Earthquake with magnitude of Md 2.0 on date 06-08-1987 and time 16:43:56 (Italy) in region 5 km W Montemonaco (AP)

A magnitude Md 2.0 earthquake occured in region: 5 km W Montemonaco (AP), on

  • 06-08-1987 14:43:56 (UTC)
  • 06-08-1987 16:43:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9, 13.27 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
Montemonaco AP 5 604 604
Montegallo AP 8 523 1127
Montefortino FM 8 1178 2305
Castelsantangelo sul Nera MC 9 281 2586
Bolognola MC 12 142 2728
Ussita MC 12 444 3172
Amandola FM 12 3629 6801
Arquata del Tronto AP 14 1178 7979
Comunanza AP 14 3166 11145
Visso MC 15 1107 12252
Palmiano AP 16 196 12448
Sarnano MC 16 3264 15712
Acquacanina MC 17 121 15833
Roccafluvione AP 17 2010 17843
Fiastra MC 18 559 18402
Acquasanta Terme AP 18 2916 21318
Norcia PG 18 4957 26275
Venarotta AP 19 2066 28341
Preci PG 19 724 29065
Montefalcone Appennino FM 19 424 29489
Smerillo FM 19 365 29854
Force AP 20 1354 31208
Gualdo MC 20 815 32023

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km NW of Teramo (54892 inhabitants)
46 Km E of Foligno (57155 inhabitants)
61 Km N of L'Aquila (69753 inhabitants)
63 Km NE of Terni (111501 inhabitants)
75 Km E of Perugia (166134 inhabitants)
83 Km S of Ancona (100861 inhabitants)
84 Km NW of Montesilvano (53738 inhabitants)
91 Km NW of Pescara (121014 inhabitants)
95 Km NW of Chieti (51815 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 1987-08-06
14:43:56
42.9 13.27 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 53459
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-06 14:43:56 ± 0.14
Latitude 42.90 ± 0.01
Longitude 13.27 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 53459

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) 1657.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
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) 0.00219
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 1
Type of magnitude Md
Reference to an origin 53459
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:51:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-08-06T14:44:19.00 10.0 undecidable manual SG 338 0.0057 0 0.7
--.ASS.Z. 1987-08-06T14:44:14.00 10.0 undecidable manual SG 290 0.0043 0.36 0.4
--.ARV.Z. 1987-08-06T14:44:10.00 10.0 undecidable manual PG 338 0.0057 0.58 0.4
--.CM8.Z. 1987-08-06T14:44:07.93 10.0 undecidable manual SG 343 0.0028 -0.32 0.8
--.ASS.Z. 1987-08-06T14:44:06.00 10.0 undecidable manual PG 290 0.0043 -0.32 1.2
--.ALP.Z. 1987-08-06T14:44:06.37 10.0 undecidable manual SG 117 0.0022 0.16 1.1
--.CM8.Z. 1987-08-06T14:44:02.98 10.0 undecidable manual PG 343 0.0028 -0.23 1.7
--.ALP.Z. 1987-08-06T14:44:01.81 10.0 undecidable manual PG 117 0.0022 -0.22 1.7
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