Earthquake with magnitude of Md 2.4 on date 28-11-1987 and time 14:52:28 (UTC) in region 4 km SE Sellano (PG)

A magnitude Md 2.4 earthquake occured in region: 4 km SE Sellano (PG), on

  • 28-11-1987 14:52:28 (UTC)
  • 28-11-1987 15:52:28 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.87, 12.96 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
Sellano PG 4 1079 1079
Preci PG 6 724 1803
Cerreto di Spoleto PG 7 1075 2878
Visso MC 12 1107 3985
Norcia PG 14 4957 8942
Vallo di Nera PG 14 364 9306
Monte Cavallo MC 14 145 9451
Castelsantangelo sul Nera MC 16 281 9732
Campello sul Clitunno PG 16 2442 12174
Ussita MC 17 444 12618
Cascia PG 17 3217 15835
Trevi PG 18 8469 24304
Poggiodomo PG 18 117 24421
Sant'Anatolia di Narco PG 18 564 24985

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km E of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
54 Km E of Perugia (166134 inhabitants)
65 Km W of Teramo (54892 inhabitants)
68 Km NW of L'Aquila (69753 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
99 Km N of Guidonia Montecelio (88673 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 2.4
ML-VAX 1.8
1987-11-28
14:52:28
42.87 12.96 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 58959
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-11-28 14:52:28 ± 0.116
Latitude 42.87 ± 0.01
Longitude 12.96 ± 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 58959

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) 990.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.00559
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 58959
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:56:22

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 58959
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
--.ARV.Z. 1987-11-28T14:52:51.33 10.0 undecidable manual SG 358 0.0056 0.16 0.4
--.MNS.Z. 1987-11-28T14:52:48.58 10.0 undecidable manual SG 202 0.0047 0.57 0.1
--.ALP.Z. 1987-11-28T14:52:45.93 10.0 undecidable manual SG 101 0.004 0.37 0.4
--.CM8.Z. 1987-11-28T14:52:42.00 10.0 undecidable manual SG 21 0.0031 0.27 0.6
--.ARV.Z. 1987-11-28T14:52:40.94 10.0 positive manual PG 358 0.0056 -0.51 0.6
--.ASS.Z. 1987-11-28T14:52:39.64 10.0 undecidable manual SG 309 0.0026 -0.08 0.6
--.MNS.Z. 1987-11-28T14:52:39.49 10.0 undecidable manual PG 202 0.0047 -0.13 1.2
--.ALP.Z. 1987-11-28T14:52:38.20 10.0 undecidable manual PG 101 0.004 -0.19 2.4
--.CM8.Z. 1987-11-28T14:52:36.20 10.0 positive manual PG 21 0.0031 0.2 2.4
--.ASS.Z. 1987-11-28T14:52:34.99 10.0 undecidable manual PG 309 0.0026 0.15 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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