Earthquake with magnitude of Md 3.4 on date 26-04-1999 and time 12:26:17 (Italy) in region 8 km S Pietralunga (PG)

A magnitude Md 3.4 earthquake occured in region: 8 km S Pietralunga (PG), on

  • 26-04-1999 10:26:17 (UTC)
  • 26-04-1999 12:26:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.37, 12.44 at 2 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
Montone PG 9 1680 3791
Umbertide PG 11 16681 20472
Gubbio PG 12 32216 52688
Città di Castello PG 19 39913 92601
Scheggia e Pascelupo PG 19 1393 93994
Cantiano PU 20 2245 96239

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Perugia (166134 inhabitants)
46 Km E of Arezzo (99543 inhabitants)
51 Km NW of Foligno (57155 inhabitants)
71 Km SW of Fano (60888 inhabitants)
72 Km SW of Pesaro (94582 inhabitants)
78 Km S of Rimini (147750 inhabitants)
87 Km S of Cesena (96758 inhabitants)
90 Km E of Siena (53903 inhabitants)
91 Km N of Terni (111501 inhabitants)
92 Km W of Ancona (100861 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 3.4
ML-VAX 2.1
1999-04-26
10:26:17
43.37 12.44 2 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 364009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-04-26 10:26:17 ± 0.189
Latitude 43.37 ± 0.01
Longitude 12.44 ± 0.01
Depth (km) 2 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 364009

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 1371.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.02299
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

Md:3.4

Field Value
Value 3.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 364009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:41:26

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 364009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ZC9.Z. 1999-04-26T10:27:03.10 10.0 undecidable manual SN 313 0.013 -1.17 0
--.BOB.Z. 1999-04-26T10:26:59.93 10.0 undecidable manual PN 304 0.023 0.16 1
--.MNS.Z. 1999-04-26T10:26:53.47 10.0 undecidable manual SG 169 0.009 0.69 0.3
--.SDI.Z. 1999-04-26T10:26:51.41 10.0 undecidable manual PN 148 0.0174 0.16 1.2
--.EB9.Z. 1999-04-26T10:26:49.90 10.0 undecidable manual PN 306 0.0161 -0.18 1.3
--.CSNT.Z. 1999-04-26T10:26:48.22 10.0 undecidable manual SG 277 0.0075 0.57 0.4
--.PQ9.Z. 1999-04-26T10:26:45.86 10.0 undecidable manual PN 152 0.0136 0.39 1.1
--.PII.Z. 1999-04-26T10:26:45.24 10.0 undecidable manual PN 285 0.0129 1 0.2
--.SFI.Z. 1999-04-26T10:26:44.90 10.0 undecidable manual SG 321 0.0062 1.37 0
--.NRCA.Z. 1999-04-26T10:26:43.20 10.0 undecidable manual SG 137 0.0065 -0.87 0.2
--.ZC9.Z. 1999-04-26T10:26:43.90 10.0 undecidable manual PN 313 0.013 -0.47 1
--.AQU.Z. 1999-04-26T10:26:41.26 10.0 undecidable manual PN 144 0.0111 -0.3 1.4
--.GRFL.Z. 1999-04-26T10:26:38.89 10.0 undecidable manual PG 258 0.0097 -0.52 1
--.MNS.Z. 1999-04-26T10:26:37.73 10.0 undecidable manual PG 169 0.009 -0.05 1.9
--.CSNT.Z. 1999-04-26T10:26:34.50 10.0 undecidable manual PG 277 0.0075 -0.32 1.6
--.CRE.Z. 1999-04-26T10:26:34.68 10.0 undecidable manual SG 305 0.0039 0.68 0.3
--.FB9.Z. 1999-04-26T10:26:33.80 10.0 undecidable manual SG 37 0.0036 0.07 0.8
--.SNTG.Z. 1999-04-26T10:26:32.48 10.0 undecidable manual SG 107 0.0034 0.41 0.5
--.NRCA.Z. 1999-04-26T10:26:32.45 10.0 undecidable manual PG 137 0.0065 -0.3 1.6
--.ASS.Z. 1999-04-26T10:26:31.00 10.0 undecidable manual SG 152 0.0031 0.47 0.5
--.SFI.Z. 1999-04-26T10:26:31.60 10.0 undecidable manual PG 321 0.0062 -0.38 1.5
--.RSM.Z. 1999-04-26T10:26:30.13 10.0 undecidable manual PG 1 0.005 0.45 1.3
--.FB9.Z. 1999-04-26T10:26:26.17 10.0 undecidable manual PG 37 0.0036 -0.2 1.8
--.CRE.Z. 1999-04-26T10:26:26.50 10.0 undecidable manual PG 305 0.0039 -0.44 1.3
--.SNTG.Z. 1999-04-26T10:26:25.86 10.0 undecidable manual PG 107 0.0034 0.04 2
--.ASS.Z. 1999-04-26T10:26:24.94 10.0 undecidable manual PG 152 0.0031 0.01 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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