Earthquake with magnitude of Md 3.1 on date 11-09-1997 and time 05:51:49 (Italy) in region 10 km SE Valtopina (PG)

A magnitude Md 3.1 earthquake occured in region: 10 km SE Valtopina (PG), on

  • 11-09-1997 03:51:49 (UTC)
  • 11-09-1997 05:51:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.01, 12.85 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
Valtopina PG 10 1398 1398
Serravalle di Chienti MC 11 1070 2468
Monte Cavallo MC 12 145 2613
Nocera Umbra PG 12 5839 8452
Foligno PG 13 57155 65607
Spello PG 15 8645 74252
Sellano PG 15 1079 75331
Trevi PG 17 8469 83800
Pieve Torina MC 17 1458 85258
Sefro MC 17 422 85680
Muccia MC 18 915 86595
Fiordimonte MC 20 202 86797

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km E of Foligno (57155 inhabitants)
39 Km E of Perugia (166134 inhabitants)
52 Km NE of Terni (111501 inhabitants)
80 Km W of Teramo (54892 inhabitants)
86 Km NW of L'Aquila (69753 inhabitants)
87 Km SW of Ancona (100861 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
94 Km SE of Arezzo (99543 inhabitants)
94 Km S of Fano (60888 inhabitants)
100 Km S of Pesaro (94582 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
Rev 1000 Md 3.1
ML-VAX 2.8
1997-09-11
03:51:49
43.01 12.85 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 277509
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-11 03:51:49 ± 0.469
Latitude 43.01 ± 0.02
Longitude 12.85 ± 0.04
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 277509

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) 3550.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 131
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.01902
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 277509
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:22:10

ML:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 277509
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
--.RDP.Z. 1997-09-11T03:52:29.73 10.0 undecidable manual SN 184 0.0113 -0.98 0.4
--.SFI.Z. 1997-09-11T03:52:27.32 10.0 undecidable manual SN 321 0.0104 -1.01 0.4
--.GU9.Z. 1997-09-11T03:52:25.71 10.0 undecidable manual PN 309 0.019 0.6 1
--.PQ9.Z. 1997-09-11T03:52:24.50 10.0 undecidable manual SN 157 0.0096 -1.76 0.1
--.BDI.Z. 1997-09-11T03:52:23.36 10.0 undecidable manual PN 303 0.0175 0.61 1.1
--.PII.Z. 1997-09-11T03:52:21.44 10.0 undecidable manual PN 293 0.0164 0.18 1.4
--.CPI2.Z. 1997-09-11T03:52:21.10 10.0 undecidable manual PN 142 0.016 0.37 1.3
--.CRVI.Z. 1997-09-11T03:52:20.20 10.0 undecidable manual PN 139 0.0151 1.13 0.7
--.PLI2.Z. 1997-09-11T03:52:20.16 10.0 undecidable manual PN 148 0.0155 0.39 1.4
--.SDI.Z. 1997-09-11T03:52:17.77 10.0 undecidable manual PN 150 0.0133 1.38 0.5
--.AQU.Z. 1997-09-11T03:52:15.69 10.0 undecidable manual SG 147 0.0069 -1.07 0.4
--.RDP.Z. 1997-09-11T03:52:13.73 10.0 undecidable manual PN 184 0.0113 0.44 1.6
--.SFI.Z. 1997-09-11T03:52:12.51 10.0 undecidable manual PN 321 0.0104 0.6 1.5
--.MNS.Z. 1997-09-11T03:52:12.11 10.0 undecidable manual SG 191 0.0057 -0.37 0.7
--.CSNT.Z. 1997-09-11T03:52:12.74 10.0 undecidable manual PN 292 0.011 -0.17 1.8
--.RMP.Z. 1997-09-11T03:52:11.97 10.0 undecidable manual PN 185 0.0108 -0.61 1.4
--.PQ9.Z. 1997-09-11T03:52:11.99 10.0 undecidable manual PN 157 0.0096 1.28 0.7
--.ARV.Z. 1997-09-11T03:52:07.52 10.0 undecidable manual SG 7 0.0044 -0.41 0.7
--.AQU.Z. 1997-09-11T03:52:03.96 10.0 undecidable manual PG 147 0.0069 -1.27 0.7
--.MNS.Z. 1997-09-11T03:52:01.75 10.0 undecidable manual PG 191 0.0057 -1.01 1
--.ARV.Z. 1997-09-11T03:51:58.45 10.0 undecidable manual PG 7 0.0044 -1.68 0.3
--.ASS.Z. 1997-09-11T03:51:55.20 10.0 undecidable manual SG 290 0.0014 -0.83 0.5
--.ASS.Z. 1997-09-11T03:51:53.31 10.0 positive manual PG 290 0.0014 0.16 3.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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