Magnitude 7.0 – NORTHERN PERU

A major magnitude 7.0 earthquake occurred in Northern Peru this afternoon.  At a depth of 145 km it shows minimal surface phases and because it is south of my location in northeastern Ohio the transverse S-phase arrival is strong.

The travel time information from the USGS Travel Time calculator is shown below:

  DATE-(UTC)-TIME    LAT    LON     DEPTH MAG   Q   COMMENTS
  2011/08/24 17:46:11   7.64S  74.51W 145.1 7.0      US: NORTHERN PERU
   Expected 1s period body wave amplitude     [  3.06E+00 µm]  [  1.92E+01 µm/s]

 delta   azimuth (degrees clockwise from north)
 (deg)      eq-to-station     station-to-eq
 48.44          352.5             170.2

                 travel   arrival time
    #  code      time(s)  dy hr mn sec
    1  P          507.44   0 17 54 38
    2  pP         540.38   0 17 55 11
    3  sP         556.85   0 17 55 27
    4  PcP        591.27   0 17 56  2
    5  PP         621.51   0 17 56 32
    6  PP         624.66   0 17 56 35
    7  ScP        812.11   0 17 59 43
    8  PcS        827.54   0 17 59 58
    9  S          917.67   0 18  1 28
   10  sS         975.47   0 18  2 26
   11  PKiKP     1000.78   0 18  2 51
   12  pPKiKP    1039.54   0 18  3 30
   13  sPKiKP    1054.61   0 18  3 45
   14  ScS       1084.90   0 18  4 15
   15  SS        1130.91   0 18  5  1
   16  SS        1142.47   0 18  5 13
   17  SKiKP     1199.19   0 18  6 10
   18  PKKPdf    1871.17   0 18 17 22
   19  SKKPdf    2069.62   0 18 20 40
   20  PKKSdf    2084.70   0 18 20 55
   21  SKKSdf    2283.03   0 18 24 14
   22  P'P'df    2374.35   0 18 25 45
   23  P'P'ab    2425.45   0 18 26 36
   24  S'S'df    3215.45   0 18 39 46
   25  LQ        1229.43   0 18  6 40
   26  LR        1364.50   0 18  8 55