Earthquake with magnitude of Md 2.9 on date 02-08-1985 and time 09:39:05 (Italy) in region 4 km SW Accumoli (RI)

A magnitude Md 2.9 earthquake occured in region: 4 km SW Accumoli (RI), on

  • 02-08-1985 07:39:05 (UTC)
  • 02-08-1985 09:39:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.21 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
Accumoli RI 4 667 667
Cittareale RI 8 482 1149
Amatrice RI 8 2657 3806
Arquata del Tronto AP 13 1178 4984
Norcia PG 16 4957 9941
Montereale AQ 17 2581 12522
Cascia PG 17 3217 15739
Campotosto AQ 18 542 16281
Capitignano AQ 19 665 16946
Borbona RI 19 617 17563
Posta RI 19 694 18257
Acquasanta Terme AP 19 2916 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of L'Aquila (69753 inhabitants)
40 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km W of Pescara (121014 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
86 Km W of Chieti (51815 inhabitants)
95 Km E of Viterbo (67173 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 1985-08-02
07:39:05
42.68 13.21 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-02 07:39:05 ± 0.933
Latitude 42.68 ± 0.01
Longitude 13.21 ± 0.02
Depth (km) 10 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11209

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) 2236
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.00955
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 11209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.RDP.Z. 1985-08-02T07:39:40.00 10.0 undecidable manual SG 202 0.0088 0.38 0.4
--.SD1.Z. 1985-08-02T07:39:28.00 10.0 undecidable manual PN 155 0.0096 1.35 0.2
--.AS1.Z. 1985-08-02T07:39:27.00 10.0 undecidable manual SG 313 0.005 0.95 0.3
--.RDP.Z. 1985-08-02T07:39:26.80 10.0 undecidable manual PG 202 0.0088 1.39 0.2
--.AM1.Z. 1985-08-02T07:39:24.10 10.0 undecidable manual PG 18 0.0083 -0.06 1.2
--.AR1.Z. 1985-08-02T07:39:22.50 10.0 undecidable manual PG 346 0.0076 -0.29 1.2
--.MNS.Z. 1985-08-02T07:39:22.00 10.0 undecidable manual SG 233 0.0044 -1.59 0.1
--.AQU.Z. 1985-08-02T07:39:19.50 10.0 undecidable manual SG 156 0.0031 0.33 0.6
--.CM2.Z. 1985-08-02T07:39:17.00 10.0 undecidable manual PG 354 0.0046 0.26 2.9
--.AS1.Z. 1985-08-02T07:39:17.50 10.0 undecidable manual PG 313 0.005 -0.07 1.6
--.ALP.Z. 1985-08-02T07:39:16.50 10.0 undecidable manual SG 68 0.0025 -0.44 0.8
--.PO9.Z. 1985-08-02T07:39:15.00 10.0 undecidable manual SG 243 0.0019 -0.11 0.6
--.MNS.Z. 1985-08-02T07:39:15.00 10.0 positive manual PG 233 0.0044 -1.15 1
--.AQU.Z. 1985-08-02T07:39:13.00 10.0 undecidable manual PG 156 0.0031 -0.6 1.2
--.PO9.Z. 1985-08-02T07:39:12.00 10.0 undecidable manual PG 243 0.0019 0.75 1
--.ALP.Z. 1985-08-02T07:39:11.90 10.0 positive manual PG 68 0.0025 -0.41 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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