Earthquake with magnitude of Md 2.7 on date 17-01-1991 and time 23:46:12 (UTC) in region 4 km NE Montenars (UD)

A magnitude Md 2.7 earthquake occured in region: 4 km NE Montenars (UD), on

  • 17-01-1991 23:46:12 (UTC)
  • 18-01-1991 00:46:12 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 46.29, 13.2 at 0 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
Montenars UD 4 538 538
Gemona del Friuli UD 5 10964 11502
Lusevera UD 6 643 12145
Artegna UD 6 2885 15030
Venzone UD 7 2117 17147
Magnano in Riviera UD 7 2336 19483
Bordano UD 7 754 20237
Tarcento UD 8 9012 29249
Trasaghis UD 9 2227 31476
Osoppo UD 10 2936 34412
Buja UD 10 6563 40975
Treppo Grande UD 11 1708 42683
Nimis UD 11 2740 45423
Resiutta UD 12 309 45732
Amaro UD 12 823 46555
Taipana UD 12 636 47191
Resia UD 13 1033 48224
Cassacco UD 13 2938 51162
Moggio Udinese UD 13 1714 52876
Attimis UD 14 1805 54681
Tricesimo UD 14 7600 62281
Colloredo di Monte Albano UD 14 2223 64504
Majano UD 15 5945 70449
Cavazzo Carnico UD 15 1052 71501
Chiusaforte UD 16 672 72173
Reana del Rojale UD 16 4966 77139
Pagnacco UD 18 5044 82183
Forgaria nel Friuli UD 19 1786 83969
Faedis UD 19 2945 86914
Tolmezzo UD 19 10440 97354
Verzegnis UD 19 863 98217
Vito d'Asio PN 19 769 98986
Moruzzo UD 20 2456 101442
Dogna UD 20 175 101617

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Udine (99169 inhabitants)
56 Km NE of Pordenone (51229 inhabitants)
84 Km NW of Trieste (204420 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 2.7
M 2.5
1991-01-17
23:46:12
46.29 13.2 0 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 134569
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-01-17 23:46:12 ± 0.246
Latitude 46.29 ± 0.02
Longitude 13.20 ± 0.02
Depth (km) 0 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 134569

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) 3007.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00372
Epicentral distance of station farthest from the epicenter (degree) 0.00979
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:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 134569
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:05:28

M:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 134569
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:19:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1991-01-17T23:46:51.80 10.0 undecidable manual SG 257 0.0098 -0.12 0.5
--.LJU.Z. 1991-01-17T23:46:48.00 10.0 undecidable manual SG 104 0.0086 0.69 0.4
--.TRI.Z. 1991-01-17T23:46:39.62 10.0 undecidable manual SG 145 0.0063 0.38 0.5
--.CTI.Z. 1991-01-17T23:46:35.80 10.0 undecidable manual PG 257 0.0098 0.38 1
--.VOY.Z. 1991-01-17T23:46:34.10 10.0 undecidable manual SG 117 0.0049 0.13 0.6
--.LJU.Z. 1991-01-17T23:46:33.60 10.0 undecidable manual PG 104 0.0086 0.84 0.4
--.TRI.Z. 1991-01-17T23:46:28.11 10.0 undecidable manual PG 145 0.0063 0.01 1.7
--.FVI.Z. 1991-01-17T23:46:28.53 10.0 undecidable manual SG 316 0.0037 -0.42 0.5
--.VOY.Z. 1991-01-17T23:46:24.20 10.0 undecidable manual PG 117 0.0049 -0.86 1
--.FVI.Z. 1991-01-17T23:46:22.27 10.0 negative manual PG 316 0.0037 0.11 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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