Earthquake with magnitude of Md 2.3 on date 09-07-1997 and time 07:41:38 (Italy) in region 1 km N Castel Sant'Angelo (RI)

A magnitude Md 2.3 earthquake occured in region: 1 km N Castel Sant'Angelo (RI), on

  • 09-07-1997 05:41:38 (UTC)
  • 09-07-1997 07:41:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.41, 13.03 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
Castel Sant'Angelo RI 1 1308 1308
Borgo Velino RI 3 972 2280
Antrodoco RI 5 2588 4868
Micigliano RI 5 127 4995
Cittaducale RI 7 6828 11823
Concerviano RI 10 291 12114
Cantalice RI 12 2755 14869
Petrella Salto RI 13 1197 16066
Rieti RI 14 47698 63764
Posta RI 14 694 64458
Borbona RI 15 617 65075
Belmonte in Sabina RI 15 636 65711
Poggio Bustone RI 16 2055 67766
Longone Sabino RI 16 597 68363
Rocca Sinibalda RI 17 815 69178
Cagnano Amiterno AQ 17 1369 70547
Fiamignano RI 18 1413 71960
Leonessa RI 18 2435 74395
Varco Sabino RI 19 187 74582
Rivodutri RI 19 1253 75835
Scoppito AQ 19 3727 79562

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of L'Aquila (69753 inhabitants)
36 Km E of Terni (111501 inhabitants)
52 Km NE of Guidonia Montecelio (88673 inhabitants)
53 Km NE of Tivoli (56533 inhabitants)
62 Km W of Teramo (54892 inhabitants)
67 Km SE of Foligno (57155 inhabitants)
73 Km NE of Roma (2864731 inhabitants)
76 Km E of Viterbo (67173 inhabitants)
83 Km N of Velletri (53303 inhabitants)
93 Km NE of Pomezia (62966 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
94 Km W of Chieti (51815 inhabitants)
96 Km NE of Aprilia (73446 inhabitants)
96 Km NE of Fiumicino (78395 inhabitants)
98 Km W of Pescara (121014 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
ML-VAX 1.5
1997-07-09
05:41:38
42.41 13.03 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 272949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-07-09 05:41:38 ± 0.931
Latitude 42.41 ± 0.02
Longitude 13.03 ± 0.02
Depth (km) 10 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 272949

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) 3180.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00227
Epicentral distance of station farthest from the epicenter (degree) 0.00979
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 6
Type of magnitude Md
Reference to an origin 272949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:17:57

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 272949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1997-07-09T05:42:14.37 10.0 undecidable manual SN 356 0.0098 -0.18 0.5
--.ASS.Z. 1997-07-09T05:42:02.82 10.0 undecidable manual SG 336 0.0063 0.04 0.7
--.ARV.Z. 1997-07-09T05:41:59.86 10.0 undecidable manual PN 356 0.0098 0.73 0.9
--.SDI.Z. 1997-07-09T05:41:57.00 10.0 undecidable manual PG 139 0.0081 0.99 0.7
--.PQ9.Z. 1997-07-09T05:41:54.16 10.0 undecidable manual SG 144 0.0042 -1.08 0.3
--.ASS.Z. 1997-07-09T05:41:51.21 10.0 undecidable manual PG 336 0.0063 -1.12 0.6
--.MNS.Z. 1997-07-09T05:41:48.94 10.0 undecidable manual SG 264 0.0023 0.66 0.5
--.PQ9.Z. 1997-07-09T05:41:46.83 10.0 undecidable manual PG 144 0.0042 -1.14 0.6
--.AQU.Z. 1997-07-09T05:41:45.10 10.0 undecidable manual PG 100 0.0025 0.62 1.4
--.MNS.Z. 1997-07-09T05:41:43.97 10.0 positive manual PG 264 0.0023 0.02 3.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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