Earthquake with magnitude of Md 3.0 on date 03-08-1987 and time 01:12:45 (Italy) in region 5 km NW Acquasanta Terme (AP)

A magnitude Md 3.0 earthquake occured in region: 5 km NW Acquasanta Terme (AP), on

  • 02-08-1987 23:12:45 (UTC)
  • 03-08-1987 01:12:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8, 13.37 at 6 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
Acquasanta Terme AP 5 2916 2916
Montegallo AP 6 523 3439
Arquata del Tronto AP 6 1178 4617
Roccafluvione AP 12 2010 6627
Montemonaco AP 12 604 7231
Valle Castellana TE 13 977 8208
Palmiano AP 14 196 8404
Venarotta AP 14 2066 10470
Accumoli RI 15 667 11137
Montefortino FM 16 1178 12315
Rocca Santa Maria TE 18 537 12852
Ascoli Piceno AP 18 49407 62259
Comunanza AP 18 3166 65425
Amatrice RI 20 2657 68082

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km W of Teramo (54892 inhabitants)
50 Km N of L'Aquila (69753 inhabitants)
57 Km E of Foligno (57155 inhabitants)
64 Km E of Terni (111501 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
79 Km W of Pescara (121014 inhabitants)
82 Km NW of Chieti (51815 inhabitants)
87 Km E of Perugia (166134 inhabitants)
92 Km S of Ancona (100861 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 3.0
ML-VAX 2.5
1987-08-02
23:12:45
42.8 13.37 6 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 53279
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-08-02 23:12:45 ± 0.641
Latitude 42.80 ± 0.01
Longitude 13.37 ± 0.02
Depth (km) 6 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 53279

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) 2406.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.00397
Epicentral distance of station farthest from the epicenter (degree) 0.03432
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 13
Type of magnitude Md
Reference to an origin 53279
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:51:23

ML:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 8
Type of magnitude ML
Reference to an origin 53279
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
--.FOI.Z. 1987-08-02T23:14:26.30 10.0 undecidable manual SN 353 0.0343 -1.6 0.1
--.CTI.Z. 1987-08-02T23:14:17.92 10.0 undecidable manual SN 339 0.0312 -1.77 0.1
--.FOI.Z. 1987-08-02T23:13:43.81 10.0 undecidable manual PN 353 0.0343 -0.8 0.9
--.RBL.Z. 1987-08-02T23:13:41.51 10.0 undecidable manual PN 2 0.0328 -0.73 1
--.CTI.Z. 1987-08-02T23:13:39.63 10.0 undecidable manual PN 339 0.0312 -0.25 1.4
--.FG2.Z. 1987-08-02T23:13:37.60 10.0 undecidable manual SN 126 0.0149 0.54 0.7
--.PGD.Z. 1987-08-02T23:13:36.43 10.0 undecidable manual SN 312 0.0145 1 0.5
--.CRE.Z. 1987-08-02T23:13:29.35 10.0 undecidable manual SN 309 0.0118 0.84 0.6
--.TR9.Z. 1987-08-02T23:13:26.00 10.0 undecidable manual PN! 141 0.0201 3.14 0
--.BDI.Z. 1987-08-02T23:13:26.40 10.0 undecidable manual PN 303 0.0214 1.22 0.8
--.SDI.Z. 1987-08-02T23:13:23.85 10.0 undecidable manual SN 163 0.0102 -0.3 0.8
--.RMP.Z. 1987-08-02T23:13:22.45 10.0 undecidable manual SN 206 0.0099 -0.88 0.6
--.MSC.Z. 1987-08-02T23:13:17.70 10.0 undecidable manual PN! 164 0.015 2.61 0
--.PGD.Z. 1987-08-02T23:13:15.80 10.0 undecidable manual PN 312 0.0145 1.48 0.6
--.SGG.Z. 1987-08-02T23:13:15.80 10.0 undecidable manual PN 151 0.0143 1.66 0.5
--.FG2.Z. 1987-08-02T23:13:15.81 10.0 undecidable manual PN 126 0.0149 0.86 1.4
--.MAO.Z. 1987-08-02T23:13:14.83 10.0 undecidable manual PN 257 0.015 -0.34 2.1
--.ARV.Z. 1987-08-02T23:13:12.85 10.0 undecidable manual SG 336 0.0069 0.03 0.9
--.DUI.Z. 1987-08-02T23:13:12.10 10.0 undecidable manual PN 144 0.0125 0.63 1.8
--.CRE.Z. 1987-08-02T23:13:11.71 10.0 undecidable manual PN 309 0.0118 1.38 0.7
--.MNS.Z. 1987-08-02T23:13:09.00 10.0 undecidable manual SG 231 0.0058 -0.16 0.9
--.PRO.Z. 1987-08-02T23:13:08.10 10.0 undecidable manual PN 342 0.0105 -0.25 2.2
--.ASS.Z. 1987-08-02T23:13:07.48 10.0 undecidable manual SG 297 0.0053 0.42 0.8
--.RMP.Z. 1987-08-02T23:13:07.52 10.0 undecidable manual PN 206 0.0099 0.18 2.2
--.SDI.Z. 1987-08-02T23:13:06.32 10.0 undecidable manual PN 163 0.0102 -1.49 0.6
--.AQU.Z. 1987-08-02T23:13:01.50 10.0 undecidable manual SG 176 0.004 -0.98 0.5
--.ARV.Z. 1987-08-02T23:13:00.64 10.0 undecidable manual PG 336 0.0069 -0.63 1.8
--.MNS.Z. 1987-08-02T23:12:58.57 10.0 undecidable manual PG 231 0.0058 -0.59 1.8
--.ASS.Z. 1987-08-02T23:12:57.44 10.0 undecidable manual PG 297 0.0053 -0.5 1.9
--.AQU.Z. 1987-08-02T23:12:54.65 10.0 undecidable manual PG 176 0.004 -0.65 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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