Earthquake with magnitude of Md 2.5 on date 27-11-1987 and time 09:16:57 (UTC) in region 1 km E Sellano (PG)

A magnitude Md 2.5 earthquake occured in region: 1 km E Sellano (PG), on

  • 27-11-1987 09:16:57 (UTC)
  • 27-11-1987 10:16:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.89, 12.94 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 1 1079 1079
Cerreto di Spoleto PG 8 1075 2154
Preci PG 9 724 2878
Monte Cavallo MC 13 145 3023
Visso MC 13 1107 4130
Vallo di Nera PG 14 364 4494
Campello sul Clitunno PG 15 2442 6936
Trevi PG 15 8469 15405
Norcia PG 17 4957 20362
Ussita MC 18 444 20806
Castelsantangelo sul Nera MC 18 281 21087
Sant'Anatolia di Narco PG 19 564 21651
Poggiodomo PG 20 117 21768
Cascia PG 20 3217 24985
Pieve Torina MC 20 1458 26443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
51 Km E of Perugia (166134 inhabitants)
68 Km W of Teramo (54892 inhabitants)
71 Km NW of L'Aquila (69753 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
94 Km SW of Ancona (100861 inhabitants)
100 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 2.5
ML-VAX 2.1
1987-11-27
09:16:57
42.89 12.94 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 58919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-11-27 09:16:57 ± 0.357
Latitude 42.89 ± 0.01
Longitude 12.94 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 58919

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) 3330.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00243
Epicentral distance of station farthest from the epicenter (degree) 0.00542
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 58919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:56:21

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 58919
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. 1987-11-27T09:17:19.90 10.0 undecidable manual SG 0 0.0054 0.86 0.1
--.MNS.Z. 1987-11-27T09:17:17.25 10.0 undecidable manual SG 200 0.0048 0.61 0.3
--.ARV.Z. 1987-11-27T09:17:09.53 10.0 positive manual PG 0 0.0054 -0.41 2.3
--.ASS.Z. 1987-11-27T09:17:08.24 10.0 undecidable manual SG 310 0.0024 0.12 0.7
--.MNS.Z. 1987-11-27T09:17:07.88 10.0 undecidable manual PG 200 0.0048 -0.68 0.7
--.ASS.Z. 1987-11-27T09:17:03.61 10.0 undecidable manual PG 310 0.0024 -0.02 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download