Earthquake with magnitude of Md 2.3 on date 25-10-1997 and time 22:37:15 (Italy) in region 4 km S Montereale (AQ)

A magnitude Md 2.3 earthquake occured in region: 4 km S Montereale (AQ), on

  • 25-10-1997 20:37:15 (UTC)
  • 25-10-1997 22:37:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.49, 13.26 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montereale AQ 4 2581 2581
Cagnano Amiterno AQ 4 1369 3950
Barete AQ 5 737 4687
Capitignano AQ 5 665 5352
Pizzoli AQ 7 4326 9678
Borbona RI 11 617 10295
Campotosto AQ 12 542 10837
Scoppito AQ 13 3727 14564
Posta RI 14 694 15258
Amatrice RI 16 2657 17915
Cittareale RI 16 482 18397
Antrodoco RI 17 2588 20985
Micigliano RI 17 127 21112
Borgo Velino RI 19 972 22084
Crognaleto TE 19 1297 23381
L'Aquila AQ 19 69753 93134

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
69 Km SE of Foligno (57155 inhabitants)
70 Km NE of Tivoli (56533 inhabitants)
70 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
76 Km W of Chieti (51815 inhabitants)
78 Km W of Pescara (121014 inhabitants)
92 Km NE of Roma (2864731 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
98 Km NE of Velletri (53303 inhabitants)
99 Km SE of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 2.3 1997-10-25
20:37:15
42.49 13.26 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 306039
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-10-25 20:37:15 ± 0.225
Latitude 42.49 ± 0.01
Longitude 13.26 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 306039

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 2201.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00429
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 306039
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:47:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1997-10-25T20:37:31.44 10.0 undecidable manual SG 256 0.0039 0.19 0.4
--.PQ9.Z. 1997-10-25T20:37:31.70 10.0 undecidable manual SG 167 0.0043 -0.86 0
--.NRCA.Z. 1997-10-25T20:37:28.60 10.0 undecidable manual SG 342 0.0032 -0.06 0.5
--.PQ9.Z. 1997-10-25T20:37:26.12 10.0 undecidable manual PG 167 0.0043 0.88 0.1
--.MNS.Z. 1997-10-25T20:37:24.40 10.0 positive manual PG 256 0.0039 -0.08 2.3
--.NRCA.Z. 1997-10-25T20:37:23.20 10.0 positive manual PG 342 0.0032 0.04 2.5
--.AQU.Z. 1997-10-25T20:37:19.48 10.0 undecidable manual PG 142 0.0015 -0.07 1.1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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