Earthquake with magnitude of ML 0.5 on date 16-08-2011 and time 19:26:52 (Italy) in region 7 km SE Pietralunga (PG)

A magnitude ML 0.5 earthquake occured in region: 7 km SE Pietralunga (PG), on

  • 16-08-2011 17:26:52 (UTC)
  • 16-08-2011 19:26:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4080, 12.5170 at 6 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.

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 8 2111 2111
Gubbio PG 8 32216 34327
Cantiano PU 12 2245 36572
Scheggia e Pascelupo PG 12 1393 37965
Montone PG 16 1680 39645
Costacciaro PG 17 1216 40861
Apecchio PU 19 1882 42743
Cagli PU 19 8731 51474
Umbertide PG 19 16681 68155

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NE of Perugia (166134 inhabitants)
52 Km E of Arezzo (99543 inhabitants)
52 Km NW of Foligno (57155 inhabitants)
63 Km SW of Fano (60888 inhabitants)
64 Km SW of Pesaro (94582 inhabitants)
73 Km S of Rimini (147750 inhabitants)
84 Km S of Cesena (96758 inhabitants)
84 Km W of Ancona (100861 inhabitants)
95 Km N of Terni (111501 inhabitants)
96 Km E of Siena (53903 inhabitants)
98 Km SE of Forlì (117913 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
Md 1.3
ML 0.5
2011-08-16
17:26:52
43.408 12.517 7 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1273009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-08-16 17:26:52 ± 0.12
Latitude 43.4080 ± 0.0063
Longitude 12.5170 ± 0.0149
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1273009

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1344
Semi-minor axis of confidence ellipse (meter) 390
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 297
Circular confidence region, given by single value of horizontal uncertainty (meter) 1389.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 246
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.12770
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 3
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.0
Num. used stations
Type of magnitude ML
Reference to an origin 1273009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:08:30

Md:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1273009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-06 01:08:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2011-08-16T17:26:58.02 0.1 undecidable manual Sg 6 14.1747 0.008 100
IV.ATPC.HHN. 2011-08-16T17:26:56.59 0.1 undecidable manual Sg 329 9.3795 0.036 100
IV.ATVO.HHE. 2011-08-16T17:26:56.51 0.1 undecidable manual Sg 252 9.3795 -0.039 100
IV.PIEI.HHZ. 2011-08-16T17:26:55.71 0.1 undecidable manual Pg 6 14.1747 -0.009 100
IV.ATVO.HHE. 2011-08-16T17:26:54.95 0.1 undecidable manual Pg 252 9.3795 0.072 99
IV.ATPC.HHN. 2011-08-16T17:26:54.82 0.1 undecidable manual Pg 329 9.3795 -0.058 100
IV.SFI.EHN. 2011-08-16T17:26:48.81 10.0 undecidable manual Pg 0 0 0
IV.MCIV.HHN. 2011-08-16T17:26:44.70 10.0 undecidable manual Pg 0 0 0
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