Earthquake with magnitude of Md 2.9 on date 12-03-1985 and time 21:25:30 (UTC) in region 4 km NW Norcia (PG)

A magnitude Md 2.9 earthquake occured in region: 4 km NW Norcia (PG), on

  • 12-03-1985 21:25:30 (UTC)
  • 12-03-1985 22:25:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.82, 13.05 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 4 4957 4957
Preci PG 7 724 5681
Cerreto di Spoleto PG 11 1075 6756
Cascia PG 12 3217 9973
Castelsantangelo sul Nera MC 12 281 10254
Visso MC 13 1107 11361
Sellano PG 13 1079 12440
Poggiodomo PG 15 117 12557
Ussita MC 16 444 13001
Vallo di Nera PG 17 364 13365
Monte Cavallo MC 20 145 13510

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km E of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
56 Km W of Teramo (54892 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
63 Km SE of Perugia (166134 inhabitants)
90 Km NE of Viterbo (67173 inhabitants)
95 Km N of Guidonia Montecelio (88673 inhabitants)
96 Km W of Montesilvano (53738 inhabitants)
97 Km SW of Ancona (100861 inhabitants)
97 Km N of Tivoli (56533 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 2.9
ML-VAX 2.6
1985-03-12
21:25:30
42.82 13.05 5 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 3209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-12 21:25:30 ± 0.498
Latitude 42.82 ± 0.01
Longitude 13.05 ± 0.05
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 3209

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) 4549.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.01562
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:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 3209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:08:01

ML:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 3209
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
--.SD1.Z. 1985-03-12T21:26:13.00 10.0 undecidable manual SN 152 0.0112 0.7 0.3
--.SGG.Z. 1985-03-12T21:26:03.20 10.0 undecidable manual PN 145 0.0156 1.59 0.1
--.SD1.Z. 1985-03-12T21:25:54.50 10.0 undecidable manual PN 152 0.0112 -0.34 1
--.RDP.Z. 1985-03-12T21:25:53.50 10.0 undecidable manual PN 193 0.0098 0.77 0.8
--.RMP.Z. 1985-03-12T21:25:52.00 10.0 undecidable manual PG 194 0.0093 0.11 1.3
--.MNS.Z. 1985-03-12T21:25:50.00 10.0 undecidable manual SG 212 0.0046 -0.29 0.5
--.AR1.Z. 1985-03-12T21:25:44.60 10.0 undecidable manual PG 353 0.0062 -0.69 1
--.PO9.Z. 1985-03-12T21:25:41.00 10.0 undecidable manual SG 198 0.0023 -0.08 0.6
--.MNS.Z. 1985-03-12T21:25:41.00 10.0 undecidable manual PG 212 0.0046 -1.13 0.5
--.AQU.Z. 1985-03-12T21:25:41.00 10.0 undecidable manual PG 150 0.0048 -1.45 0.3
--.AS1.Z. 1985-03-12T21:25:39.80 10.0 undecidable manual PG 309 0.0034 0.27 2.8
--.PO9.Z. 1985-03-12T21:25:37.00 10.0 negative manual PG 198 0.0023 0.2 2.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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