Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

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300 R. Muir Wood, G. Woo, and H. Bungumand historically 'opaquen listing of locations and intensities. From 1938 even theindividual intensity assignments were dropped as the events were indicated solelywith a map marked with a felt area boundary or isoseismals. The number of smallevents reported in this period also showed a marked decline. However, the datagathering, the posting of directed questionnaires, continued, and when in 1983Sellevoll, Almaas and Kijko finally caught up with the backlog of data from 1953-1975 they provided maps with individual intensity points noted, also marked withthe instrumentally located epicenters.3. Analysis of Macroseismic DataIn order to derive important seismological parameters from the record of historicalearthquakes, it is important that the data have been processed and mappedaccording to a uniform methodology. Intensity is a compound measure of the amplitude,spectral content and period of earthquake waves & a surface location.Intensity at a given site varies according to the properties of the geology, groundand resonant frequency of the building in which an observer is located. Thus assessmentsof intensity for different observers in the same village or town may varyby up to one intensity grade. The intensity scale utilized here is the standard EuropeanMSK scale, with some specific adaptations made for the circumstances ofNorwegian wooden houses.Intensity assessment cannot be divorced from the means by which the informationwas gathered. For example, solicited questionnaires placed in newspapers will tendto gain extreme value, rather than average observations, since correspondants willtend to be those with the most interesting effects to report. The subsequent isoseismalswill therefore also be of extreme value, including all the outermost locationswhere a given intensity grade was perceived. In contrast, the intensities within thispresent study have been plotted as modal community intensities using grid averages,taking into consideration the range of perceptions, including also informationas to where the earthquake was not felt. The individual intensity points have thenbeen contoured, and wherever possible the individual intensity assignments havebeen made from the primary data. However, where only intensity maps have beenpublished without individual intensity assignments (as between 1937 and 1953),these have been recontoured according to a comparison of both intensity scales andthe original method of contouring. An example of an important relocalization isgiven in Figure 1.The collection of isoseismal maps for felt earthquakes in the North Sea regionforms the basis for a quantitative analysis of macroseismic data. From historicalobservations of earthquakes, the essential seismological parameters of event locationand magnitude can be estimated even though no instrumental records may exist.The fact that this is possible is due mainly to the availability of 20th centurymacroseismic and instrumental data which allow earlier events to be quanti6ed viaa correlation procedure.The need for a correlation procedure to determine the epicenters of felt earthquakesis a consequence of the number of important offshore events in the region.For such events, the land intensity distribution is often inadequate to locate theepicenter geometrically with enough precision. As Figure 2 illustrates, there isa possible solution to this problem if another event can be found with a similarintensity distribution, and which has been instrumentally located. This event, if it
The History of Earthquakes in the Northern North Seaso1Figure 1. As a result of detailed researches of contemporary reports preserved in localnewspapers, the 1865/5/7 earthquake, considered in all previous catalogues as having anepicenter in the North Sea, has been shown to have been located onshore in Rogaland, tothe northeast of Stavanger.can be found, serves as a template to locate the epicenter of the earlier event, forwhich there is no instrumental record. For an event felt on both sides of the NorthSea, geometrical constraints may be sufficient in themselves to locate the epicenter,as demonstrated in Figure 3.Once an event has been located, its magnitude needs to be determined. In thepast the assignment of magnitude values to historical earthquakes in the region hasbeen a major stumbling block. This has been resolved with the establishment of acorrelation between surface wave magnitude (Ms) and felt area (AIII, AIV) withinthe outer isoseismals I11 and IV. This takes the form (Principia, 1985):
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Historical SeismogramsandEarthquake
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ToJames F. Landerfor his leadership
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viContentsThe Status, Importance, a
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...VlllEarthquake History of Califo
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XMicrofilming of Historical Seismog
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PrefaceA symposium on Historical Se
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I. Introduction
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4 W. H. K. Lee, H. Meyers, and K. S
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6 W. H. K. Lee, H. Meyers, and K. S
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8 W. H. h‘. Lee, H. Meyers, and K
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10 W. H. K. Lee, IT. Meyers, and K.
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12 W. H. K. Lee, H. Meyers, and K.
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14 W. H. K. Lee, H. Meyers, and K.
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IMPORTANCE OF HISTORICAL SEISMOGRAM
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18 Hiroo KanamoriTable Ib. Some Lar
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-60'1 1904-1985-M, >8.01II\I'.iPlus
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22 Hiroo Kanamorievents often have
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~~~24 Hiroo KanamoriThatcher et al.
