/Users/andrea/_magisterarbeit/korpus/clean/testkorpus/27/file15.html NNS ----------------------------------------- : Latest JJS Quakes NNS EQ NP Facts NNS Lists VVZ Hazards NNS Preparedness NN For IN Kids NPS Only RB Regional NP Websites NP Science NP Technology NP HOME NP ABOUT IN US NP EQ NP GLOSSARY NN FOR IN TEACHERS NNS PRODUCTS NNS SERVICES NNS DID VVD YOU PP FEEL VVP IT PP . SENT FAQ JJ SEARCH NN Earthquake NN Activity NN Current JJ Earthquakes NNS Maps NNS USA NP . SENT M NP 1 CD World NP . SENT M NP 2 CD . SENT 5 CD 4 CD Lists NNS USA NP . SENT M NP 1 CD , , M NP 3 CD World NP . SENT M NP 2 CD . SENT 5 CD 4 CD , , M NP 5 CD , , Last JJ 8 CD 30 CD Days NNS RSS NP 2 CD . SENT 0 CD RSS NP Instructions NNS Info NP ShakeMaps NP Seismogram NP Displays VVZ Earthquake NP Data NP Past NP Historical JJ Earthquakes NNS Earthquake NN Notification NN E NN mail NN Large JJ Significant JJ Earthquakes NNS This DT Year NN Significant JJ Earthquake NN Posters NNS Fast JJ Moment NP Tensor NN Solutions NNS Latest JJS Energy NP Broadband NP Solutions NNS Region NN Maps NNS Africa NP Asia NP Australia NP Europe NP North NP America NP North NP Pole NP South NP America NP South NP Pacific NP South NP Pole NP Hemisphere NP Maps NNS West NP East NP North NP South NP Other JJ Maps NNS Guam NP Hawaii NP World NP Mercator NP Animations NNS Data NP Sources NNS FAQ NP About IN These DT Maps NNS Network NP Contacts NNS Recent JJ Earthquakes NNS Frequently RB Asked VVD Questions NNS FAQ NP The DT Recent JJ Earthquake NN information NN system NN was VBD developed VVN through IN a DT long JJ process NN that WDT included VVD input NN from IN seismologists NNS , , graphic JJ artists NNS , , and CC users NNS . SENT Our PP$ goal NN is VBZ to TO provide VV users NNS with IN as IN much JJ information NN as IN possible JJ in IN a DT timely JJ fashion NN . SENT Because IN the DT number NN of IN users NNS continues VVZ to TO grow VV , , we PP have VHP been VBN forced VVN to TO make VV some DT design NN choices NNS to TO maximize VV the DT number NN of IN users NNS getting VVG information NN over IN the DT web NN , , especially RB after IN felt VVN earthquakes NNS . SENT We PP consider VVP this DT system NN a DT major JJ step NN forward RB for IN the DT following VVG reasons NNS . SENT It PP currently RB combines VVZ data NNS from IN Advanced NP National NP Seismic JJ System NP ANSS NP seismograph NN networks NNS from IN around IN the DT country NN . SENT It PP is VBZ mirrored VVD on IN multiple JJ sites NNS for IN robust JJ service NN during IN earthquake NN sequences NNS and CC network NN problems NNS . SENT It PP offers VVZ complete JJ coverage NN with IN no DT gaps NNS because IN of IN an DT overlapping JJ system NN of IN maps NNS . SENT It PP provides VVZ text NN information NN on IN each DT earthquake NN and CC auxiliary JJ information NN on IN some DT of IN them PP . SENT To TO meet VV our PP$ goal NN , , we PP had VHD to TO make VV many JJ decisions NNS and CC compromises NNS . SENT We PP realize VVP that IN not RB everyone NN will MD agree VV with IN our PP$ decisions NNS but CC we PP do VVP hope NN that IN you PP will MD read VV this DT file NN and CC consider VV why WRB we PP made VVD them PP . SENT If IN you PP have VHP comments NNS or CC suggestions NNS please VVP send VV them PP to TO Web NP Team NP . SENT We PP look VVP forward RB to TO hearing NN from IN you PP and CC hope VVP you PP will MD find VV the DT Recent JJ Earthquake NN system NN useful JJ . SENT How WRB do VVP I PP find VVP what