Earthquake with magnitude of Md 3.1 on date 22-09-1986 and time 20:41:27 (Italy) in region 4 km N Micigliano (RI)

A magnitude Md 3.1 earthquake occured in region: 4 km N Micigliano (RI), on

  • 22-09-1986 18:41:27 (UTC)
  • 22-09-1986 20:41:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.49, 13.07 at 7 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
Micigliano RI 4 127 127
Posta RI 4 694 821
Borbona RI 6 617 1438
Antrodoco RI 8 2588 4026
Borgo Velino RI 9 972 4998
Castel Sant'Angelo RI 11 1308 6306
Leonessa RI 12 2435 8741
Cagnano Amiterno AQ 13 1369 10110
Cantalice RI 14 2755 12865
Montereale AQ 15 2581 15446
Cittaducale RI 15 6828 22274
Poggio Bustone RI 15 2055 24329
Cittareale RI 16 482 24811
Rivodutri RI 18 1253 26064
Barete AQ 18 737 26801
Capitignano AQ 19 665 27466
Rieti RI 19 47698 75164
Pizzoli AQ 20 4326 79490
Concerviano RI 20 291 79781
Morro Reatino RI 20 373 80154

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
36 Km E of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
61 Km NE of Guidonia Montecelio (88673 inhabitants)
63 Km NE of Tivoli (56533 inhabitants)
80 Km E of Viterbo (67173 inhabitants)
82 Km NE of Roma (2864731 inhabitants)
88 Km SE of Perugia (166134 inhabitants)
89 Km W of Montesilvano (53738 inhabitants)
92 Km W of Chieti (51815 inhabitants)
92 Km N of Velletri (53303 inhabitants)
94 Km W of Pescara (121014 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 1986-09-22
18:41:27
42.49 13.07 7 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 34519
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-09-22 18:41:27 ± 0.544
Latitude 42.49 ± 0.02
Longitude 13.07 ± 0.04
Depth (km) 7 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 34519

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) 3441.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.03327
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 5
Type of magnitude Md
Reference to an origin 34519
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1986-09-22T18:42:24.00 10.0 undecidable manual PN 344 0.0333 -0.38 0.7
--.DUI.Z. 1986-09-22T18:42:11.50 10.0 undecidable manual SN 128 0.0119 1.66 0
--.SGO.Z. 1986-09-22T18:42:08.00 10.0 undecidable manual PN 138 0.023 -0.67 0.6
--.ARV.Z. 1986-09-22T18:42:03.50 10.0 undecidable manual SG 355 0.0091 1.42 0
--.SD1.Z. 1986-09-22T18:41:59.00 10.0 undecidable manual SG 144 0.0086 -1.2 0.1
--.RMP.Z. 1986-09-22T18:41:53.00 10.0 undecidable manual SG 202 0.0066 -0.04 0.7
--.CRE.Z. 1986-09-22T18:41:52.50 10.0 undecidable manual PN 324 0.0125 -0.24 1.4
--.DUI.Z. 1986-09-22T18:41:51.50 10.0 undecidable manual PN 128 0.0119 -0.27 1.5
--.ASS.Z. 1986-09-22T18:41:50.50 10.0 undecidable manual SG 332 0.0058 0.09 0.7
--.AM8.Z. 1986-09-22T18:41:48.90 10.0 undecidable manual PN 20 0.0101 -0.18 1.6
--.ARV.Z. 1986-09-22T18:41:47.30 10.0 undecidable manual PG 355 0.0091 0.02 1.7
--.SD1.Z. 1986-09-22T18:41:46.00 10.0 undecidable manual PG 144 0.0086 -0.2 1.6
--.RMP.Z. 1986-09-22T18:41:43.00 10.0 undecidable manual PG 202 0.0066 0.94 0.5
--.ASS.Z. 1986-09-22T18:41:40.50 10.0 negative manual PG 332 0.0058 -0.05 3.4
--.AQU.Z. 1986-09-22T18:41:39.50 10.0 undecidable manual SG 119 0.0025 1.38 0.1
--.AQU.Z. 1986-09-22T18:41:33.00 10.0 undecidable manual PG 119 0.0025 -0.45 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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