The number of initial jobless claims filed by unemployed Americans rose unexpectedly this past week after experiencing a month of weekly declines. For the week ending April 9, Americans filed 412,000 initial jobless claims, which is 27,000 more claims when compared to the previous week's revised figure of 385,000. It's also the highest claims report on record since mid-March. Analysts with Econoday said, "Markets are showing no significant reaction despite the possibility that today's report could be the first signal of trouble for April payrolls." The four-week moving average was 395,750, compared to the previous week's figure of 390,250. This is the highest four-week moving average figure since mid-March, Econoday said. Although analysts have been watching to see if volatility in Japan will impact jobless claims, Econoday said Thursday "supply disruptions tied to Japan were not cited." Write to Kerri Panchuk.