WP I PP want VVP . SENT What WP pages NNS should MD I PP bookmark NN . SENT Why WRB are VBP squares NNS used VVN for IN the DT earthquakes NNS . SENT How WRB were VBD the DT symbol NN sizes NNS chosen VVN . SENT How WRB were VBD the DT colors NNS chosen VVN . SENT Why WRB don't JJ the DT maps NNS show VVP topography NN . SENT What WP does VVZ last JJ hour NN , , last JJ day NN and CC last JJ week NN mean NN . SENT How WRB do VVP the DT earthquakes NNS get VVP here RB . SENT Why WRB do VVP some DT earthquakes NNS disappear VVP . SENT Why WRB isn't JJ the DT distance NN to TO the DT nearest JJS fault NN provided VVD . SENT How WRB did VVD you PP decide VV which WDT places NNS to TO use VV for IN computing VVG the DT distance NN to TO individual JJ earthquakes NNS . SENT How WRB did VVD you PP decide VV which WDT places NNS toplot NN on IN the DT maps NNS . SENT How WRB do VVP I PP find VVP what WP I PP want VVP . SENT NOTE NN . SENT Our PP$ information NN changes NNS with IN time NN . SENT Sometimes RB when WRB you PP look VVP at IN a DT page NN your PP$ browser NN will MD show VV you PP an DT old JJ copy NN that IN it PP has VHZ cached VVN . SENT Check VV the DT time NN on IN the DT page NN and CC in IN the DT map NN . SENT If IN it PP was VBD produced VVN over IN an DT hour NN ago RB , , or CC if IN you PP think VVP something NN has VHZ happened VVN since IN it PP was VBD produced VVN , , then RB use VV the DT reload NN feature NN of IN your PP$ browser NN to TO get VV a DT new JJ version NN of IN the DT file NN . SENT To TO navigate VV through IN these DT maps NNS you PP should MD start VV at IN the DT USA NP map NN . SENT Once RB you PP have VHP looked VVN at IN the DT USA NP map NN click NN on IN an DT area NN to TO zoom VV in IN . SENT Or CC you PP can MD select VV the DT list NN of IN earthquakes NNS below IN the DT map NN . SENT If IN you PP click NN on IN the DT USA NP map NN and CC zoom VV in IN you PP can MD get VV more JJR information NN on IN any DT earthquake NN by IN either RB clicking VVG on IN its PP$ map NN symbol NN or CC by IN clicking VVG on IN its PP$ summary NN information NN presented VVN in IN the DT list NN of IN earthquakes NNS . SENT Or CC , , to TO move VV to TO an DT adjacent JJ map NN you PP can MD click NN on IN one CD of IN the DT blue JJ arrows NNS near IN the DT edges NNS of IN the DT map NN . SENT If IN you PP click NN on IN an DT earthquake NN either CC on IN a DT map NN or CC in IN a DT list NN and CC get VV a DT page NN of IN detailed JJ information NN you PP should MD look VV at IN the DT bottom NN of IN this DT page NN for IN auxiliary JJ information NN . SENT At IN any DT time NN you PP can MD use VV your PP$ back JJ button NN to TO return VV to TO a DT previous JJ page NN , , but CC always RB remember VV the DT note NN above IN about RB reloading VVG if IN a DT page NN seems VVZ old JJ . SENT Return NN to TO top VV of IN faq NP What WP pages NNS should MD I PP bookmark NN . SENT You PP may MD want VV to TO bookmark NN the DT USA NP map NN as RB well RB as IN more JJR detailed JJ maps NNS for IN the DT area NN where WRB you PP live VVP and CC work VVP and CC others NNS that IN you PP find VVP interesting JJ . SENT This DT may MD help VV you PP get VV fast JJ access NN after IN significant JJ earthquakes NNS when WRB many JJ people NNS are VBP trying VVG to TO use VV the DT Recent JJ Earthquakes NNS system NN . SENT Return NN to TO top VV of IN faq NN Why WRB are VBP squares NNS used VVN for IN the DT earthquakes NNS . SENT Some DT