Earthquake with magnitude of Md 2.6 on date 18-04-1994 and time 01:33:21 (Italy) in region 6 km NE Sellano (PG)

A magnitude Md 2.6 earthquake occured in region: 6 km NE Sellano (PG), on

  • 17-04-1994 23:33:21 (UTC)
  • 18-04-1994 01:33:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.93, 12.99 at 4 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
Sellano PG 6 1079 1079
Preci PG 7 724 1803
Monte Cavallo MC 8 145 1948
Visso MC 8 1107 3055
Ussita MC 12 444 3499
Cerreto di Spoleto PG 13 1075 4574
Castelsantangelo sul Nera MC 14 281 4855
Pieve Torina MC 14 1458 6313
Fiordimonte MC 15 202 6515
Serravalle di Chienti MC 17 1070 7585
Norcia PG 17 4957 12542
Pievebovigliana MC 17 866 13408
Muccia MC 18 915 14323
Fiastra MC 18 559 14882
Acquacanina MC 19 121 15003

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
53 Km E of Perugia (166134 inhabitants)
66 Km W of Teramo (54892 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
92 Km NE of Viterbo (67173 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 2.6
ML-VAX 1.9
1994-04-17
23:33:21
42.93 12.99 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 207869
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1994-04-17 23:33:21 ± 0.412
Latitude 42.93 ± 0.01
Longitude 12.99 ± 0.03
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 207869

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) 2778.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 155
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.01222
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 207869
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 20:15:50

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 207869
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
--.CRE.Z. 1994-04-17T23:33:58.50 10.0 undecidable manual SG 312 0.0092 0.91 0.2
--.SDI.Z. 1994-04-17T23:33:47.23 10.0 undecidable manual PN 152 0.0122 0.43 1
--.AQU.Z. 1994-04-17T23:33:44.93 10.0 undecidable manual SG 151 0.0057 -0.06 0.7
--.RSM.Z. 1994-04-17T23:33:43.82 10.0 undecidable manual PG 338 0.0096 0.98 0.3
--.MNS.Z. 1994-04-17T23:33:42.66 10.0 undecidable manual SG 202 0.0053 -0.38 0.6
--.ARV.Z. 1994-04-17T23:33:41.82 10.0 undecidable manual SG 356 0.0051 -0.82 0.2
--.CRE.Z. 1994-04-17T23:33:41.52 10.0 undecidable manual PG 312 0.0092 -0.38 1.2
--.AQU.Z. 1994-04-17T23:33:35.24 10.0 undecidable manual PG 151 0.0057 0.35 1.5
--.MNS.Z. 1994-04-17T23:33:33.20 10.0 undecidable manual PG 202 0.0053 -0.55 1.1
--.ARV.Z. 1994-04-17T23:33:32.73 10.0 undecidable manual PG 356 0.0051 -0.8 0.6
--.ASS.Z. 1994-04-17T23:33:32.50 10.0 undecidable manual SG 298 0.0025 0.05 0.7
--.ASS.Z. 1994-04-17T23:33:27.40 10.0 positive manual PG 298 0.0025 0.02 3.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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