Earthquake with magnitude of Md 2.5 on date 28-12-1988 and time 01:56:29 (Italy) in region 5 km SW Accumoli (RI)

A magnitude Md 2.5 earthquake occured in region: 5 km SW Accumoli (RI), on

  • 28-12-1988 00:56:29 (UTC)
  • 28-12-1988 01:56:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6580, 13.2080 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
Accumoli RI 5 667 667
Cittareale RI 6 482 1149
Amatrice RI 7 2657 3806
Arquata del Tronto AP 15 1178 4984
Montereale AQ 15 2581 7565
Capitignano AQ 17 665 8230
Borbona RI 17 617 8847
Campotosto AQ 17 542 9389
Cascia PG 17 3217 12606
Posta RI 17 694 13300
Norcia PG 18 4957 18257

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
85 Km W of Pescara (121014 inhabitants)
86 Km W of Chieti (51815 inhabitants)
94 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
Bulletin
Rev1000
Md 2.5 1988-12-28
00:56:29
42.658 13.208 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 84179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-12-28 00:56:29 ± 0.337
Latitude 42.6580 ± 0.0156
Longitude 13.2080 ± 0.0415
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 84179

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) 3806.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 167
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
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) 0.00421
Epicentral distance of station farthest from the epicenter (degree) 0.00939
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 84179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:19:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ARV.Z. 1988-12-28T00:56:59.33 10.0 undecidable manual SG 346 0.8547 -0.24 0.5
--.CP9.Z. 1988-12-28T00:56:58.58 10.0 undecidable manual SG 193 0.8214 0.41 0.5
--.ASS.Z. 1988-12-28T00:56:51.50 10.0 undecidable manual SG 314 0.5661 1.19 0.2
--.SDI.Z. 1988-12-28T00:56:49.60 10.0 negative manual PG 154 1.0434 -0.52 1.9
--.CP9.Z. 1988-12-28T00:56:47.40 10.0 undecidable manual PG 193 0.8214 1.54 0.2
--.ARV.Z. 1988-12-28T00:56:46.21 10.0 negative manual PG 346 0.8547 -0.45 2.3
--.MNS.Z. 1988-12-28T00:56:46.20 10.0 undecidable manual SG 234 0.4662 -0.95 0.3
--.ASS.Z. 1988-12-28T00:56:41.50 10.0 undecidable manual PG 314 0.5661 0.18 1.4
--.MNS.Z. 1988-12-28T00:56:38.65 10.0 negative manual PG 234 0.4662 -0.84 1.7
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download