users NNS prefer VVP to TO see VV earthquakes NNS drawn VVN as IN circles NNS . SENT We PP have VHP chosen VVN to TO use VV squares NNS because IN computer NN screens NNS are VBP based VVN on IN a DT square JJ grid NN of IN dots NNS or CC rasters NNS . SENT This DT makes VVZ it PP easier JJR to TO draw VV a DT clear JJ square NN than IN a DT circle NN . SENT To TO draw VV a DT good JJ looking VVG circle NN requires VVZ a DT technique NN called VVD anti JJ aliasing NN , , however RB this DT introduces VVZ shades NNS of IN grey NN into IN the DT image NN which WDT makes VVZ the DT map NN files VVZ larger JJR and CC slower JJR to TO transfer VV . SENT We PP agree VVP that DT circles NNS are VBP prettier JJR than IN squares NNS , , and CC we PP anticipate VVP that IN as IN software NN and CC hardware NN get VVP better RBR and CC faster RBR , , it PP will MD be VB more RBR feasible JJ to TO use VV circles NNS . SENT Right RB now RB we PP have VHP opted VVN for IN the DT simplicity NN and CC visual JJ clarity NN of IN squares NNS . SENT Return NN to TO top VV of IN faq NP How WRB were VBD the DT symbol NN sizes NNS chosen VVN . SENT Some DT users NNS have VHP noted VVN that IN the DT magnitude NN 1 CD , , 2 CD , , and CC 3 CD earthquakes NNS are VBP drawn VVN with IN fairly RB small JJ symbols NNS . SENT This DT was VBD done VVN because IN after IN a DT large JJ earthquake NN there EX will MD be VB many JJ small JJ aftershocks NNS . SENT If IN the DT aftershocks NNS have VHP large JJ symbols NNS they PP may MD obscure VV the DT mainshock NN on IN the DT map NN . SENT To TO help VV prevent VV this DT we PP have VHP made VVN the DT small JJ earthquakes NNS have VHP small JJ symbols NNS . SENT Return NN to TO top VV of IN faq NP How WRB were VBD the DT colors NNS chosen VVN . SENT Our PP$ goal NN was VBD to TO highlight VV the DT earthquakes NNS while IN also RB showing VVG background NN information NN such JJ as IN faults NNS , , roads NNS , , towns NNS , , and CC bodies NNS of IN water NN . SENT We PP limited VVD our PP$ color NN choices NNS by IN selecting VVG from IN the DT approximately RB 200 CD browser NN safe JJ colors NNS that WDT are VBP consistently RB displayed VVN without IN dithering VVG by IN a DT variety NN of IN web NN browsers NNS . SENT We PP also RB attempted VVD to TO select VV colors NNS that WDT could MD be VB easily RB distinguished VVN by IN users NNS with IN red JJ green JJ color NN blindness NN . SENT Return NN to TO top VV of IN faq NP Why WRB don't JJ the DT maps NNS show VVP topography NN . SENT Some DT of IN our PP$ older JJR earthquake NN maps NNS showed VVD topography NN in IN the DT background NN as IN either CC a DT range NN of IN colors NNS or CC shades NNS of IN gray JJ . SENT Unfortunately RB , , this DT popular JJ feature NN makes VVZ the DT map NN files VVZ about IN three CD times NNS larger JJR . SENT These DT larger JJR files NNS take VV longer RBR to TO transfer VV and CC at IN times NNS of IN heavy JJ usage NN can MD prevent VV us PP from IN serving VVG many JJ of IN those DT who WP want VVP the DT earthquake NN information NN . SENT While IN we PP would MD like VV to TO show VV the DT topography NN , , we PP have VHP concluded VVN that IN it PP is VBZ more RBR important JJ to TO provide VV fast JJ access NN to TO the DT earthquake NN data NNS to TO as RB many JJ people NNS as IN possible JJ . SENT Return NN to TO top VV of IN faq NP What WP does VVZ last JJ hour NN , , last JJ day NN and CC last JJ week NN mean NN . SENT Each DT map NN