Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 25-09-1990 and time 06:51:30 (Italy) in region 4 km E Sellano (PG)

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

  • 25-09-1990 04:51:30 (UTC)
  • 25-09-1990 06:51:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8980, 12.9750 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sellano PG 4 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 10 1075 2878
Visso MC 10 1107 3985
Monte Cavallo MC 11 145 4130
Ussita MC 14 444 4574
Castelsantangelo sul Nera MC 15 281 4855
Norcia PG 15 4957 9812
Vallo di Nera PG 17 364 10176
Pieve Torina MC 18 1458 11634
Fiordimonte MC 18 202 11836
Campello sul Clitunno PG 18 2442 14278
Trevi PG 19 8469 22747
Serravalle di Chienti MC 20 1070 23817

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
46 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
89 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 2.3 		1990-09-25
04:51:30		 42.898 12.975 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 127749
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-09-25 04:51:30 ± 0.253
Latitude 42.8980 ± 0.0136
Longitude 12.9750 ± 0.0187
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 127749

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) 2146.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.01166
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 127749
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:58:48

ML:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 127749
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
--.SFI.Z. 1990-09-25T04:52:12.67 10.0 undecidable manual SN 321 1.2987 -0.4 0.4
--.CP9.Z. 1990-09-25T04:52:08.52 10.0 undecidable manual SG 180 1.0323 2.01 0
--.AOI.Z. 1990-09-25T04:51:59.00 10.0 undecidable manual SG? 34 0.7881 0.22 0
--.SFI.Z. 1990-09-25T04:51:55.31 10.0 undecidable manual PN 321 1.2987 0.28 1
--.ARV.Z. 1990-09-25T04:51:53.30 10.0 undecidable manual SG 357 0.5883 0.46 0.5
--.CP9.Z. 1990-09-25T04:51:52.39 10.0 undecidable manual PG 180 1.0323 1.14 0.3
--.MNS.Z. 1990-09-25T04:51:50.12 10.0 undecidable manual SG 202 0.5439 -1 0.2
--.SSO.Z. 1990-09-25T04:51:49.70 10.0 undecidable manual SG? 39 0.4995 0.01 0
--.ALP.Z. 1990-09-25T04:51:47.10 10.0 undecidable manual SG 104 0.444 -0.61 0.7
--.AOI.Z. 1990-09-25T04:51:47.10 10.0 undecidable manual PG 34 0.7881 0.32 1.4
--.CIO.Z. 1990-09-25T04:51:43.30 10.0 undecidable manual SG 22 0.3108 0.4 0.9
--.ARV.Z. 1990-09-25T04:51:42.54 10.0 undecidable manual PG 357 0.5883 -0.65 1
--.ASS.Z. 1990-09-25T04:51:41.60 10.0 undecidable manual SG 304 0.2775 -0.54 0.5
--.MNS.Z. 1990-09-25T04:51:41.42 10.0 undecidable manual PG 202 0.5439 -0.95 0.6
--.SSO.Z. 1990-09-25T04:51:41.60 10.0 undecidable manual PG? 39 0.4995 0.06 0.7
--.ALP.Z. 1990-09-25T04:51:40.00 10.0 undecidable manual PG 104 0.444 -0.39 2.9
--.ASS.Z. 1990-09-25T04:51:37.30 10.0 undecidable manual PG 304 0.2775 0.16 1.7
--.CIO.Z. 1990-09-25T04:51:37.80 10.0 undecidable manual PG 22 0.3108 0.18 3.3
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