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23A Compact Ultraviolet Spectrometer System (COMPUSS) for Monitoring Volcanic SO, Emission :Validation and Preliminary Observation.
Toshiya MORI, Jun-ichi HIRABAYASHI, Kohei KAZAHAYA, Takehiko MORI,Michiko OHWADA, Makoto MIYASHITA, Hideki IINO and Yasuhiro NAKAHORI+*/, -."G /01 2++- Z/¡¢£"¤3¥¦§4 9¨56 © ª«¬­+,+9yz {,**1  + |} , |~Ll : 708®99:ª+,1+,3¯°0±²³$0ix²³´µxi¶· ¬³¸¹º»¼xiiiii - ,**/ ! +--"#$%&'( )+3-**+,-./0123456&789:;9< = +.3>?@ABCDEFGH IJK;LMANOPQRST@U +0+    +21
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AMS Radiocarbon Dating of a Charcoal Fragment from the Irosin Ignimbrite, Sorsogon Province,
Southern Luzon, PhilippinesMa. Hannah T. MIRABUENO, Mitsuru OKUNO, Toshio NAKAMURA,Eduardo P. LAGUERTA, Christopher G. NEWHALL and Tetsuo KOBAYASHI

,.+VWXY Z,**1/ [\ 0 [] ,./D^_`'a ,.1 !"

No. */iii

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 -,-**   !"#$%& ,/Source Mechanisms of Harmonic Tremors at Sakurajima VolcanoTakeshi TAMEGURI, Sukir MARYANTO and Masato IGUCHI ,1-'()* + ,-./0123 ,-./04 56789:;< =>? ,2+@A BCDE F,**1  1 GH 2 GI ,2-JKLM9. ,2.
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 0 




Volcano-tectonic Earthquakes during the Stage of Magma Accumulation at the Aira Caldera, SouthernKyushu, Japan Sri HIDAYATI, Kazuhiro ISHIHARA and Masato IGUCHI ,23NO  : PQRS4 BCTU VWXY -++Z[ \]^_` ,**0 abcde,BCfghijklmnopq\ rstuv --/ !
,**1 wxy%z  -.+,**1 w{y%z  -.2"  # $%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -/+@A BCDE F,**1  3 GH +* GI  -/.
JKLM9. -//& :  /, | F + H 0 I }~* iiv

BULLETIN OF THE VOLCANOLOGICALSOCIETY OF JAPANVol. /, Contents
No. +Articles
Eruptive History of Ohachi Volcano, Kirishima Volcano Group, Southern Kyushu, JapanῌῌῌῌῌῌῌῌῌῌῌῌῌMasaaki TSUTSUI, Mitsuru OKUNO and Tetsuo KOBAYASHIῌ

+A ,.* Ma Widespread Tephra Associated with a Large-Scale Pyroclastic Flow from the Sengan
Geothermal Area, Northeast Japan Arc ῌῌῌῌTakehiko SUZUKI and Toshio NAKAYAMAῌ

,-Temporal-spatial variations of Plio-Pleistocene volcanic activity in the Ryohaku Mountains, central
Japan : evidences from K-Ar ages. ῌῌAtsushi TANASE, Teruki OIKAWA, Atusi NINOMIYA,Shintaro HAYASHI and Koji UMEDAῌ

-3LetterCrustal Deformation and Surface Temperature Distribution Observed by Remote-Sensing Techniques after the ,**, Izu-Torishima EruptionῌῌῌῌῌῌYutaka WADA, Tetsuya JITSUFUCHI, Hiroshi OHKURA and Motoo UKAWAῌ

0-

Scientiﬁc Communication
Timescales of magmatic evolution in crustal magma chambers constrained from U-series radioactive disequilibria : A brief reviewῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌTakeshi KURITANIῌ

1+Volcanic Activity in Japan, during November῍December, ,**0 ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ

13

Miscellaneous News ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ2+NewsNo. ,Articles
Fluorine and Chlorine Contents in the Products of the Large-Scale Pyroclastic Activity of Aira
Caldera ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌMinoru YOSHIDA and Mineharu OSHIMAῌ

