Earthquake with magnitude of ML 0.5 on date 11-10-2020 and time 05:17:27 (Italy) in region 3 km NE Pietralunga (PG)

A magnitude ML 0.5 earthquake occured in region: 3 km NE Pietralunga (PG), on

  • 11-10-2020 03:17:27 (UTC)
  • 11-10-2020 05:17:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.466, 12.467 at 6 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
Pietralunga PG 3 2111 2111
Apecchio PU 11 1882 3993
Cantiano PU 13 2245 6238
Piobbico PU 14 2029 8267
Gubbio PG 15 32216 40483
Montone PG 16 1680 42163
Cagli PU 17 8731 50894
Scheggia e Pascelupo PG 18 1393 52287
CittĂ  di Castello PG 18 39913 92200

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km N of Perugia (166134 inhabitants)
47 Km E of Arezzo (99543 inhabitants)
60 Km NW of Foligno (57155 inhabitants)
61 Km SW of Pesaro (94582 inhabitants)
61 Km SW of Fano (60888 inhabitants)
67 Km S of Rimini (147750 inhabitants)
77 Km S of Cesena (96758 inhabitants)
87 Km W of Ancona (100861 inhabitants)
91 Km SE of Forlì (117913 inhabitants)
93 Km E of Siena (53903 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 0.5 2020-10-11
43.4657 12.4667 6 2020-10-11
Sala Sismica INGV-Roma 83694731
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2020-10-11 03:17:27 ± 0.14
Latitude 43.4657 ± 0.0036
Longitude 12.4667 ± 0.0112
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83694731


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 765
Semi-minor axis of confidence ellipse (meter) 620
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 268
Circular confidence region, given by single value of horizontal uncertainty (meter) 760
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.16727
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information


Field Value
Value 0.5
Uncertainty 0
Num. used stations 2
Type of magnitude ML
Reference to an origin 83694731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-11 03:39:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRE.HHZ. 2020-10-11T03:17:33.06 3.0 undecidable manual Pn -0.13 0
IV.ATVO.HHZ. 2020-10-11T03:17:32.06 0.1 undecidable manual S 208 0.0944 118 -0.02 99
IV.NARO.HHZ. 2020-10-11T03:17:31.70 0.3 negative manual P 30 0.1673 107 -0.14 71
IV.BADI.EHZ. 2020-10-11T03:17:31.67 0.6 positive manual P 285 0.1673 107 -0.17 47
IV.ATVO.HHZ. 2020-10-11T03:17:30.41 0.1 undecidable manual P 208 0.0944 118 0.07 98
IV.APEC.HHZ. 2020-10-11T03:17:30.58 0.1 undecidable manual P 340 0.0989 117 0.16 96
IV.ATPI.EHZ. 2020-10-11T03:17:30.64 0.1 undecidable manual S 252 0.0495 136 -0.03 99
IV.ATPI.EHZ. 2020-10-11T03:17:29.53 0.1 undecidable manual P 252 0.0495 136 0 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATPI.EHE. ML:0.8 0.0001029 0.32 AML other m 2020-10-11T03:17:30.98
IV.ATPI.EHN. ML:0.6 6.74E-5 0.3 AML other m 2020-10-11T03:17:30.99
IV.ATVO.HHE. ML:0.5 4.255E-5 0.5 AML other m 2020-10-11T03:17:32.53
IV.ATVO.HHN. ML:0.5 5.175E-5 0.1 AML other m 2020-10-11T03:17:32.40
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