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26 Hiroo Kanamo riIf relatively com
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28 Hiroo Kanamori9. Difficulties in
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30 Hiroo KanamoriNagamune, T. (1971
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32 Hiroo KanamoriI I I I I1000100z
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11. Analysis of Historical Seismogr
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38 Kat su y uki A beaddition to thi
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42 Katsuyuki Abe20:oow19:302-I--Ia
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44 Katsuyuki AbeIn the present stud
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46 Katsuyuki AbeTable 3. Sinkiang E
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~48 Katsuyuki AbeSieh (1978) and ot
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50 Katsuyuki AbeREFERENCESAbe, K. (
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52 E. Hurtig and G. KowalleFRG'.L.-
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54 E. Hurtig and G. Kowalle2.2 Reco
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56 E. Hurtig and G. KowalleREFERENC
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58 N. V. Kondorskaya and Yu. F. Kop
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THE STATUS, IMPORTANCE, AND USE OFH
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66 Ota Kulhdnek1 8 35lo. r 1s ' 20
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68 Ota Kulhdnek1 UPP EW SEP 9 1954
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ANALYSIS OF HISTORICAL SEISMOGRAMS
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72 S. K. Singhfrom Uppsala. We also
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74S. K. SinghN1 1Oaxaca-X .-x x- x
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76S. K. SinghESKUPPWIECHERT ELPZ A-
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78 S. K. SinghJdFJ-22 Feb 1943Ms=7.
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80 S. K. SinghDE BlLT (DBN) Z$I = 3
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82 S. K. Singh7. The Great Jalisco,
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84 S. K. SinghREFERENCESAbe, K. (19
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86 S. Stein, E. A. Okal and D. A. W
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94S. Stein, E. A. Okal and D. A. Wi
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96S. Stein, E. A. Okal and D. A. Wi
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100 S. Stein, E. A. Okal and D. A.
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RECENT ACTIVITIES AT THE INTERNATIO
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S.S. Felt and Damaging EarthquakesI
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In t e r na tio n a1 Se is mo logic
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1. IntroductionCatalogue of Chinese
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Catalogue of Chinese Earthquakes (M
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Catalogue of Chinese Earthquakes (A
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Catalogue of Chinese Earthquakes (A
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DATA BASES ON HISTORICAL SEISMICITY
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Data Bases on Historical Seismicity
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COMPILATION AND PROCESSING OF HISTO
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Compilation and Processing of Histo
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The U. S. Geological Survey’s Dat
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The U. S. Geological Survey's Datab
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~ ~The U. 5‘. Geological Survey
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The U. S. Geological Survey’s Dat
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Catalog of Large and Damaging Earth
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YCatalog of Large and Damaging Eart
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YM D h m1918 2 9 20 461918 2 13 6 7
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His to ric al Mate ria Is of Chine
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Historic a1 Mate rials of Chinese E
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Historical Materials of Chinere Ear
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His t o r ical Mate rials of Chin e
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IV. Individual Historical Earthquak
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174 N. N. Ambraseys and C. F. Finke
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182 N. N. Arnbraseys and C. P. Melv
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184 N. N. Ambraseys and C. P. Melvi
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188 N. N. Arnbraseys and C. P. Melv
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202G. E. Fiedler B.FI1 IFigure 1. T
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204 G. E. Fiedler B.Figure 3. The S
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206 G. E. Fiedler B.Origin time Epi
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EVALUATION OF DAMAGE AND SOURCE PAR
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2 10 D. Muiioz and A. Udias3. Evalu
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212 D. Muiioz and A. Udias3 wFigure
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2 14 D. Mun"oz and A. Udiasgiven by
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216 D. Muioz and A. UdiasTable 2. D
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218 D. Munot and A. UdiasGentil, P.
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220 D. Muiioz and A. UdiasArchivo M
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V. Earthquake History
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226 M. DeBecker and T. CamelbeeckAt
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~~228 M. DeBecker and T. Camelbeeck
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230 M. DeBecker and T. Camelbeeek10
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DOCUMENTING NEW ZEALAND EARTHQUAKES
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234 G. A. EabyFrom a seismic point
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236 G. A. EibyImmediate practical p
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238 G. A. Eibynorth-west; but subsi
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240 G. A. Eibywith near-earthquake
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242 Pao Hua Lee120 121 122 123Figur
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0.3244 Pao Hua Lee(3) Ryukyu-Taiwan
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Pa0 Hua LeeTable 2. Major Earthquak
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248 Pao Hua LeeTable 2. (Continued
Page 264 and 265: 250 Pao Hua Lee‘. . . an earthqua
Page 266 and 267: 252 Pao Hua LeeREFERENCESCentral We
Page 268 and 269: 254 S. Prac h ua b21I151 O0IFigure
Page 270 and 271: 256 S. PrachuabTable 1. 12 Seismic
Page 272 and 273: 258 S. Prac h u a bTable 2. (Contin
Page 274 and 275: 260S. Prachuab94" 96" 98" 1 ooo2ac2
Page 276 and 277: 262 S. Prachuab.17 MAY 1955EMrliCUA
Page 278 and 279: :;13264 S. Prachuab0 .me.0 . .eeee0
Page 280 and 281: 266 S. Prac hua b005 6 7MAGNITUDEFi
Page 282 and 283: 268 T. R. Toppozada, C. R. Real, an
Page 286 and 287: 2 72 T. R. Toppozada, C. R. Real, a
Page 290 and 291: STUDY OF HISTORICAL EARTHQUAKES IN
Page 292 and 293: 278 Tatsuo Usarni(3) Documents publ
Page 294 and 295: 280 Tatsuo Usarnin5nlob0D KyotoKama
Page 296 and 297: 282 Tatsuo Usami:.:.., ........ L,/
Page 298 and 299: 284 Tatsuo Usami(2) A tsunami attac
Page 300 and 301: 286 Tatsuo Usami1897lntenrLFigure 6
Page 302 and 303: ~ ~~~~288 Tatsuo UsamiTable 4. Occu
Page 304 and 305: 290 R. G. Valenzuela and L. C. Garc
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Page 308 and 309: ~ ~~294 R. G. Valenzuela and L. C.
