Earthquake with magnitude of Md 2.5 on date 08-02-1985 and time 03:04:51 (UTC) in region 1 km NE Preci (PG)

A magnitude Md 2.5 earthquake occured in region: 1 km NE Preci (PG), on

  • 08-02-1985 03:04:51 (UTC)
  • 08-02-1985 04:04:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.88, 13.05 at 7 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 1 724 724
Visso MC 6 1107 1831
Castelsantangelo sul Nera MC 9 281 2112
Sellano PG 10 1079 3191
Ussita MC 10 444 3635
Norcia PG 11 4957 8592
Monte Cavallo MC 13 145 8737
Cerreto di Spoleto PG 13 1075 9812
Fiordimonte MC 17 202 10014
Pieve Torina MC 18 1458 11472
Cascia PG 19 3217 14689
Bolognola MC 19 142 14831
Fiastra MC 19 559 15390
Acquacanina MC 19 121 15511
Vallo di Nera PG 20 364 15875
Pievebovigliana MC 20 866 16741

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Foligno (57155 inhabitants)
49 Km NE of Terni (111501 inhabitants)
59 Km E of Perugia (166134 inhabitants)
59 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
93 Km NE of Viterbo (67173 inhabitants)
99 Km W of Montesilvano (53738 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 1985-02-08
03:04:51
42.89 13.05 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 1329
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-08 03:04:51 ± 0.238
Latitude 42.89 ± 0.01
Longitude 13.05 ± 0.02
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 1329

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) 2030.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.01166
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 1329
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:06:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CH1.Z. 1985-02-08T03:05:29.50 10.0 undecidable manual SN 313 0.0098 0.7 0.1
--.SD1.Z. 1985-02-08T03:05:16.00 10.0 undecidable manual PN 154 0.0117 0.01 1.2
--.AR1.Z. 1985-02-08T03:05:14.00 10.0 undecidable manual SG 352 0.0055 0.1 1.1
--.CH1.Z. 1985-02-08T03:05:12.50 10.0 undecidable manual PN 313 0.0098 -0.59 0.5
--.MNS.Z. 1985-02-08T03:05:12.00 10.0 undecidable manual SG 208 0.0051 -0.28 0.6
--.AS1.Z. 1985-02-08T03:05:05.50 10.0 undecidable manual SG 301 0.003 0.56 0.4
--.PO9.Z. 1985-02-08T03:05:04.00 10.0 undecidable manual SG 194 0.0028 -0.2 1
--.AR1.Z. 1985-02-08T03:05:04.00 10.0 undecidable manual PG 352 0.0055 -0.48 0.9
--.AQU.Z. 1985-02-08T03:05:04.50 10.0 undecidable manual PG 153 0.0053 0.52 0.9
--.MNS.Z. 1985-02-08T03:05:03.00 10.0 undecidable manual PG 208 0.0051 -0.55 0.8
--.AS1.Z. 1985-02-08T03:04:59.50 10.0 undecidable manual PG 301 0.003 0.19 1.7
--.PO9.Z. 1985-02-08T03:04:59.20 10.0 positive manual PG 194 0.0028 0.31 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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