23Letters
A Compact Ultraviolet Spectrometer System (COMPUSS) for Monitoring Volcanic SO, Emission :Validation and Preliminary Observation.
ῌῌῌῌῌῌToshiya MORI, Jun-ichi HIRABAYASHI, Kohei KAZAHAYA, Takehiko MORI,
Michiko OHWADA, Makoto MIYASHITA, Hideki IINO and Yasuhiro NAKAHORIῌ +*/Origin of a White Pumiceous Ash Layer in the Hakoarezawa Tunnel, Fuji Volcano, JapanῌῌῌῌῌῌῌῌῌῌῌῌῌAtsushi YASUDA, Takayuki KANEKO and Toshitsugu FUJIIῌ ++Geothermal Activity on the Flank of Sakurajima Volcano Inferred from Infrared Thermal Observation ῌῌῌῌῌῌῌῌῌῌῌῌAkihiko YOKOO, Masato IGUCHI and Kazuhiro ISHIHARAῌ +,+v
NewsVolcanic Activity in Japan, during January῍February, ,**1 ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ +,1Miscellaneous News ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ +,3Appendix : ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌiNo. -Articles
The ,**/ Activity and Products of Nakadake Crater, Aso Volcano, JapanῌῌῌῌῌῌῌῌῌῌYasuo MIYABUCHI, Shin-ichiro IKEBE and Kazunori WATANABEῌ

+--Dike Intrusion Model of the +3-* o# Ito Earthquake Swarm Estimated from Leveling DataῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌTakuya NISHIMURA and Makoto MURAKAMIῌ

+.3

Eruptive Style and its Temporal Variation through the +3+.ῌ+3+/ Eruption of Sakurajima Volcano,Southern Kyushu, JapanῌῌῌῌῌῌMaya YASUI, Masaki TAKAHASHI, Kazuhiro ISHIHARA and Daisuke MIKIῌ

+0+

Proceedings of the Society ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ +21
News
Volcanic Activity in Japan, during March῍April, ,**1ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ ,*.
Miscellaneous News ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ ,*0Information on ,**1 Fall Annual Meeting

No. .

ArticlesAeromagnetic Anomalies and a -D magnetic structure of Suwanose-jima IslandῌῌῌῌῌῌYoshio UEDA, Ken-ei ONODERA, Kouiti KUMAGAWA and Kaoru KOYAMAῌ

,++Review
Overview of Diverse Computer Simulations and their Potential Contribution to VolcanologyῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌYasuhiro ISHIMINEῌ

,,+Letter
AMS Radiocarbon Dating of a Charcoal Fragment from the Irosin Ignimbrite, Sorsogon Province,
Southern Luzon, PhilippinesῌῌῌῌῌῌῌῌῌῌῌῌMa. Hannah T. MIRABUENO, Mitsuru OKUNO, Toshio NAKAMURA,Eduardo P. LAGUERTA, Christopher G. NEWHALL and Tetsuo KOBAYASHIῌ

,.+News
Volcanic Activity in Japan, during May῍June, ,**1 ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ ,./Miscellaneous News ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ ,.1Japan Geoscience Union News No. */vi

No. /Articles
Eruptive History of Tokachi-dake Volcano during the Last -,-** Years, Central Hokkaido, JapanῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌShinya FUJIWARA,
Mitsuhiro NAKAGAWA, Setsuo HASEGAWA and Daisuke KOMATSUῌ ,/Source Mechanisms of Harmonic Tremors at Sakurajima VolcanoῌῌῌῌῌῌῌῌῌῌῌῌῌTakeshi TAMEGURI, Sukir MARYANTO and Masato IGUCHIῌ ,1Book Review
Book Review : Geothermal System of Volcano : Geothermal System of Kuju Volcano and Utilization of Volcanic Energy by Sachio EHARA ῌῌῌῌῌῌῌῌῌῌῌῌTsuneomi KAGIYAMAῌ ,2+News
Volcanic Activity in Japan, during July῍August, ,**1 ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ ,2Miscellaneous News ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ ,2.
Meeting Program of Cities on Volcanoes / Conference, Shimabara

