In their press release, the scientists say that there is no "tremor" on the surface of the water, but a "shower of glowing stars" can be seen under water (note: probably, they refer to white ash and tephra particles floating as seen in the video). They conclude that the vent remains active, and generates a convecting column of hot water rising up to 40 m depth. Temperatures of over 60ºC were measured in the area where the robot could approach. Also, fish and other marine life could be seen in some videos proofing that life persists despite the eruption. [less]

New bathymetric data show that the submarine cone has reached 88 m below sea levels, and has thus grown 36 meters during the past month. If present grow rate continues, "we should start to see surface disturbances in about two to four week as hydro magmatic explosions start", Carl writes in an analysis on the interesting lavacafe blog (see comments). [less]

In fact, seismic and visual activity are not completely absent, but only at very low levels with ever increasing intervals of complete absence. Since there is no direct observation of the submarine vent to determine if any lava is still being erupted, it is difficult to say whether the eruption has ended. However, the overall decreasing trend during the past months illustrates that the eruption is gradually fading out, if it has not yet died already. [less]

Earthquake activity continues with 5-10 mostly very small, but slightly stronger compared to previous weeks, quakes centered around 10 km depth mostly in the south-central part of the island. These quakes could suggest that intrusions of magma in the upper crust beneath the island continue, and there is a small chance that new vents could open up. [less]

The research vessel Ramon Margalef and other ships have started a new bathymetry mission, which hopefully will result in a detailed mapping of the new submarine topography of the area of the ven [less]

The most interesting finding is perhaps that the submarine edifice, which sits on the steeply descending floor of a submarine canyon, and is about 100-150 tall, has not grown significantly over the past weeks and there is a secondary prominent vent that has accumulated enough lava to form a small flank cone about 80 m tall and peaking at 200 m depth. The depth of the principal vent is still at about 120 m below sea level.
If current eruption rates continue, it seems extremely unlikely that the eruption, within a foreseeable time, is able to breach the surface to produce Surtseyan explosions or even form a new island. [less]

On 15 February, more than 20 quakes were measured. Most of the earthquakes were very small, well below magnitude 2, and were clustered beneath the NW and SW sectors of the island at depths of around 10 km.
There is no conclusive interpretation of this measurement. A possible (and usually assumed) scenario is that rising new magma from the mantle reservoir is creating new intrusions and rupturing rock to create pathways in the crust under El Hierro, not using the same paths as until now. That would explain why less magma is currently being erupted at the current vent(s). In that scenario, the eruption will continue, perhaps even from a different vent, and an increase in magma output is going to be expected any time soon. However, this is speculation. [less]

The tremor signal fluctuates between very periods of low and medium intensity with episodes of bursts, probably corresponding to deep-water magma-steam explosions. Few earthquakes continue to occur, mostly of small magnitude and concentrated in the SW sector of the island. [less]