Earthquake with magnitude of Md 2.6 on date 09-11-1987 and time 07:11:52 (UTC) in region 5 km W Accumoli (RI)

A magnitude Md 2.6 earthquake occured in region: 5 km W Accumoli (RI), on

  • 09-11-1987 07:11:52 (UTC)
  • 09-11-1987 08:11:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.71, 13.19 at 5 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 5 667 667
Cittareale RI 10 482 1149
Arquata del Tronto AP 12 1178 2327
Norcia PG 12 4957 7284
Amatrice RI 12 2657 9941
Cascia PG 14 3217 13158
Montegallo AP 19 523 13681
Acquasanta Terme AP 20 2916 16597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km W of Teramo (54892 inhabitants)
43 Km NW of L'Aquila (69753 inhabitants)
47 Km E of Terni (111501 inhabitants)
48 Km SE of Foligno (57155 inhabitants)
79 Km SE of Perugia (166134 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km W of Pescara (121014 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
90 Km W of Chieti (51815 inhabitants)
94 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 2.6
ML-VAX 2.2
1987-11-09
07:11:52
42.71 13.19 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 58359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-11-09 07:11:52 ± 0.142
Latitude 42.71 ± 0.01
Longitude 13.19 ± 0.01
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 58359

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) 1490.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.01392
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 58359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:55:51

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 58359
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
--.SS9.Z. 1987-11-09T07:12:41.70 10.0 undecidable manual SN 322 0.0139 0.72 0.2
--.CRE.Z. 1987-11-09T07:12:34.38 10.0 undecidable manual SN 315 0.0115 -0.14 0.5
--.SDI.Z. 1987-11-09T07:12:30.60 10.0 undecidable manual SN 155 0.0099 -0.2 0.5
--.AM8.Z. 1987-11-09T07:12:24.64 10.0 undecidable manual SG 19 0.008 0.88 0.3
--.CP9.Z. 1987-11-09T07:12:23.89 10.0 undecidable manual SG 191 0.0078 1.04 0.1
--.ARV.Z. 1987-11-09T07:12:22.20 10.0 undecidable manual SG 347 0.0072 1.13 0.1
--.SS9.Z. 1987-11-09T07:12:20.47 10.0 undecidable manual PN 322 0.0139 0.09 1.1
--.AZ9.Z. 1987-11-09T07:12:18.79 10.0 undecidable manual SG 165 0.0066 -0.18 0.6
--.CRE.Z. 1987-11-09T07:12:17.48 10.0 undecidable manual PN 315 0.0115 0.83 0.5
--.SDI.Z. 1987-11-09T07:12:15.52 10.0 undecidable manual PN 155 0.0099 1.33 0.1
--.ASS.Z. 1987-11-09T07:12:11.27 10.0 undecidable manual SG 312 0.0047 -0.74 0.3
--.AM8.Z. 1987-11-09T07:12:10.12 10.0 undecidable manual PG 19 0.008 -0.32 2.8
--.CP9.Z. 1987-11-09T07:12:10.15 10.0 undecidable manual PG 191 0.0078 0.24 1.5
--.CM8.Z. 1987-11-09T07:12:10.24 10.0 undecidable manual SG 356 0.0044 -0.48 0.7
--.MNS.Z. 1987-11-09T07:12:10.48 10.0 undecidable manual SG 229 0.0044 -0.46 0.5
--.ARV.Z. 1987-11-09T07:12:08.57 10.0 undecidable manual PG 347 0.0072 -0.32 1.5
--.AZ9.Z. 1987-11-09T07:12:07.44 10.0 undecidable manual PG 165 0.0066 -0.23 1.5
--.ASS.Z. 1987-11-09T07:12:03.46 10.0 undecidable manual PG 312 0.0047 -0.19 1.6
--.MNS.Z. 1987-11-09T07:12:02.45 10.0 positive manual PG 229 0.0044 -0.59 2.1
--.ALP.Z. 1987-11-09T07:12:02.62 10.0 undecidable manual SG 75 0.0026 -0.88 0.3
--.CM8.Z. 1987-11-09T07:12:02.21 10.0 undecidable manual PG 356 0.0044 -0.7 1.7
--.ALP.Z. 1987-11-09T07:11:58.58 10.0 undecidable manual PG 75 0.0026 -0.16 3.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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