Earthquake with magnitude of Md 3.1 on date 26-04-1986 and time 04:22:39 (Italy) in region 2 km N Montereale (AQ)

A magnitude Md 3.1 earthquake occured in region: 2 km N Montereale (AQ), on

  • 26-04-1986 02:22:39 (UTC)
  • 26-04-1986 04:22:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.54, 13.25 at 4 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
Montereale AQ 2 2581 2581
Capitignano AQ 5 665 3246
Cagnano Amiterno AQ 9 1369 4615
Borbona RI 10 617 5232
Campotosto AQ 10 542 5774
Barete AQ 10 737 6511
Amatrice RI 11 2657 9168
Cittareale RI 11 482 9650
Pizzoli AQ 12 4326 13976
Posta RI 13 694 14670
Accumoli RI 17 667 15337
Micigliano RI 19 127 15464
Scoppito AQ 19 3727 19191
Crognaleto TE 19 1297 20488
Antrodoco RI 19 2588 23076

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km NW of L'Aquila (69753 inhabitants)
40 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
74 Km NE of Guidonia Montecelio (88673 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
74 Km NE of Tivoli (56533 inhabitants)
78 Km W of Chieti (51815 inhabitants)
80 Km W of Pescara (121014 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
96 Km NE of Roma (2864731 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 3.1 1986-04-26
02:22:39
42.54 13.25 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 26049
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-04-26 02:22:39 ± 0.406
Latitude 42.54 ± 0.02
Longitude 13.25 ± 0.02
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 26049

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) 2579
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.03651
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:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 26049
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:27:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1986-04-26T02:24:19.50 10.0 undecidable manual SN 342 0.0331 0.82 0.2
--.FO1.Z. 1986-04-26T02:23:42.00 10.0 undecidable manual PN 355 0.0365 0.25 1
--.RBL.Z. 1986-04-26T02:23:41.00 10.0 undecidable manual PN 3 0.0351 1.45 0.4
--.CTI.Z. 1986-04-26T02:23:38.00 10.0 undecidable manual PN 342 0.0331 1.44 0.4
--.ARV.Z. 1986-04-26T02:23:13.00 10.0 undecidable manual SG 347 0.0088 -0.55 0.5
--.RDP.Z. 1986-04-26T02:23:10.00 10.0 undecidable manual SG 207 0.0079 -0.15 0.8
--.DUI.Z. 1986-04-26T02:23:04.00 10.0 undecidable manual PN 134 0.0113 0.78 0.8
--.ASS.Z. 1986-04-26T02:23:03.00 10.0 undecidable manual SG 320 0.0061 -0.85 0.6
--.ARV.Z. 1986-04-26T02:22:58.10 10.0 undecidable manual PG 347 0.0088 -0.86 0.7
--.RDP.Z. 1986-04-26T02:22:57.00 10.0 undecidable manual PG 207 0.0079 0 1.8
--.MNS.Z. 1986-04-26T02:22:56.00 10.0 undecidable manual SG 249 0.004 -0.33 1.1
--.SD1.Z. 1986-04-26T02:22:56.50 10.0 undecidable manual PG 153 0.0083 -1.49 1
--.ASS.Z. 1986-04-26T02:22:52.50 10.0 undecidable manual PG 320 0.0061 -0.86 0.8
--.MNS.Z. 1986-04-26T02:22:49.50 10.0 positive manual PG 249 0.004 0.48 3.3
--.AQU.Z. 1986-04-26T02:22:44.00 10.0 undecidable manual PG 149 0.0019 0.03 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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