Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The auxiliary function method for waveform based earthquake location   This paper introduces the auxiliary function method (AFM), a novel, fast and
simple approach for waveform based earthquake location. From any initial
hypocenter and origin time, we can construct the auxiliary function, whose zero
set contains the real earthquake hypocenter and the origin time. In most of
situations, there are very few elements in this set. The overall computational
cost of the AFM is significantly less than that of the iterative methods.
According to our numerical tests, even for large noise, the method can still
achieve good location results. These allow us to determine the earthquake
hypocenter and the origin time extremely fast and accurate.

20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn