Earthquake with magnitude of Md 2.5 on date 02-06-1985 and time 02:50:40 (UTC) in region 3 km W Narni (TR)

A magnitude Md 2.5 earthquake occured in region: 3 km W Narni (TR), on

  • 02-06-1985 02:50:40 (UTC)
  • 02-06-1985 04:50:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.53, 12.48 at 10 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
Narni TR 3 19785 19785
Amelia TR 7 11897 31682
Orte VT 11 8923 40605
Penna in Teverina TR 11 1099 41704
San Gemini TR 11 5018 46722
Otricoli TR 12 1869 48591
Giove TR 13 1928 50519
Lugnano in Teverina TR 13 1494 52013
Montecastrilli TR 14 5022 57035
Terni TR 14 111501 168536
Avigliano Umbro TR 15 2558 171094
Stroncone TR 15 4917 176011
Attigliano TR 16 2028 178039
Bassano in Teverina VT 16 1313 179352
Calvi dell'Umbria TR 16 1856 181208
Alviano TR 16 1463 182671
Vasanello VT 16 4068 186739
Configni RI 18 633 187372
Guardea TR 18 1836 189208
Gallese VT 18 2849 192057
Magliano Sabina RI 19 3774 195831
Acquasparta TR 19 4778 200609
Bomarzo VT 19 1805 202414

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Terni (111501 inhabitants)
33 Km E of Viterbo (67173 inhabitants)
51 Km SW of Foligno (57155 inhabitants)
62 Km NW of Guidonia Montecelio (88673 inhabitants)
65 Km S of Perugia (166134 inhabitants)
68 Km NW of Tivoli (56533 inhabitants)
71 Km N of Roma (2864731 inhabitants)
74 Km NE of Civitavecchia (52991 inhabitants)
78 Km W of L'Aquila (69753 inhabitants)
86 Km N of Fiumicino (78395 inhabitants)
95 Km N of Pomezia (62966 inhabitants)
97 Km N of Velletri (53303 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 2.5 1985-06-02
02:50:40
42.53 12.48 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 7819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-06-02 02:50:40 ± 0.558
Latitude 42.53 ± 0.03
Longitude 12.48 ± 0.05
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 7819

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) 5588.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
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) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.01044
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 7819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:11:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-06-02T02:51:20.00 10.0 undecidable manual SN 341 0.0104 1.63 0.2
--.AS1.Z. 1985-06-02T02:51:01.50 10.0 undecidable manual SG 13 0.0049 1.8 0.2
--.CH1.Z. 1985-06-02T02:51:01.50 10.0 undecidable manual PN 341 0.0104 -0.74 1.2
--.RDP.Z. 1985-06-02T02:50:56.50 10.0 undecidable manual PG 167 0.007 0.56 1.8
--.PO9.Z. 1985-06-02T02:50:54.00 10.0 undecidable manual SG 82 0.0031 0.87 0.6
--.AS1.Z. 1985-06-02T02:50:50.50 10.0 undecidable manual PG 13 0.0049 -0.96 1.4
--.PO9.Z. 1985-06-02T02:50:47.00 10.0 undecidable manual PG 82 0.0031 -0.66 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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