First post on here, hopefully it will make sense!
Firstly, relating to the Incident about to occur during the construction of the Swan. As we learnt in Some Like It Hoth, the Swan is situated in the Others territory. Given the innate knowledge of the Others in relation to the Island and the amount of people working on the Swan, I doubt very much it's construction is going to avoid the attention of the Others. The level of secrecy and the amount of armed guards at the site would appear to indicate that Horace and the other members of the "Circle of Trust" think the Others will learn about the site as well and likely attack such a flagrate disregard of the Truce. I reckon therefore there will be an attack on the construction site, possibly on or near completion of the station and in the resultant firefight, the shield that Dharma were using to control or protect against the magnetic effects of that region will be damaged.
The magnetic properties of the Swan site were obviously strong, but it has been hinted that they are also unpredictable; assuming Alvarez really did get a filling shooting through his brain, that would appear to indicate that the magnetic effect repelled the metal filling - yet in the Swan itself, and in the case of Oceanic 815, metal objects are attracted to the concrete wall we assume contains the electromagnetic material. Therefore, it may be that the Swan used a magnetic shield to mostly negate the magetic effect by making it the same polarity as the ground and thus make the Swan safe to live in. Think, if the ground is magnetic North, then the shield must also be North to cause them to repel. May well be given that the polarity of the magnetic region in the ground changes every 108 minutes requiring the shields polarity to change, otherwise the shield and the ground would be at different polarities, which may have strengthened the magnetic properties so they reached hig! h enough to, say, pull down a passing plane... In addition to this, turning the Failsafe Key could have shut this shield now completely, thus causing the magnetic effort of the ground to return to normal, but also pulled most things towards the ground causing the hatch to implode and, true, to the unpredictable nature of the ground, caused the hatch lid to repel and land on the beach. It may well be Radzinsky desire not to be caught in an implosion that stops the Failsafe being used at any point before this. This is mostly conjecture, but there has to be some reason Radzinsky, Kelvin, Desmond can all live in the Swan without getting impaled by metal objects, or the haemoglobin in their blood falling apart.
Related to this, I think the "Incident" will be covered up by the Circle of Trust, as if indeed there was a massive incursion by the Others and Dharma lost a lot of people, the loss of morale could cause the whole Dharma operation to be shut down. Therefore, Radzinsky will be instructed to stay in the Swan to maintain it, recruits will be sent to assist him and he will told to maintain the whole "quarantine" thing to stop these recruits from antagonising the Others... however, the Dharma are purged, these recruits dry up, noone comes to relieve him, Radzinsky starts to turn slightly mad due to loneliness/entering the same numbers every day, and the Others, observing Radzinskys strange behaviour in the Pearl cameras, recruit Kelvin under the guise of Dharma. The reasoning behind this is that for whatever reason the Swan has to kept going until 2004 or Oceanic 815 doesn't crash in 2004 and the timeline falls apart. This doesn't necessarily mean Kelvin is an Other, if fact more! likely the opposite - Radzinsky would be aware the Others know of the Swan, and he seems pretty paranoid anyway, so anyone with more than a basic knowledge of the Island might arouse his suspicion. May well be that isolated in the Swan, Radzinsky was not aware of the Purge as well, therefore would accept a guy in a Dharma suit. Eventually Radzinsky loses it, kills himself, and this all sets up the Swan nicely for when Desmond arrives.
Sorry for the length, but that turn of events seem rational enough to me. I don't think Jughead is involved in the Incident; it's clear it won't have detonated, and it's the sort of thing that will appear mid-Season 6 when we've all almost forgotten about it... maybe it something Brama/Illana are going for? Although a little aside that could be relevent if we are talking about electromagnetism - a detonated bomb releases an EMP (http://en.wikipedia.org/wiki/Electromagnetic_pulse) which fries all electrical equipment and stops watches, could be relevent to the story (...or not at all, who knows!)
Firstly, relating to the Incident about to occur during the construction of the Swan. As we learnt in Some Like It Hoth, the Swan is situated in the Others territory. Given the innate knowledge of the Others in relation to the Island and the amount of people working on the Swan, I doubt very much it's construction is going to avoid the attention of the Others. The level of secrecy and the amount of armed guards at the site would appear to indicate that Horace and the other members of the "Circle of Trust" think the Others will learn about the site as well and likely attack such a flagrate disregard of the Truce. I reckon therefore there will be an attack on the construction site, possibly on or near completion of the station and in the resultant firefight, the shield that Dharma were using to control or protect against the magnetic effects of that region will be damaged.
The magnetic properties of the Swan site were obviously strong, but it has been hinted that they are also unpredictable; assuming Alvarez really did get a filling shooting through his brain, that would appear to indicate that the magnetic effect repelled the metal filling - yet in the Swan itself, and in the case of Oceanic 815, metal objects are attracted to the concrete wall we assume contains the electromagnetic material. Therefore, it may be that the Swan used a magnetic shield to mostly negate the magetic effect by making it the same polarity as the ground and thus make the Swan safe to live in. Think, if the ground is magnetic North, then the shield must also be North to cause them to repel. May well be given that the polarity of the magnetic region in the ground changes every 108 minutes requiring the shields polarity to change, otherwise the shield and the ground would be at different polarities, which may have strengthened the magnetic properties so they reached hig! h enough to, say, pull down a passing plane... In addition to this, turning the Failsafe Key could have shut this shield now completely, thus causing the magnetic effort of the ground to return to normal, but also pulled most things towards the ground causing the hatch to implode and, true, to the unpredictable nature of the ground, caused the hatch lid to repel and land on the beach. It may well be Radzinsky desire not to be caught in an implosion that stops the Failsafe being used at any point before this. This is mostly conjecture, but there has to be some reason Radzinsky, Kelvin, Desmond can all live in the Swan without getting impaled by metal objects, or the haemoglobin in their blood falling apart.
Related to this, I think the "Incident" will be covered up by the Circle of Trust, as if indeed there was a massive incursion by the Others and Dharma lost a lot of people, the loss of morale could cause the whole Dharma operation to be shut down. Therefore, Radzinsky will be instructed to stay in the Swan to maintain it, recruits will be sent to assist him and he will told to maintain the whole "quarantine" thing to stop these recruits from antagonising the Others... however, the Dharma are purged, these recruits dry up, noone comes to relieve him, Radzinsky starts to turn slightly mad due to loneliness/entering the same numbers every day, and the Others, observing Radzinskys strange behaviour in the Pearl cameras, recruit Kelvin under the guise of Dharma. The reasoning behind this is that for whatever reason the Swan has to kept going until 2004 or Oceanic 815 doesn't crash in 2004 and the timeline falls apart. This doesn't necessarily mean Kelvin is an Other, if fact more! likely the opposite - Radzinsky would be aware the Others know of the Swan, and he seems pretty paranoid anyway, so anyone with more than a basic knowledge of the Island might arouse his suspicion. May well be that isolated in the Swan, Radzinsky was not aware of the Purge as well, therefore would accept a guy in a Dharma suit. Eventually Radzinsky loses it, kills himself, and this all sets up the Swan nicely for when Desmond arrives.
Sorry for the length, but that turn of events seem rational enough to me. I don't think Jughead is involved in the Incident; it's clear it won't have detonated, and it's the sort of thing that will appear mid-Season 6 when we've all almost forgotten about it... maybe it something Brama/Illana are going for? Although a little aside that could be relevent if we are talking about electromagnetism - a detonated bomb releases an EMP (http://en.wikipedia.org/wiki/Electromagnetic_pulse) which fries all electrical equipment and stops watches, could be relevent to the story (...or not at all, who knows!)