Earthquake with magnitude of Md 3.1 on date 07-03-1987 and time 14:45:38 (Italy) in region 6 km E Accumoli (RI)

A magnitude Md 3.1 earthquake occured in region: 6 km E Accumoli (RI), on

  • 07-03-1987 13:45:38 (UTC)
  • 07-03-1987 14:45:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.69, 13.32 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 6 667 667
Amatrice RI 7 2657 3324
Arquata del Tronto AP 9 1178 4502
Acquasanta Terme AP 12 2916 7418
Cittareale RI 15 482 7900
Campotosto AQ 15 542 8442
Valle Castellana TE 16 977 9419
Montegallo AP 17 523 9942
Rocca Santa Maria TE 17 537 10479
Cortino TE 17 656 11135
Capitignano AQ 19 665 11800
Montereale AQ 19 2581 14381

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km W of Teramo (54892 inhabitants)
38 Km N of L'Aquila (69753 inhabitants)
57 Km E of Terni (111501 inhabitants)
58 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
91 Km NE of Tivoli (56533 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 1987-03-07
13:45:38
42.69 13.32 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 42499
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-03-07 13:45:38 ± 0.263
Latitude 42.69 ± 0.01
Longitude 13.32 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 42499

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) 3035.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.03521
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

Md:3.1

Field Value
Value 3.1
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 42499
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:42:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CTI.Z. 1987-03-07T13:47:14.00 10.0 undecidable manual SN 341 0.032 -0.54 0.4
--.FOI.Z. 1987-03-07T13:46:40.00 10.0 undecidable manual PN 354 0.0352 1.31 0.5
--.RBL.Z. 1987-03-07T13:46:37.00 10.0 undecidable manual PN 2 0.0338 0.61 1
--.CTI.Z. 1987-03-07T13:46:34.50 10.0 undecidable manual PN 341 0.032 0.74 0.9
--.MF9.Z. 1987-03-07T13:46:28.00 10.0 undecidable manual SN 318 0.0142 0.39 0.8
--.BDI.Z. 1987-03-07T13:46:19.50 10.0 undecidable manual PN 305 0.0216 1.59 0.4
--.RMP.Z. 1987-03-07T13:46:13.00 10.0 undecidable manual SG 207 0.0089 0.27 0.8
--.AM8.Z. 1987-03-07T13:46:10.50 10.0 undecidable manual SG 13 0.0079 1.28 0.3
--.ARV.Z. 1987-03-07T13:46:08.00 10.0 undecidable manual SG 341 0.0076 -0.28 0.8
--.MF9.Z. 1987-03-07T13:46:08.00 10.0 undecidable manual PN 318 0.0142 1.34 0.8
--.MAO.Z. 1987-03-07T13:46:06.00 10.0 undecidable manual PN 261 0.0145 -1.09 1
--.CRE.Z. 1987-03-07T13:46:04.00 10.0 undecidable manual PN 313 0.0122 0.41 2
--.ASS.Z. 1987-03-07T13:46:00.50 10.0 undecidable manual SG 307 0.0055 -0.09 1.3
--.RMP.Z. 1987-03-07T13:45:58.00 10.0 undecidable manual PG 207 0.0089 -0.08 2.1
--.CM8.Z. 1987-03-07T13:45:56.40 10.0 undecidable manual SG 345 0.0046 -1.19 0.4
--.ARV.Z. 1987-03-07T13:45:54.50 10.0 undecidable manual PG 341 0.0076 -1 1.2
--.AM8.Z. 1987-03-07T13:45:54.90 10.0 undecidable manual PG 13 0.0079 -1.15 1
--.AQU.Z. 1987-03-07T13:45:51.00 10.0 undecidable manual SG 169 0.0031 -0.38 0.8
--.ASS.Z. 1987-03-07T13:45:50.50 10.0 undecidable manual PG 307 0.0055 -0.57 1.8
--.CM8.Z. 1987-03-07T13:45:47.90 10.0 undecidable manual PG 345 0.0046 -1.43 0.7
--.AQU.Z. 1987-03-07T13:45:45.50 10.0 undecidable manual PG 169 0.0031 -0.25 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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