The Hawaiian gazette., 1912-10-22
MANY SHOCKS
At THE VOLCANO
instruments Record Series of
Minor Quakes Through All
of Last Week.
(FrOm Monday Advertiser)

(From Monday Adversely
ga swarm of earthquakes" were rec
orded during the past eight days by
the seismographic Instruments at the
Technology Station, Kilauea, accord
ing to the official bulletin received by
The Advertiser yesterday from II. o.
Wood, the associate of Professor Jag
gar at the station. None of the shocks
were at all strong, the one most notice
able being recorded on the morning
of Sunday, the thirteenth, which same
shock was felt in Honolulu and
throughout the group.
The lava level in Halemaumau is
gradually rising, but there has been
no marked display of activity. The
official record says:
TECHNOLOGY STATION, October
II, l912.-Conditions at the pit of Ha-
lemaumau have undergone little change
in the past week with no noticeable
change in behavior The fumes, though
growing thinner, are still escaping in
quantity sufficient to veil all the lower
part of the pit completely except at
rare intervals. Only in the night can
an occasional good view be obtained
4 OF late all surveying has been conduct
ed at night and is subject to errors
of reading due to trying conditions of
light, uncertain settings, etc. Last
week, on the basis of an earlier trian-
gulatiOn made at night, measured de-
preston angles gave the depth of the
Old Faithful orifee in the frozen floor
over the lava lake as 475 feet below
the eastern rim. During the present
week re-triangulation has been made
by day fixing the relative positions of
the n, NE, + and Sc stations. As
result the position of the Sc sta
ton was found to be slightly in error
in the former triaRgulation, which had
been made by night using a bright
light signal because at that time dur
ing the day the heavy, outflow of fumes
interfered with sights between stations.
This error affected the value of the
depth measure of 475 feet, reducing
this value by an unknown amount. On
the evening of October 16 a measure
ment was made which gave the depth
of the Old Faithful Orifice as 1863 feet.
This measure was made on the basis
of the revised triangulation, was check
ed, and hence is considered reliable.
Slow Rise in Lava.
There is evidence pointing to a slow
rise of the summit of the lava column
Turing the week past. Flows have been
observed pouring from the minute orr.
ices in the CONCEALED floor over the
AXE thus building up its surface to a
higher level Whether any action of
lp-foating of the crust has accom-
panied this action it is impossible to
say. Hence the measure of week ago,
t75 feet, though unquestionably too
great, represents a somewhat greater
lepth than the present reliable depth
measure of 1863 feet. Comparison of
he two sets of pth-angles, which
IRE not affected by any fault in 'trian-
sulation, confirms this and indicates
hat the rise of the past week has been
'nly slight, but owing TO changes in
he confguration of the Old Faithful
'rifice an exact determination of the
mount by which the 475-foot measure
> in error is impossible.
Night Flarings
The appearance of the lower part Of
he pit remains unchanged except ia
linute details. The solidifed surface
the lake is a rugged uneven floor
nth numerous very small orifiees in it
through which the glowing lava can
Q seen at night. All these orifces are
mall. 1t is difficult TO estimate their
mensions. Two or three, larger than
ne rest, are very irregular in conhgura-
on. One of these is Old Faithful
Fhich continues to eject rockets or
>untains Of lava at irregular intervals,
reducing at night bright fiaring H.
animation of the swirlng fumes.
he escape of gas is now productive OF
continuous harsh. strong kissing, like
le escape of steam from a safety
Awe, which varies rhythmically in in.
nsity. On Saturday, October 10, the
'ening glow was strong with brilliant
airing Visitors report flows cascad'
h from west 70 east from the higher
rt of the floor 10 the lower
Again on sunday, October l8, visitors
ported flows from the higher western
wells, one Of which poured into the Old
ithfnl Orihee whence, simultaneously,
asses Of lava we're epnrted out spas
odleally az intervals, 40 other Times
ring the weeh The evening glow has
en- faint mud tle activity ~ fRT IN
OWL hos hrfn confined 10 the Fp0-
az lein from Oh Faithful, OhsaTla.
ln ~ ihe pii side hy lay 10 almost
iolly without result.
Many Earthquakes,
heismieallY ihe eerk Doc hfru oue VI
ilifd activity, ih0nph m0b NJ che
uhqRakeg apuld hRir fsfapd upilfe
rfpi ihipunh rfHlHiulinn hlfhf mnff
Hie ifpe of rplHmpRrHpb VIII hl
fipl 90 neipiw iNinf \ iaiFa fhfnn