Earthquake with magnitude of Md 2.0 on date 06-08-1987 and time 03:20:57 (Italy) in region 6 km SE Sellano (PG)

A magnitude Md 2.0 earthquake occured in region: 6 km SE Sellano (PG), on

  • 06-08-1987 01:20:57 (UTC)
  • 06-08-1987 03:20:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.85, 12.98 at 10 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
Sellano PG 6 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 6 1075 2878
Norcia PG 12 4957 7835
Visso MC 13 1107 8942
Vallo di Nera PG 13 364 9306
Castelsantangelo sul Nera MC 15 281 9587
Cascia PG 15 3217 12804
Monte Cavallo MC 16 145 12949
Poggiodomo PG 16 117 13066
Campello sul Clitunno PG 17 2442 15508
Ussita MC 17 444 15952
Sant'Anatolia di Narco PG 18 564 16516
Trevi PG 19 8469 24985
Scheggino PG 20 461 25446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
55 Km SE of Perugia (166134 inhabitants)
63 Km W of Teramo (54892 inhabitants)
66 Km NW of L'Aquila (69753 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
96 Km SW of Ancona (100861 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
100 Km N 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
Bulletin
Rev1000
Md 2.0 1987-08-06
01:20:57
42.85 12.98 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 53439
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-06 01:20:57 ± 0.301
Latitude 42.85 ± 0.02
Longitude 12.98 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 53439

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) 2293.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 212
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.00575
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 53439
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:51:32
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-08-06T01:21:21.20 10.0 undecidable manual SG 357 0.0057 0.66 0.2
--.ALP.Z. 1987-08-06T01:21:13.48 10.0 undecidable manual SG 99 0.0039 -0.45 0.6
--.CM8.Z. 1987-08-06T01:21:11.67 10.0 undecidable manual SG 19 0.0032 0.21 1.1
--.ARV.Z. 1987-08-06T01:21:10.00 10.0 undecidable manual PG 357 0.0057 -0.97 0.3
--.ASS.Z. 1987-08-06T01:21:09.96 10.0 undecidable manual SG 311 0.0028 0.01 0.8
--.ALP.Z. 1987-08-06T01:21:07.56 10.0 undecidable manual PG 99 0.0039 0.4 1.3
--.CM8.Z. 1987-08-06T01:21:05.52 10.0 undecidable manual PG 19 0.0032 -0.21 1.9
--.ASS.Z. 1987-08-06T01:21:04.91 10.0 undecidable manual PG 311 0.0028 0.05 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download