No. 0Articles
Volcano-tectonic Earthquakes during the Stage of Magma Accumulation at the Aira Caldera,
Southern Kyushu, Japan ῌῌῌῌῌSri HIDAYATI, Kazuhiro ISHIHARA and Masato IGUCHIῌ ,23Stratigraphy and volcanic activities of Hijiori volcano, Northeastern Japan arc ῌῌIsoji MIYAGIῌ -++Letter
Quantitative Analysis of Geothermal Events at the Yoshioka Hot Spring, Aso Volcano, in ,**0ῌῌῌῌῌῌῌAkihiko TERADA, Yasuaki SUDO, Shin YOSHIKAWA and Hiroyuki INOUEῌ --/Titles of Papers Presented at the Meeting of the Society,**1 Spring Meetingῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ -.+,**1 Fall Meetingῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ -.2
Proceedings of the Society ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ -/+News
Volcanic Activity in Japan, during September῍October, ,**1 ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ -/.
Miscellaneous News ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌ -//Appendix ; Vol. /, (No. +ῌNo. 0) ContentsῌAuthor Index ῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌῌivii

ῑῐ῏῎ ῌAuthor Index῍ῌ   

FUJII, Toshitsugu ++-,   

FUJIWARA, Shinya ,/-/ 

HASEGAWA, Setsuo ,/-/

!

"#$HAYASHI, Shintaro -3

+%& '()*+HIDAYATI, Sri ,23*0, !

-HIRABAYASHI, Jun-ichi  +*/*

,

 . / 0IGUCHI, Masato+,+, ,1-*, ,23*

,, /, 0

1 23IINO, Hideki  +*/*

,4 5 -$

IKEBE, Shin-ichiro +--- 6 7 8INOUE, Hiroyuki --/0

9  : ;

ISHIHARA, Kazuhiro +,+, +0+, ,23*

,, -, 0

9 < = >ISHIMINE, Yasuhiro ,,+.

? @ A JITSUFUCHI, Tetsuya 0-+

B C D EKAGIYAMA, Tsuneomi ,2+/

F G H 8KANEKO, Takayuki ++-,

I J = ,

KAZAHAYA, Kohei  +*/*

,

K ! A

KOBAYASHI, Tetsuo+, ,.+*

+, .

K L M NKOMATSU, Daisuke ,/-

/

K CO

KOYAMA, Kaoru ,++.

P  > -KUMAGAWA, Kouiti ,++

.

Q R

KURITANI, Takeshi 1+

+

Eduardo P. LAGUERTALAGUERTA, Eduardo P. ,.+*.

Sukir MARYANTOMARYANTO, Sukir  ,1-*

/S T M U

MIKI, Daisuke +0+

-Ma. Hannah T. MIRABUENO MIRABUENO, Ma. Hannah T.,.+*.

V W X

-MIYABUCHI, Yasuo +--V Y Z [MIYAGI, Isoji -++0V \]MIYASHITA, Makoto  +*/*

,^_ `MORI, Takehiko  +*/*

,

^a b

MORI, Toshiya  +*/*

,c 6d+.3

-e  f ;NAKAGAWA, Mitsuhiro ,/-/

e g = ;

NAKAHORI,Yasuhiro  +*/*

,

e c a

NAKAMURA, Toshio ,.+*.

e C a h

NAKAYAMA, Toshio ,-+Christopher G. NEWHALL

NEWHALL, Christopher G. ,.+*.

ijVMURAKAMI, Makoto

kNINOMIYA, Atusi -3+l c m 

NISHIMURA, Takuya +.3-

M no

OHKURA, Hiroshi0-+

M:p q GOHWADA, Michiko +*/*,

r  s 3OIKAWA, Teruki -3+viii

 



OKUNO, Mitsuru +, ,.+*

+, .

ONODERA, Ken-ei ,++.



OSHIMA, Mineharu 23,   SUDO, Yasuaki --/0   

SUZUKI, Takehiko ,-+   

TAKAHASHI, Masaki +0+- 

TAMEGURI, Takeshi  ,1-*/   

TANASE, Atsushi -3+! TERADA, Akihiko --/0

" #  TSUTSUI, Masaaki ++

$% &UEDA, Yoshio ,++.

' ( ) *UKAWA, Motoo 0-+

+, -UMEDA, Koji -3+.

/WADA, Yutaka0-+

0 1 2 3WATANABE, Kazunori +--

-

45

YASUDA, Atsushi ++-,

4 # 6 7YASUI, Maya +0+-

8 9 : YOKOO, Akihiko +,+,

;<YOSHIDA, Minoru 23

,; (=YOSHIKAWA, Shin --/0