Earthquake with magnitude of Md 2.8 on date 21-07-1985 and time 23:36:55 (Italy) in region 6 km N Capitignano (AQ)

A magnitude Md 2.8 earthquake occured in region: 6 km N Capitignano (AQ), on

  • 21-07-1985 21:36:55 (UTC)
  • 21-07-1985 23:36:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.57, 13.29 at 9 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
Capitignano AQ 6 665 665
Amatrice RI 6 2657 3322
Montereale AQ 7 2581 5903
Campotosto AQ 7 542 6445
Cittareale RI 12 482 6927
Barete AQ 14 737 7664
Cagnano Amiterno AQ 14 1369 9033
Accumoli RI 14 667 9700
Borbona RI 15 617 10317
Pizzoli AQ 15 4326 14643
Crognaleto TE 16 1297 15940
Posta RI 17 694 16634
Cortino TE 19 656 17290

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NW of L'Aquila (69753 inhabitants)
35 Km W of Teramo (54892 inhabitants)
53 Km E of Terni (111501 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
76 Km W of Chieti (51815 inhabitants)
77 Km W of Pescara (121014 inhabitants)
79 Km NE of Guidonia Montecelio (88673 inhabitants)
79 Km NE of Tivoli (56533 inhabitants)
95 Km SE of Perugia (166134 inhabitants)
99 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 2.8 1985-07-21
21:36:55
42.57 13.29 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 10579
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-07-21 21:36:55 ± 0.212
Latitude 42.57 ± 0.01
Longitude 13.29 ± 0.02
Depth (km) 9 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 10579

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) 1921.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.01287
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:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 10579
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.DUI.Z. 1985-07-21T21:37:37.00 10.0 undecidable manual SN 136 0.0113 0.68 0.2
--.CH1.Z. 1985-07-21T21:37:22.00 10.0 undecidable manual PN 317 0.0129 0.43 0.8
--.DUI.Z. 1985-07-21T21:37:20.00 10.0 undecidable manual PN 136 0.0113 0.91 0.3
--.AS1.Z. 1985-07-21T21:37:19.50 10.0 undecidable manual SG 316 0.0061 0.05 0.7
--.CM2.Z. 1985-07-21T21:37:18.70 10.0 undecidable manual SG 350 0.0056 0.83 0.4
--.AR1.Z. 1985-07-21T21:37:14.50 10.0 undecidable manual PG 344 0.0086 -0.08 1.4
--.RDP.Z. 1985-07-21T21:37:13.50 10.0 undecidable manual PG 207 0.0083 -0.36 1.2
--.MNS.Z. 1985-07-21T21:37:12.00 10.0 undecidable manual SG 247 0.0044 -1.4 0
--.AS1.Z. 1985-07-21T21:37:09.00 10.0 undecidable manual PG 316 0.0061 -0.35 1.4
--.CM2.Z. 1985-07-21T21:37:07.60 10.0 undecidable manual PG 350 0.0056 -0.84 0.6
--.PO9.Z. 1985-07-21T21:37:07.00 10.0 undecidable manual SG 270 0.0023 1.05 0.2
--.ALP.Z. 1985-07-21T21:37:06.90 10.0 undecidable manual SG 44 0.0026 -0.09 1
--.AQU.Z. 1985-07-21T21:37:05.00 10.0 undecidable manual SG 159 0.0021 -0.1 0.7
--.MNS.Z. 1985-07-21T21:37:05.00 10.0 undecidable manual PG 247 0.0044 -0.87 0.6
--.ALP.Z. 1985-07-21T21:37:02.00 10.0 positive manual PG 44 0.0026 -0.16 3.3
--.PO9.Z. 1985-07-21T21:37:02.00 10.0 positive manual PG 270 0.0023 0.45 2.6
--.AQU.Z. 1985-07-21T21:37:01.00 10.0 undecidable manual PG 159 0.0021 -0.07 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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