Earthquake with magnitude of Md 2.3 on date 25-05-1999 and time 21:35:42 (Italy) in region 4 km NE Cittareale (RI)

A magnitude Md 2.3 earthquake occured in region: 4 km NE Cittareale (RI), on

  • 25-05-1999 19:35:42 (UTC)
  • 25-05-1999 21:35:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.64, 13.2 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
Cittareale RI 4 482 482
Accumoli RI 7 667 1149
Amatrice RI 8 2657 3806
Montereale AQ 14 2581 6387
Borbona RI 16 617 7004
Posta RI 16 694 7698
Capitignano AQ 16 665 8363
Arquata del Tronto AP 17 1178 9541
Cascia PG 17 3217 12758
Campotosto AQ 17 542 13300
Norcia PG 19 4957 18257
Monteleone di Spoleto PG 20 599 18856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of L'Aquila (69753 inhabitants)
42 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
86 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
93 Km E of Viterbo (67173 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 1999-05-25
19:35:42
42.65 13.2 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 366599
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-05-25 19:35:42 ± 0.206
Latitude 42.65 ± 0.01
Longitude 13.20 ± 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 366599

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) 1956.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.00518
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 4
Type of magnitude Md
Reference to an origin 366599
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:43:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1999-05-25T19:36:03.37 10.0 undecidable manual SG 316 0.0052 0.36 0.4
--.MNS.Z. 1999-05-25T19:35:59.64 10.0 undecidable manual SG 235 0.0041 0.37 0.4
--.ASS.Z. 1999-05-25T19:35:54.74 10.0 undecidable manual PG 316 0.0052 0.35 1
--.AQU.Z. 1999-05-25T19:35:54.55 10.0 undecidable manual SG 152 0.0029 -0.53 0.3
--.MNS.Z. 1999-05-25T19:35:51.97 10.0 positive manual PG 235 0.0041 -0.26 2.8
--.AQU.Z. 1999-05-25T19:35:50.25 10.0 undecidable manual PG 152 0.0029 0.44 1
--.NRCA.Z. 1999-05-25T19:35:50.18 10.0 undecidable manual SG 342 0.0017 -0.68 0.1
--.NRCA.Z. 1999-05-25T19:35:47.30 10.0 undecidable manual PG 342 0.0017 -0.08 2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download