Earthquake with magnitude of Md 2.5 on date 28-09-1997 and time 18:55:42 (Italy) in region 4 km W Preci (PG)

A magnitude Md 2.5 earthquake occured in region: 4 km W Preci (PG), on

  • 28-09-1997 16:55:42 (UTC)
  • 28-09-1997 18:55:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8940, 12.9940 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
Preci PG 4 724 724
Sellano PG 5 1079 1803
Visso MC 9 1107 2910
Cerreto di Spoleto PG 10 1075 3985
Monte Cavallo MC 11 145 4130
Castelsantangelo sul Nera MC 13 281 4411
Ussita MC 13 444 4855
Norcia PG 14 4957 9812
Vallo di Nera PG 17 364 10176
Pieve Torina MC 18 1458 11634
Fiordimonte MC 18 202 11836
Campello sul Clitunno PG 19 2442 14278
Cascia PG 20 3217 17495

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
55 Km E of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
91 Km SW 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 2.5
ML-VAX 2.0
1997-09-28
16:55:42
42.894 12.994 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 283479
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-09-28 16:55:42 ± 0.413
Latitude 42.8940 ± 0.0134
Longitude 12.9940 ± 0.0443
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 283479

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) 3904.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 207
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00267
Epicentral distance of station farthest from the epicenter (degree) 0.00939
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 283479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:27:23

ML:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 283479
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
--.CRE.Z. 1997-09-28T16:56:19.87 10.0 undecidable manual SG 313 1.0434 0.63 0.5
--.FB9.Z. 1997-09-28T16:56:12.18 10.0 undecidable manual SG 348 0.8103 0.55 0.6
--.CRE.Z. 1997-09-28T16:56:05.64 10.0 undecidable manual PG 313 1.0434 1.86 0.2
--.ARV.Z. 1997-09-28T16:56:04.56 10.0 undecidable manual SG 356 0.5994 -0.41 0.7
--.MNS.Z. 1997-09-28T16:56:03.70 10.0 undecidable manual SG 204 0.555 -0.42 0.7
--.FB9.Z. 1997-09-28T16:55:59.13 10.0 undecidable manual PG 348 0.8103 -0.26 1.7
--.ARV.Z. 1997-09-28T16:55:55.90 10.0 undecidable manual PG 356 0.5994 -0.45 1.7
--.MNS.Z. 1997-09-28T16:55:54.77 10.0 undecidable manual PG 204 0.555 0.08 2
--.ASS.Z. 1997-09-28T16:55:53.30 10.0 undecidable manual SG 303 0.2997 -1.1 0.3
--.ASS.Z. 1997-09-28T16:55:49.00 10.0 undecidable manual PG 303 0.2997 -0.44 1.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download