Earthquake with magnitude of Md 2.4 on date 02-06-1991 and time 12:30:15 (Italy) in region 6 km N Borbona (RI)

A magnitude Md 2.4 earthquake occured in region: 6 km N Borbona (RI), on

  • 02-06-1991 10:30:15 (UTC)
  • 02-06-1991 12:30:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.56, 13.15 at 5 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
Borbona RI 6 617 617
Cittareale RI 6 482 1099
Posta RI 6 694 1793
Montereale AQ 9 2581 4374
Cagnano Amiterno AQ 13 1369 5743
Capitignano AQ 13 665 6408
Amatrice RI 13 2657 9065
Micigliano RI 15 127 9192
Leonessa RI 15 2435 11627
Accumoli RI 17 667 12294
Barete AQ 17 737 13031
Antrodoco RI 17 2588 15619
Campotosto AQ 18 542 16161
Pizzoli AQ 19 4326 20487
Monteleone di Spoleto PG 19 599 21086
Borgo Velino RI 19 972 22058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
41 Km E of Terni (111501 inhabitants)
47 Km W of Teramo (54892 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
72 Km NE of Guidonia Montecelio (88673 inhabitants)
73 Km NE of Tivoli (56533 inhabitants)
82 Km W of Montesilvano (53738 inhabitants)
87 Km W of Chieti (51815 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
87 Km E of Viterbo (67173 inhabitants)
88 Km W of Pescara (121014 inhabitants)
93 Km NE of Roma (2864731 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 2.4
ML-VAX 2.1
1991-06-02
10:30:15
42.57 13.15 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 142449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-06-02 10:30:15 ± 0.364
Latitude 42.57 ± 0.02
Longitude 13.15 ± 0.03
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 142449

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) 3050.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.00882
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 142449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:12:59

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 142449
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
--.SDI.Z. 1991-06-02T10:30:51.00 10.0 undecidable manual SG 150 0.0088 1.45 0.1
--.ASS.Z. 1991-06-02T10:30:37.70 10.0 undecidable manual SG 323 0.0055 -0.04 0.9
--.SDI.Z. 1991-06-02T10:30:36.60 10.0 undecidable manual PG 150 0.0088 1.09 0.7
--.MNS.Z. 1991-06-02T10:30:30.43 10.0 undecidable manual SG 242 0.0035 0.21 0.9
--.ASS.Z. 1991-06-02T10:30:28.28 10.0 undecidable manual PG 323 0.0055 0.13 2.1
--.AQU.Z. 1991-06-02T10:30:24.75 10.0 undecidable manual SG 138 0.0025 -1.25 0.3
--.MNS.Z. 1991-06-02T10:30:23.30 10.0 undecidable manual PG 242 0.0035 -0.51 1.8
--.AQU.Z. 1991-06-02T10:30:20.52 10.0 undecidable manual PG 138 0.0025 -0.86 1.3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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