was observed on

USAGE SUMMARY

The phrase "was observed on" is correct and usable in written English.
It can be used to indicate the date or time when something was seen or noted, often in scientific or formal contexts. Example: "The unusual behavior of the species was observed on March 15, 2023."

✓ Grammatically correct

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

When Kane died, a minute's silence was observed on German radio.

The Guardian

The police have said that Mr. Finley's stepdaughter was observed on videotape taking the bracelet.

The New York Times

This was observed on November 9, 2004.

Earth, Planets and Space

Ki67 expression was observed on L929 cells.

Progress in Biomaterials

Sequestrum was observed on panoramic view.

Maxillofacial Plastic and Reconstructive Surgery

The opposite effect was observed on CTmin.

International Congress Series

Moreover, intervalley scattering was observed on GBs.

Chemical Physics Letters

Significant improvement was observed on using glacial acetic acid.

Chemistry Central Journal

This trend was observed on all three microscopes.

Advanced Structural and Chemical Imaging

The same effect was observed on other image pairs too.

EURASIP Journal on Image and Video Processing

The highest count was observed on seedlings at farm 1.

International Journal of Food Contamination

Expert writing Tips

Best practice

When using "was observed on", clearly specify what was observed and the context in which it was observed to avoid ambiguity.

Common error

Avoid using "was observed on" when an active voice construction would be clearer and more direct. For instance, instead of "The effect was observed on the sample", consider "Researchers observed the effect on the sample".

Linguistic Context

The phrase "was observed on" functions as a passive construction indicating that something was noticed or detected at a specific time or location. Ludwig confirms its grammatical correctness and wide usage across various contexts.

Expression frequency: Very common

Frequent in

Science

82%

News & Media

16%

Wiki

2%

Less common in

Ludwig's WRAP-UP

In summary, the phrase "was observed on" is a grammatically sound and frequently used expression, as affirmed by Ludwig. It primarily functions to denote when or where something was noted or detected, typically in scientific or formal contexts. Given its passive voice construction, it's crucial to ensure clarity by specifying the subject and context of the observation. While synonyms like "was noted on" or "was recorded on" exist, the choice depends on the specific nuance you wish to convey. Primarily appearing in science and news contexts, the phrase carries a formal and objective tone. As per Ludwig, the usage of this phrase is correct and perfectly acceptable.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

was noted on

Replaces "observed" with "noted", focusing on the act of making a written record or taking notice.

was recorded on

Substitutes "observed" with "recorded", emphasizing the act of capturing data or information.

was detected on

Changes "observed" to "detected", highlighting the discovery or identification of something, often through technical means.

was noticed on

Replaces "observed" with "noticed", indicating a casual or unintentional act of seeing or becoming aware.

was identified on

Substitutes "observed" with "identified", stressing the recognition or classification of something specific.

was found on

Changes "observed" to "found", emphasizing the discovery of something in a particular location or context.

was identified upon

Similar to "was identified on", but uses "upon" to introduce a formal or slightly archaic tone.

was present on

Replaces "observed" with "present", indicating the existence or presence of something at a specific time or place.

was documented on

Substitutes "observed" with "documented", emphasizing the act of formally recording or reporting something.

was revealed on

Changes "observed" to "revealed", highlighting the uncovering or disclosure of something previously unknown or hidden.

FAQs

How can I use "was observed on" in a sentence?

Use "was observed on" to indicate when or where something was noted or detected. For example, "The change in behavior was observed on Tuesday", or "The defect was observed on the surface".

What are some alternatives to "was observed on"?

Depending on the context, you can use alternatives like "was noted on", "was recorded on", or "was detected on".

Is "was observed on" formal or informal?

"Was observed on" is generally considered neutral to formal, suitable for scientific, technical, or formal writing. For informal contexts, simpler phrasing might be more appropriate.

What is the difference between "was observed on" and "was seen on"?

"Was observed on" implies a more deliberate or scientific observation, while "was seen on" suggests a more casual sighting. You might say "The eclipse was observed on March 20th" in a scientific context, but "was seen on television" in casual conversation.