Earthquake with magnitude of Md 2.5 on date 04-03-1985 and time 03:26:10 (Italy) in region 5 km SE Polino (TR)

A magnitude Md 2.5 earthquake occured in region: 5 km SE Polino (TR), on

  • 04-03-1985 02:26:10 (UTC)
  • 04-03-1985 03:26:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.56, 12.89 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
Polino TR 5 233 233
Leonessa RI 6 2435 2668
Rivodutri RI 6 1253 3921
Morro Reatino RI 6 373 4294
Poggio Bustone RI 7 2055 6349
Labro RI 9 374 6723
Arrone TR 10 2763 9486
Cantalice RI 11 2755 12241
Ferentillo TR 11 1913 14154
Monteleone di Spoleto PG 11 599 14753
Montefranco TR 11 1276 16029
Colli sul Velino RI 12 533 16562
Greccio RI 16 1558 18120
Poggiodomo PG 17 117 18237
Posta RI 17 694 18931
Scheggino PG 18 461 19392
Rieti RI 18 47698 67090
Micigliano RI 18 127 67217
Sant'Anatolia di Narco PG 20 564 67781
Contigliano RI 20 3783 71564
Cittaducale RI 20 6828 78392
Cascia PG 20 3217 81609

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Terni (111501 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
48 Km NW of L'Aquila (69753 inhabitants)
64 Km N of Guidonia Montecelio (88673 inhabitants)
67 Km E of Viterbo (67173 inhabitants)
67 Km N of Tivoli (56533 inhabitants)
67 Km W of Teramo (54892 inhabitants)
73 Km SE of Perugia (166134 inhabitants)
82 Km NE of Roma (2864731 inhabitants)
98 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
ML-VAX 2.2
1985-03-04
02:26:10
42.56 12.89 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-04 02:26:10 ± 0.284
Latitude 42.56 ± 0.02
Longitude 12.89 ± 0.03
Depth (km) 10 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2959

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) 2967.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00032
Epicentral distance of station farthest from the epicenter (degree) 0.00979
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 2959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:47

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 2959
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. 1985-03-04T02:26:46.50 10.0 undecidable manual SN 141 0.0098 -0.53 0.3
--.RMP.Z. 1985-03-04T02:26:39.50 10.0 undecidable manual SG 190 0.0069 2.33 0
--.SD1.Z. 1985-03-04T02:26:32.50 10.0 undecidable manual PN 141 0.0098 0.82 0.6
--.AS1.Z. 1985-03-04T02:26:30.40 10.0 undecidable manual SG 340 0.0047 0.78 0.4
--.AR1.Z. 1985-03-04T02:26:29.50 10.0 undecidable manual PG 2 0.0084 0.36 1.1
--.AQU.Z. 1985-03-04T02:26:26.30 10.0 undecidable manual SG 118 0.0038 -0.1 1
--.AS1.Z. 1985-03-04T02:26:21.00 10.0 undecidable manual PG 340 0.0047 -0.63 1.2
--.RMP.N. 1985-03-04T02:26:21.50 10.0 undecidable manual PG! 190 0.0069 -4.49 0
--.MNS.Z. 1985-03-04T02:26:19.60 10.0 undecidable manual SG 221 0.0021 -0.63 0.7
--.AQU.Z. 1985-03-04T02:26:18.70 10.0 undecidable manual PG 118 0.0038 -1.07 0.5
--.MNS.Z. 1985-03-04T02:26:15.80 10.0 negative manual PG 221 0.0021 -0.4 2.9
--.PO9.Z. 1985-03-04T02:26:14.60 10.0 undecidable manual SG 72 0.0003 0.03 1
--.PO9.Z. 1985-03-04T02:26:13.10 10.0 undecidable manual PG 72 0.0003 0.16 3.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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