Page 310 and 311: 296 R. G. Valenzuela and L. C. Garc
Page 312 and 313: 298 R. Muir Wood, G. Woo, and H. Bu
Page 323 and 324: MAGNITUDE-FAULT LENGTH RELATIONSHIP
Page 325 and 326: APPLICATIONS OF FUZZY MATHEMATICSIN
Page 327 and 328: Applications of Fuzzy Mathematics 3
Page 333 and 334: Applications of Fuzzy hluthematics
Page 335 and 336: ON THE SEISMICITY OF THE MIDDLEASTS
Page 337 and 338: uca,m a,kma,.IY kfi30 uhd
Page 339 and 340: On the Seismicity of the Middle Eas
Page 347 and 348: On the Seismicity oj the Middle Eas
Page 349 and 350: HISTORICAL SEISMICITY AND EARTHQUAK
Page 351 and 352: Historical Seismic it y and Earthqu
Page 353 and 354: fIistorica1 Seismicity and Earthquu
Page 355 and 356: Historical Seismicity and Earthquak
Page 363 and 364: PATTERN ANALYSIS OF SMALL EARTHQUAK
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Pattern Analysis of Small Earthquak
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Earthquakes and Deep Fracture Zones
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--_-Earthquakes and Deep Fracture Z
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HISTORICAL SEISMOGRAM FILMING PROJE
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~~Historical Seismogram Filming Pro
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Historical Seismogram Filming Proje
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Historical Seismogram Filming Proje
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Filming Seismograms and Related Mat
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Digitization and Processing of J.M.
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SOME REMARKS ON HISTORICAL SEISMOGR
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Historical Seismograms and the Micr
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~~~~Historical Seismograms and the
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His torical Se is mogru ms and the
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Historical Sezs mogra ms and the Ma
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H1s t o rical Seismograms a nd the
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Historical Seismograms in China 42
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424 Kezin Qua History of Chinese Se
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428 Kexin Qu8. Plans for the Near F
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430 0. Ye. Starovoita station, its
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DAT ANDTHE STANDARDIZATION OF SEISM
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434 Y. Tamura, H. Sasaki, M. Ooe, a
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~ So.i436 Y. Tarnura, H. Sasaki, M.
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438 Y. Tarnura, H. Sasaki, M. Ooe,
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440 Yasuhiro Umeda and Katsuyoshi I
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442 Yasuhiro Umeda and Katsuyoshi I
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HISTORICAL SEISMOGRAMS IN ITALYR. C
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Historical Seismograms in Italy 449
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HISTORICAL SEISMOGRAMS FROM AUSTRAL
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His to rical Se is mog ra ms From A
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SEISMOGRAMS MADE BEFORE 1963 AT STA
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2. New ZealandSeismograms Before 19
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Seismograms Before 1963 in the Sout
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Seismograms Before 1963 in the Sout
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Historical Seismograms Recorded in
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Hist orieal Se is mograms Reeo rded
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THE HISTORICAL SEISMOGRAMS OF COLOM
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The Historical Seismograms of Colom
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Helwan Historical Seismograms 475Al
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Se is mo log ic a1 Mea s use me n t
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Seismological Measurement an Hong K
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A BRIEF HISTORY OF THE SEISMOLOGICA
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History of the Seismological Observ
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~~ ~ ~ ~~ ~ ~~Historical Seismogram
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494 Sergio S. Su, S. J.Figure S. Se
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496 Sergao S. Su, S. J.Figure 7. Ce
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498 K. L. SuendsenDominican Republi
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INDEXAAbuyama Seismological Observa
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Index 503China, see also Taiwan466
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Indez505HIHalin seismograph, 421Haw
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Index 507Karuizawa, 417Kobe, 117, 1
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Index 509PPacific Ocean1943 Malpelo
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Index 511Sri Lanka, Colombo station
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Index 513Wood-Anderson seismographW
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