shows VVZ the DT time NN it PP was VBD created VVN . SENT The DT phrases NNS last JJ hour NN , , last JJ day NN , , and CC last JJ week NN are VBP with IN respect NN to TO that DT time NN . SENT Any DT earthquakes NNS that WDT occurred VVD within IN one CD hour NN of IN the DT creation NN time NN are VBP in IN the DT last JJ hour NN and CC are VBP colored VVN red JJ . SENT Those DT that WDT occurred VVD between IN 1 CD and CC 24 CD hours NNS before IN the DT map NN was VBD created VVN are VBP in IN the DT last JJ day NN and CC are VBP colored VVN blue JJ . SENT Those DT that WDT occurred VVD between IN 24 CD hours NNS and CC 7 CD days NNS 168 CD hours NNS before IN the DT map NN was VBD drawn VVN are VBP in IN the DT last JJ week NN and CC are VBP colored VVN yellow JJ . SENT Return NN to TO top VV of IN faq NP How WRB do VV the DT earthquakes NNS get VVP here RB . SENT Another DT page NN describes VVZ how WRB the DT earthquake NN information NN gets VVZ onto IN the DT web NN server NN . SENT Return NN to TO top VV of IN faq NP Why WRB do VV some DT earthquakes NNS disappear VVP . SENT The DT earthquake NN data NNS shown VVN here RB is VBZ automatically RB generated VVN and CC despite IN our PP$ best JJS efforts NNS some DT glitches NNS will MD create VV bogus JJ earthquakes NNS . SENT When WRB we PP find VVP a DT bogus JJ event NN , , usually RB by IN studying VVG the DT seismograms NNS , , we PP delete VV it PP and CC careful JJ observers NNS may MD notice VV that IN an DT earthquake NN has VHZ disappeared VVN . SENT This DT often RB happens VVZ after IN a DT large JJ earthquake NN when WRB our PP$ systems NNS don't NN realize VVP that IN all DT of IN the DT seismograms NNS were VBD created VVN by IN a DT single JJ event NN . SENT In IN this DT case NN , , one CD earthquake NN will MD turn VV into IN multiple JJ events NNS on IN the DT maps NNS . SENT In IN other JJ cases NNS problems NNS in IN our PP$ telemetry NN systems NNS that WDT bring VVP the DT data NNS from IN our PP$ seismometers NNS to TO our PP$ computers NNS create VVP glitches NNS that WDT also RB can MD create VV bogus JJ events NNS . SENT For IN these DT reasons NNS it PP is VBZ very RB important JJ to TO remember VV that IN this DT data NN is VBZ preliminary JJ and CC when WRB events NNS disappear VVP they PP weren't NN real JJ to TO begin VV with IN . SENT Return NN to TO top VV of IN faq NP Why WRB isn't JJ the DT distance NN to TO the DT nearest JJS fault NN provided VVD . SENT Seismologists NNS evaluate VVP the DT hypocenter JJR location NN and CC the DT focal JJ mechanism NN of IN an DT earthquake NN to TO decide VV if IN the DT earthquake NN occurs VVZ on IN a DT named VVN fault NN . SENT Research NN shows NNS that IN many JJ earthquakes NNS occur VVP on IN small JJ , , un NP named VVD faults NNS located VVN near IN well RB known VVN faults NNS . SENT For IN example NN , , most JJS of IN the DT aftershocks NNS of IN the DT 1989 CD M NP 6 CD . SENT 9 CD Loma NP Prieta NP earthquake NN occurred VVD on IN small JJ , , subsidiary NN faults NNS within IN a DT few JJ hundred CD meters NNS of IN the DT mainshock NN rupture NN plane NN . SENT On IN other JJ fault NN segments NNS like IN the DT San NP Andreas NP fault NN near IN Parkfield NP , , most JJS of IN the DT earthquakes NNS occur VVP on IN the DT San NP Andreas NP fault NN . SENT It PP is VBZ difficult JJ to TO automate VV this DT decision NN process NN , , and CC it PP would MD be VB misleading JJ to TO imply VV on IN the DT basis NN of IN only JJ distance NN that IN an DT earthquake NN occurs VVZ on IN a DT named VVN fault NN . SENT Return NN to TO top VV of IN faq NP How WRB did VVD you PP decide VV which WDT places NNS to TO use VV for IN computing VVG the DT distance NN to TO individual JJ earthquakes NNS . SENT The DT list NN of IN populated JJ places NNS comes VVZ from IN the DT U NP . SENT S NP . SENT Census NP Bureau NP Census NP 2000 CD gazetteer NN of IN places NNS . SENT We PP sort VV the DT list NN based VVN on IN population NN , , then RB choose VV the DT four CD places VVZ closest JJS to TO epicenter NN . SENT We PP check VVP to TO see VV that IN at IN least JJS one CD of IN the DT names NNS is VBZ shown VVN on IN the DT map NN , , or CC that IN one CD place NN on IN the DT list NN has VHZ a DT population NN of IN at IN least JJS 100 CD , , 000 CD people NNS . SENT Return NN to TO top VV of IN faq NP How WRB did VVD you PP decide VV which WDT places NNS to TO plot VV on IN the DT maps NNS . SENT The DT list NN of IN places NNS comes VVZ from IN the DT U NP . SENT S NP . SENT Census NP Bureau NP Census NP 2000 CD gazetteer NN of IN places NNS . SENT The DT name NN selection NN scheme NN places VVZ priority NN on IN population NN while IN requiring VVG locations NNS to TO be VB separated VVN by IN a DT minimum JJ specified JJ distance NN . SENT The DT algorithm NN attempts VVZ to TO find VV at IN least JJS 4 CD names NNS on IN a DT map NN , , with IN one CD in IN each DT quadrant NN of IN the DT map NN . SENT It PP begins VVZ with IN a DT requirement NN for IN a DT minimum JJ population NN 16 CD , , 000 CD 64 CD , , 000 CD , , respectively RB , , for IN the DT 2 CD 10 CD deg NN maps NNS and CC a DT minimum JJ location NN separation NN of IN 25 CD 130 CD km NN , , respectively RB , , within IN each DT map NN . SENT For IN those DT maps NNS in IN which WDT the DT algorithm NN could MD not RB find VV one CD populated JJ place NN above IN the DT minimum JJ population NN within IN each DT quadrant NN of IN the DT map NN , , it PP progressively RB relaxed VVD the DT population NN criteria NNS to TO a DT minimum NN of IN 100 CD 25 CD , , 000 CD , , respectively RB , , or CC until IN it PP found VVD a DT place NN in IN the DT quadrant NN . SENT In IN Alaska NP where WRB the DT population NN is VBZ sparse JJ , , any DT place NN was VBD accepted VVN if IN it PP didn't VVD violate VV the DT separation NN rule NN . SENT Almost RB all DT places NNS with IN a DT population NN greater JJR than IN 350 CD , , 000 CD are VBP guaranteed VVN a DT place NN on IN the DT map NN . SENT Return NN to TO top VV of IN faq NP FAQ NP about IN Earthquakes NNS Earthquake NN Preparedness NN The DT USGS NP Earthquake NN Hazards NNS Program NN EHP NN of IN the DT U NP . SENT S NP . SENT Geological JJ Survey NP USGS NP is VBZ part NN of IN the DT National NP Earthquake NN Hazards NNS Reduction NP Program NP NEHRP NP led VVD by IN the DT National NP Institute NP of IN Standards NPS and CC Technology NP NIST NP . SENT U NP . SENT S NP . SENT Department NP of IN the DT Interior NP , , U NP . SENT S NP . SENT Geological JJ Survey NN This DT page NN is VBZ brought VVN to TO you PP by IN the DT Earthquake NN Hazards NNS Program NP URL NP . SENT http NN . SENT earthquake NN . SENT usgs NNS . SENT gov NP recenteqsww NP faq NP . SENT htm NN Maintained VVD by IN . SENT Web NP Team NP Last JJ modification NN . SENT 26 CD September NP 2005 CD Contact NP Us NP . SENT Web NP Team NP USGS NP Privacy NN Statement NN Disclaimer NN FOIA NP Accessibility NN