Earthquake with magnitude of Md 2.2 on date 28-09-1997 and time 04:39:39 (Italy) in region 8 km E Valtopina (PG)

A magnitude Md 2.2 earthquake occured in region: 8 km E Valtopina (PG), on

  • 28-09-1997 02:39:39 (UTC)
  • 28-09-1997 04:39:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.05, 12.85 at 5 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 8 1398 1398
Nocera Umbra PG 8 5839 7237
Serravalle di Chienti MC 9 1070 8307
Sefro MC 13 422 8729
Monte Cavallo MC 14 145 8874
Spello PG 16 8645 17519
Foligno PG 16 57155 74674
Muccia MC 16 915 75589
Pieve Torina MC 17 1458 77047
Fiuminata MC 17 1402 78449
Pioraco MC 18 1134 79583
Assisi PG 19 28299 107882
Pievebovigliana MC 19 866 108748
Sellano PG 19 1079 109827
Fiordimonte MC 20 202 110029

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Foligno (57155 inhabitants)
38 Km E of Perugia (166134 inhabitants)
57 Km N of Terni (111501 inhabitants)
82 Km NW of Teramo (54892 inhabitants)
83 Km SW of Ancona (100861 inhabitants)
89 Km S of Fano (60888 inhabitants)
90 Km NW of L'Aquila (69753 inhabitants)
91 Km SE of Arezzo (99543 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
95 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 2.2 1997-09-28
02:39:39
43.05 12.85 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 282609
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-28 02:39:39 ± 0.455
Latitude 43.05 ± 0.02
Longitude 12.85 ± 0.04
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 282609

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) 3967.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.01368
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 282609
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:26:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1997-09-28T02:40:08.42 10.0 undecidable manual PN 151 0.0137 1.7 0.3
--.MNS.Z. 1997-09-28T02:40:03.35 10.0 undecidable manual SG 190 0.0061 -0.38 0.7
--.CRE.Z. 1997-09-28T02:39:57.99 10.0 undecidable manual PG 311 0.0077 1.32 0.7
--.FB9.Z. 1997-09-28T02:39:52.50 10.0 undecidable manual PG 355 0.0057 -0.47 1.7
--.MNS.Z. 1997-09-28T02:39:51.95 10.0 undecidable manual PG 190 0.0061 -1.33 0.8
--.ARV.Z. 1997-09-28T02:39:48.16 10.0 undecidable manual PG 8 0.004 -0.84 1.3
--.ASS.Z. 1997-09-28T02:39:44.61 10.0 undecidable manual SG 273 0.0012 -0.2 0.7
--.ASS.Z. 1997-09-28T02:39:42.37 10.0 undecidable manual PG 273 0.0012 0.01 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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