Earthquake with magnitude of Md 2.0 on date 14-09-1987 and time 20:12:16 (Italy) in region 2 km W Castelsantangelo sul Nera (MC)

A magnitude Md 2.0 earthquake occured in region: 2 km W Castelsantangelo sul Nera (MC), on

  • 14-09-1987 18:12:16 (UTC)
  • 14-09-1987 20:12:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9, 13.13 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
Castelsantangelo sul Nera MC 2 281 281
Ussita MC 5 444 725
Visso MC 5 1107 1832
Preci PG 8 724 2556
Norcia PG 13 4957 7513
Bolognola MC 13 142 7655
Acquacanina MC 15 121 7776
Monte Cavallo MC 15 145 7921
Fiastra MC 15 559 8480
Fiordimonte MC 15 202 8682
Montemonaco AP 16 604 9286
Sellano PG 17 1079 10365
Pieve Torina MC 17 1458 11823
Montefortino FM 18 1178 13001
Montegallo AP 18 523 13524
Pievebovigliana MC 18 866 14390
Arquata del Tronto AP 20 1178 15568
Cerreto di Spoleto PG 20 1075 16643

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km E of Foligno (57155 inhabitants)
54 Km NW of Teramo (54892 inhabitants)
55 Km NE of Terni (111501 inhabitants)
65 Km E of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
94 Km W of Montesilvano (53738 inhabitants)
100 Km NE of Viterbo (67173 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 2.0 1987-09-14
18:12:16
42.9 13.13 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 55269
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-09-14 18:12:16 ± 0.348
Latitude 42.90 ± 0.02
Longitude 13.13 ± 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 55269

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) 2713.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
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) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.0055
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 55269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:53:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-09-14T18:12:38.50 10.0 undecidable manual SG 346 0.0055 0.27 0.6
--.ASS.Z. 1987-09-14T18:12:31.50 10.0 undecidable manual SG 294 0.0035 0.5 0.5
--.ALP.Z. 1987-09-14T18:12:30.24 10.0 undecidable manual SG 110 0.003 0.74 0.5
--.ARV.Z. 1987-09-14T18:12:28.50 10.0 undecidable manual PG 346 0.0055 -0.62 1
--.CM8.Z. 1987-09-14T18:12:28.48 10.0 undecidable manual SG 1 0.0026 0.51 0.8
--.ASS.Z. 1987-09-14T18:12:25.00 10.0 undecidable manual PG 294 0.0035 0.05 2.3
--.ALP.Z. 1987-09-14T18:12:23.50 10.0 undecidable manual PG? 110 0.003 -1.03 0.2
--.CM8.Z. 1987-09-14T18:12:22.93 10.0 undecidable manual PG 1 0.0026 -0.27 2.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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