The Hawaiian gazette., 1912-10-22


,urveyor the writer is able to give the
times of occurrence of these shocks to
the second in Hawaiian standard time,
but with the reservation that, as the
rate of the chronometer is subject to
change with temperature, the values
given are not checked sufficiently for
seismometric correlations.
very feeble shock, not felt, was
registered beginning at 9:27:36 pm.
HIST. on October II. The distance of
its origin could not be estimated &C.
curately but the focus was very near,
possibly within the active cistern of
the Volcano. It may have been no more
than a strong group of the continually
occurring ''volcanic tremors,'' which
are really earthquake motions of unus-
uallv feeble energy and of uncommon
duration, n practically unending series
of rapid. feeble impulses differing from
the stronger impulses in genesis,
strength and interval only. As record
ed seismographically the motion lasted
for about As seconds
On the 18th of October from about
SOB am. to 5:22 am. HIST. feeble,
irregular waves of moderate period
were registered, very greatly interfer-
ed with by FRACTIONAL resistance in the
working of seismograph. 1t is likely
that this motion was the feeble ex-
preston of the chief phase of distant
shock. If so the origin was at a mod
crate, rather than great, distance.
On the 10Th of October very feeble,
local shock was registered beginning at
/ 10:30:3S am. HIST. 1t was far too
feeble to be felt. The distance of its
origin cannot be estimated.
Shook the Territory.
Early in the morning of the 18th of
October an earthquake was distinctly
felt at the Volcano House by several
persons, including the writer. The mo-
ton communicated to the second story
of the hotel was gentle and relatively
slow, yet sufficiently strong to waken
light sleepers. This was multiple
| shock, eight distinct maxima being
| counted by Mr.. l.. A. Thurston at the
! Volcano House. 1t is doubtful if this
could be due to a peculiar response in
the swaying of the structure. Owing to
an unaccountable stopping of the driv-
ing clock of the major trOnometer this
shock was not registered properly, and
/ the time of its occurrence or its du-
ration were not measurable. The maxi
mum amount of its motion indicates
that it was a shock of only moderate
strength. Approximately its time of oc.
currence was about quarter to six in the
morning. 1t has been reported that this
shock was felt lightly in Honolulu and
distinctly in Hilo. Whence the writer
concludes, since the area of sensible
motion was fairly large and the motion
nowhere strong on land, that this was
submarine shock, of fairly deep orr.
gin and relatively slight energy. The
! geographical position of the origin can.
not be estimated.
Throughout the forenoon or October
IS the pendulum of the major trono.
meter swung irregularly with long per
: iod indicating relatively rapid and ir,
regular movements of fitting at the
( edge of the Kilauea sink at this time
These movements were superposed upon
the normal diurnal fitting.
A distinctly registered shock, yet toe
weak to be felt, was registered al
4:03:54 pm. HIST. on October 10. vi
bration was measurable for one minute
and seven seconds.
A very weak shock was registered for
at 6:4S:36 am. HIST. on October IA.
A swarm of eight earthquakes in ra,
pid succession occurred at the times
given below:
October IA, at 11:3s;53 pm. II. ST.
A very feeble shock. October Is, I:2O:
33 am, II. S. livery feeble but de,
fnitely shock. October IS, 1897
am, H.S.T~A well-marked shock but
feeble. October IS, 4:42:00 am, HIST.
Fairly strongly but not reported as
felt; started the ordinary seismograpb
October 10, '5:06,34 am, H.S.T.-Very
feeble, possibly a group of volcanic
tremors. October Is, 6:02:52 am
Feeble but definitely a shock. October
10, 6:34:39 a.m.-Very feeble, possibly
volcanic tremors. October IS, 1908 :0a
a-m.--Very feeble, possibly volcanic
tremors.
These shocks were all local in char.
acter and two of them approached OF
reached an intensity great enough to be
pereeptible by the senses, though none
have been reported felt. In the present
state of knowledge their place of origin
/ cannot be estimated from the data OF
registration. Very respectfully,
II. O. WOOD, Associate.