b'Seismic window Because this prospect is on a fault terrace,which places younger possibly poor sealelements considered, so what could go it also needs a cross fault seal This is notsediments against the reservoir sectionwrong? It all hinges on the presence or difficult to the east because the largeHowever, the structural dip of theabsence of the transgressive sand This fault throws position the reservoir rocksunconformity is down to the west alongcould make or break the trap, but the low in the hanging wall against the upliftedthe western edge of the prospect (F), sochance of success given to this prospect older shales (E) any hydrocarbons escaping to the westis, I believe, because it is too complicated would be captured and fed back into theand difficult to understandStructural dip to the north providesreservoirclosure in that direction, so this leavesWhere is it? Thats a secret, but if you the fault seal to the west The westernThe amplitude supported prospectcan guess Im told the acreage is for sale fault has a throw down to the west,looks attractive with all the different trapGood luckHenderson byte: Are coronal mass ejections harmful to humans?Coronal mass ejections (CMEs), as distinct from ordinary solar flares, are large clouds of magnetised gas or plasma erupting from the Suns corona Their appearance on the Sun, and how they differ from solar flares, is graphically shown in wwwNASAgov videosGenerally, solar flares overwhelm the Earths magnetosphere and cause magnetic storms that disrupt radio and electrical transmissions and knock out power stations and now, the internet CMEs have a more powerful effect, and their possible impact on humans is particularly concerning with astronauts now in space and on the Moon Consequently, there is an urgent need to be able to forecast their arrival, and as a result a new science of space weather is emerging, but that is a topic for another timeA recent example of the damage that can be caused by CMEs was that attributed to the destruction of 40 Starlink satellites launched by SpaceX at beginning of February, 2022, when a CME produced extra drag in Earths upper atmosphere causing them to burn up Recent studies suggest that the storm that caused the Starlink disaster was only a relatively minor oneUsually, some warning of a CME is a solar flare arriving at Earth onetwo days after the eruption However, it has been observed that some CMEs erupt with no visible warning These are called Stealth CMEsOne researcher working on ways to predict CMEs is Jennifer OKane who, when at the Defence Science and Technology Laboratory in UK, used NASAs STEREO satellite (launched in 2006) explicitly to study CMEs Its stereo ability enables a triangulation of the points of origin of CMEs on the Sun, which helped to convince OKane that some were erupting with no visible warning In 2020, when at University College London, OKane used STEREO images to detect ultra-faint magnetic structures at the origin of stealth CMEs She and others postulated that some different physics is involved in launching stealth CMEs OKane has now joined a team of researchers in the International Space Science Institute in Switzerland who are studying this very questionThe frequency of coronal ejections is not strictly related to solar 11-year cycles Large coronal mass ejections occur on average a few times a day at solar maximum, down to one every few days at solar minimum One-third of CMEs are estimated to be stealthy in the cycle minimum, and even more in the cycle maximum More on this topic is available at https://enwikipediaorg/wiki/Coronal_mass_ejectionResearchers have observed that solar storms with their associated strong magnetic fields disrupt the navigation of pigeons and other birds and insects, and we know that changing magnetic fields alter human brain wave patterns (see Henderson, Preview 210) By analysing the records of deaths in 263 US cities, Dr Vieira of Harvard University and her colleagues found that an excess of persons die of heart attacks in years of high solar activity (Science of the Total Environment, doiorg/h2dg) To better understand why, Dr Vieras team examined the ECGs of the hearts of 800 men in the US during intense magnetic disturbances and found that they exhibited stress (New Scientist, 25 June 2022) In years of strong activity this can amount to thousands of extra deaths This research is ongoingIncidentally, the next maximum in the solar cycle is just three years away!Roger Henderson rogah@tpg.com.au35 PREVIEW OCTOBER 2022'