Thursday 27 April 2023 · one signal · plateau
Iran seizes second oil tanker
Iran seized a second Marshall Islands-flagged oil tanker in late April 2023, heightening concerns about shipping security in the region. The incident generated significant public attention and discussion about geopolitical risks to maritime trade.
Peak 83.0 on Friday 28 April 2023. The shaded band is the incident window.
Where the attention came from
Social-led, both over the window and on the peak day. Social here is X alone — Bluesky only joins the series from July 2024 — so its level isn't directly comparable with today's series, though its share of this incident is real.
Bar = share of the extra attention over the whole window; the tick marks the share on the peak day alone, where the two differ.
How unusual it was
This was above 79% of all days since 2020, and the highest since Saturday 20 August 2022.
How far it spread
Stayed in one vessel type — 1 of 6 vessel-type groups drew clearly more readers than usual.
The car-carrier multiple here is a measurement artefact: the underlying Wikipedia article carried a sustained surge of automated, non-human traffic from April 2023 that vanished overnight on 1 June 2024, so its lifts in that period do not reflect reader interest.
Readers here means readers of the Wikipedia article on each vessel type — the same source as the Research signal, not news coverage — so an incident can dominate the news without moving this panel. Bars start at 1× — normal readership for that vessel type, the weeks before the incident. Grey = no clear lift. "Over time" shows each group's daily readers through the window; "All 12 articles" breaks the six groups back into their members.
How it was framed the frame glossary →
Lead frame: geopolitical pawn. Trade press was 7% of in-scope coverage — the story had left the trade press and gone mainstream. (Historical coverage is scored on headlines only.)
Acting, or acted upon
In 77% of coverage shipping was the thing acted upon rather than the actor.
How the coverage sounded
Coverage ran 85% negative overall; 31% strongly so.
Each article is scored on a five-step scale from strongly negative to strongly positive; the bar is the share of coverage at each step.
- social = X only before Bluesky (2024-07-01); not comparable with today's series
- The coverage panels count only articles matched to this incident specifically.
Maritime Attention Index, incident: Iran seizes second oil tanker, peak 83.0 on 28 April 2023. maritimeattentionindex.com/incidents/2023-iran-seizes-second-oil-tanker/