Earthquake with magnitude of Md 2.7 on date 29-10-1987 and time 07:54:28 (UTC) in region 8 km W Accumoli (RI)

A magnitude Md 2.7 earthquake occured in region: 8 km W Accumoli (RI), on

  • 29-10-1987 07:54:28 (UTC)
  • 29-10-1987 08:54:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7, 13.15 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 8 667 667
Cittareale RI 9 482 1149
Cascia PG 11 3217 4366
Norcia PG 12 4957 9323
Amatrice RI 14 2657 11980
Arquata del Tronto AP 15 1178 13158
Monteleone di Spoleto PG 17 599 13757
Poggiodomo PG 17 117 13874
Posta RI 19 694 14568

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Terni (111501 inhabitants)
43 Km NW of L'Aquila (69753 inhabitants)
46 Km W of Teramo (54892 inhabitants)
46 Km SE of Foligno (57155 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km W of Montesilvano (53738 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
91 Km W of Pescara (121014 inhabitants)
92 Km W of Chieti (51815 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 2.7
ML-VAX 2.2
1987-10-29
07:54:28
42.7 13.15 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 57859
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-10-29 07:54:28 ± 0.214
Latitude 42.70 ± 0.01
Longitude 13.15 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 57859

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) 2297.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.01384
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:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 57859
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:55:27

ML:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 57859
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. 1987-10-29T07:55:17.59 10.0 undecidable manual SN 323 0.0138 0.29 0.5
--.CRE.Z. 1987-10-29T07:55:11.20 10.0 undecidable manual SN 317 0.0114 0.26 0.5
--.SDI.Z. 1987-10-29T07:55:08.10 10.0 undecidable manual SN 153 0.0099 1.34 0.2
--.AM8.Z. 1987-10-29T07:55:02.66 10.0 undecidable manual SG 21 0.0082 1.67 0.2
--.RMP.Z. 1987-10-29T07:55:02.20 10.0 undecidable manual SG 200 0.0084 0.35 0.6
--.SS9.Z. 1987-10-29T07:54:58.47 10.0 undecidable manual PN 323 0.0138 1.7 0.2
--.ARV.Z. 1987-10-29T07:54:57.16 10.0 undecidable manual SG 349 0.0073 -0.65 0.5
--.CRE.Z. 1987-10-29T07:54:54.29 10.0 positive manual PN 317 0.0114 1.29 1.1
--.SDI.Z. 1987-10-29T07:54:50.62 10.0 undecidable manual PN 153 0.0099 -0.06 1.5
--.RMP.Z. 1987-10-29T07:54:47.50 10.0 undecidable manual PG 200 0.0084 -0.35 1.5
--.CP9.Z. 1987-10-29T07:54:46.72 10.0 undecidable manual PG 190 0.0075 0.67 1.3
--.CM8.Z. 1987-10-29T07:54:46.13 10.0 undecidable manual SG 0 0.0045 -1.49 0.3
--.AM8.Z. 1987-10-29T07:54:46.80 10.0 undecidable manual PG 21 0.0082 -0.55 1.4
--.ARV.Z. 1987-10-29T07:54:45.50 10.0 undecidable manual PG 349 0.0073 -0.02 1.7
--.MNS.Z. 1987-10-29T07:54:45.18 10.0 undecidable manual SG 228 0.0041 -1.24 0.3
--.ALP.Z. 1987-10-29T07:54:41.71 10.0 undecidable manual SG 74 0.0028 0.5 0.9
--.MC8.Z. 1987-10-29T07:54:41.51 10.0 undecidable manual PG 18 0.0057 -0.56 1.4
--.CM8.Z. 1987-10-29T07:54:38.28 10.0 undecidable manual PG 0 0.0045 -1.36 0.6
--.MNS.Z. 1987-10-29T07:54:38.13 10.0 positive manual PG 228 0.0041 -0.81 2.3
--.ALP.Z. 1987-10-29T07:54:35.53 10.0 positive manual PG 74 0.0028 -0.4 3.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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