148
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94319251


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1379
Semi-minor axis of confidence ellipse (meter) 301
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 123
Circular confidence region, given by single value of horizontal uncertainty (meter) 1380
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35793
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude information


Field Value
Value 0.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 94319251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-18 04:39:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NARO.HHZ. 2021-08-18T04:34:16.51 0.3 undecidable manual S 342 0.3579 50 0.12 70
IV.PIEI.HHZ. 2021-08-18T04:34:14.72 0.3 undecidable manual S 332 0.3013 50 0.01 72
IV.NARO.HHZ. 2021-08-18T04:34:10.72 0.1 undecidable manual P 342 0.3579 50 -0.11 94
IV.PIEI.HHZ. 2021-08-18T04:34:09.81 0.1 undecidable manual P 332 0.3013 50 -0.05 96
IV.COR1.EHZ. 2021-08-18T04:34:09.08 3.0 undecidable manual P 0
IV.ATCC.EHZ. 2021-08-18T04:34:08.73 0.1 undecidable manual S 218 0.107 132 -0.02 100
IV.FOSV.EHZ. 2021-08-18T04:34:07.06 0.3 undecidable manual S 42 0.0342 160 -0.08 75
IV.ATCC.EHZ. 2021-08-18T04:34:06.46 0.1 undecidable manual P 218 0.107 132 0.04 100
IV.FOSV.EHZ. 2021-08-18T04:34:05.58 0.1 undecidable manual P 42 0.0342 160 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHN. ML:0.4 3.7839195E-5 0.08 AML other m 2021-08-18T04:34:07.43
IV.FOSV.EHE. ML:0.2 2.5939735E-5 0.08 AML other m 2021-08-18T04:34:07.37
IV.ATCC.EHE. ML:0.9 8.0027625E-5 0.0992 AML other m 2021-08-18T04:34:08.84
IV.ATCC.EHN. ML:0.9 9.145E-5 1.48 AML other m 2021-08-18T04:34:08.15
IV.COR1.HNE. ML:2.6 0.0012133967 1.4304 AML other m 2021-08-18T04:34:30.06
IV.COR1.HNN. ML:2.6 0.0010590575 1.2192 AML other m 2021-08-18T04:34:29.54
IV.COR1.EHE. ML:1.4 6.8594807E-5 0.56 AML other m 2021-08-18T04:34:09.19
IV.COR1.EHN. ML:1.5 9.445046E-5 0.5408 AML other m 2021-08-18T04:34:26.86
IV.PIEI.HHE. ML:0.6 1.3263385E-5 0.9408 AML other m 2021-08-18T04:34:25.66
IV.PIEI.HHN. ML:0.8 3.087902E-5 2.48 AML other m 2021-08-18T04:34:25.48
IV.NARO.HHE. ML:0.6 1.332614E-5 1.12 AML other m 2021-08-18T04:34:32.93
IV.NARO.HHN. ML:0.9 2.370445E-5 0.7776 AML other m 2021-08-18T04:34:19.78
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download