Earthquake with magnitude of Md 1.9 on date 26-09-1997 and time 13:13:38 (Italy) in region 6 km E Valtopina (PG)

A magnitude Md 1.9 earthquake occured in region: 6 km E Valtopina (PG), on

  • 26-09-1997 11:13:38 (UTC)
  • 26-09-1997 13:13:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0440, 12.8230 at 9 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 6 1398 1398
Nocera Umbra PG 8 5839 7237
Serravalle di Chienti MC 11 1070 8307
Spello PG 14 8645 16952
Foligno PG 14 57155 74107
Sefro MC 15 422 74529
Monte Cavallo MC 16 145 74674
Assisi PG 17 28299 102973
Muccia MC 19 915 103888
Fiuminata MC 19 1402 105290
Pieve Torina MC 19 1458 106748
Sellano PG 19 1079 107827
Trevi PG 19 8469 116296

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NE of Foligno (57155 inhabitants)
36 Km E of Perugia (166134 inhabitants)
56 Km N of Terni (111501 inhabitants)
84 Km NW of Teramo (54892 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
90 Km SE of Arezzo (99543 inhabitants)
90 Km NW of L'Aquila (69753 inhabitants)
90 Km S of Fano (60888 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
97 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
Bulletin
Rev1000
Md 1.9
ML-VAX 2.8
1997-09-26
11:13:38
43.044 12.823 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 279459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-26 11:13:38 ± 0.394
Latitude 43.0440 ± 0.0078
Longitude 12.8230 ± 0.0510
Depth (km) 9 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 279459

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) 4232.0
Confidence level of the uncertainty (%) 68

Quality

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 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.00599
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 279459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:23:53

ML:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 279459
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(km) Takeoff_angle Residual Weight
--.FB9.Z. 1997-09-26T11:14:02.10 10.0 undecidable manual SG 356 0.6438 0.35 0.2
--.ARV.Z. 1997-09-26T11:13:55.92 10.0 undecidable manual SG 10 0.4551 0.21 0.5
--.MNS.Z. 1997-09-26T11:13:52.31 10.0 undecidable manual PG 188 0.666 0.02 1.4
--.FB9.Z. 1997-09-26T11:13:51.64 10.0 undecidable manual PG 356 0.6438 -0.32 0.6
--.ARV.Z. 1997-09-26T11:13:48.50 10.0 positive manual PG 10 0.4551 -0.03 3.5
--.ASS.Z. 1997-09-26T11:13:44.60 10.0 undecidable manual SG 278 0.1221 -0.42 0.1
--.ASS.Z. 1997-09-26T11:13:42.36 10.0 undecidable manual PG 278 0.1221 0.31 0.7
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