Article Per Year (5 Year)
p-Index From 2019 - 2024
0.408
P-Index
This Author published in this journals
All Journal Jurnal Meteorologi Klimatologi dan Geofisika
Ulfa Nur Silvia
Unknown Affiliation
Astronomy Earth & Planetary Sciences Environmental Science Mathematics Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
ANALISIS INDEKS KERENTANAN SEISMIK, PERIODE DOMINAN, DAN FAKTOR AMPLIFIKASI MENGGUNAKAN METODE HVSR DI STAGEOF TANGERANG Afra Kansa Maimun; Ulfa Nur Silvia; Vida Julia J.; Puji Ariyanto
Jurnal Meteorologi Klimatologi dan Geofisika Vol 7 No 2 (2020): Jurnal Meteorologi Klimatologi dan Geofisika
Publisher : Unit Penelitian dan Pengabdian Masyarakat Sekolah Tinggi Meteorologi Klimatologi dan Geofisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36754/jmkg.v7i2.194

Abstract

Microtremor is a natural harmonic vibration of the soil that occurs continuously with a low amplitude of about 0.1 - 1 micron. Microtremor characteristics show rock characteristics and types based on the value of its dominant period are used to analyzing the response of rocks to amplification of vibrations. In collecting microtremor data, we use the TDL 303S (Taide Digital Seismograph) equipment and the DS-4A Short Period Seismograph type seismometer with a recording duration of 30-45 minutes. Microtremor data measurements were carried out at 20 research points with a distance of 1 meter between points. Microtremor data processing until reach natural frequency values ​​(F0) using the Horizontal to Vertical Spectral Ratio (HVSR) method obtained by Geopsy software. From the results of microtremor data processing, it can be seen that the distribution of the dominant period value, amplification factor, and seismic vulnerability index (Kg) at Tangerang Geophysics Station. From this research, it is known that the average dominant period (Tdom) in Stageof Tangerang is (0.6572 seconds), the amplification factor is 2.4357, and the seismic vulnerability index (Kg) is 3.8991. This value shows that the dominant soil layer in this area is site class E alluvial soil T0> 0.6 seconds, this indicates that the soil type is very prone to earthquakes. But in terms of the seismic vulnerability index, low amplification factor, and dominant period it is relatively low so the impact is insignificant.
ANALISIS TINGKAT RISIKO DAN KERENTANAN BAHAYA GEMPA BUMI DI KOTA SURABAYA DALAM UPAYA PEMBERIAN INFORMASI MITIGASI BENCANA Ulfa Nur Silvia; Afra Kansa Maimuna
Jurnal Meteorologi Klimatologi dan Geofisika Vol 7 No 3 (2020): Jurnal Meteorologi Klimatologi dan Geofisika
Publisher : Unit Penelitian dan Pengabdian Masyarakat Sekolah Tinggi Meteorologi Klimatologi dan Geofisika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36754/jmkg.v7i3.204

Abstract

Surabaya segment and Waru segment, part of Baribis-Kendeng Fold Thrust Zone that passes through Surabaya City potentially affected by earthquake hazard in the future with high population that settled there and high number of buildings. The impact of earthquake hazard can be decreased by Peak Ground Acceleration (PGA), high population density, and buildings analysis as an action of mitigation. PGA value calculated by McGuire empirical formula (1974, 1977) using historical data of earthquake in the past 50 years and the result of this value among 33,991 -29,8194 gal, this result classified as low frequency related to MMI scale that released by BMKG. The map result of PGA that related to spatial data of high population and high buildings in the Surabaya conclude that east side of Surabaya has a very high risk of earthquake vulnerability.
Co-Authors Afra Kansa Maimun Afra Kansa Maimuna Puji Ariyanto Vida Julia J.