1. Catalogue and analyse existing 1 seismic and ins~mental). [ regional earthquake data (macro- +, 2. Establish regional systems for I monitoring seismicity, strong ground motion, etc. I 11. Measure building accelerations in earthquake. 4 [ 12. Draft seismic parameters for 1 I earthquake-resistant building code. I r v I Is there adequate interdisciplinary under- standing of earthquake occurrence and effects? Review and optimize code para- meters in the light of new earthquake and damage observations. 1 ~~~ Review and update earthquake- resistant code and disaster relief plans at regular intervnls. 4 15 6.1.2 Example of an empirical formula Many major earthquakes occur in close association with faults that have been recognized, or could have been recognized, in advance of the earthquake. From studies of a number of cases of faulting, relationships may be established between the magnitude of the event (N), the associated length of rupture (L) and maximum displacement (22) in centimetres. The following empirical formula, for example, is applicable in the Middle East: Ms = 1.1 + 0,410g(L1*58 R2) for 8kM h 5 This equation or similar expressions for other areas may be used to estimate the maximum expected magnitude which might result from faults of known or inferred length and mobility in the area of interest. 6.1.3 The activity of faults Using geological, seismological and historical data it is often possible to assess the relative activity of a geological fault and to cIassify it into one of the following categories: (i) Active (ii) Potentially active (iii) Uncertain activity (iv) Inactive. These categories are described briefly below: (i) Active faults - These are marked by historical or recent surface faulting associated with damaging earthquakes; by tectonic fault creep or geodetic indication of fault movement; by geologically young deposits being displaced or cut by faulting; by fresh geomorphic 
**Analysis**
The text appears to be related to the study of earthquakes and the development of earthquake-resistant building codes. It discusses the analysis of existing earthquake data, the establishment of monitoring systems, and the measurement of building accelerations. The text also mentions the use of empirical formulas to estimate the maximum expected magnitude of earthquakes and the classification of faults based on their activity. This suggests that the text is focused on the field of science and technology, specifically in the area of seismology.

**Category**
Science and technology