Earthquake with magnitude of Md 1.9 on date 24-12-1988 and time 01:17:17 (Italy) in region 6 km E Cerreto di Spoleto (PG)

A magnitude Md 1.9 earthquake occured in region: 6 km E Cerreto di Spoleto (PG), on

  • 24-12-1988 00:17:17 (UTC)
  • 24-12-1988 01:17:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.81, 12.99 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
Cerreto di Spoleto PG 6 1075 1075
Norcia PG 9 4957 6032
Preci PG 9 724 6756
Cascia PG 10 3217 9973
Sellano PG 10 1079 11052
Vallo di Nera PG 11 364 11416
Poggiodomo PG 12 117 11533
Sant'Anatolia di Narco PG 15 564 12097
Visso MC 16 1107 13204
Castelsantangelo sul Nera MC 17 281 13485
Scheggino PG 17 461 13946
Campello sul Clitunno PG 17 2442 16388
Monteleone di Spoleto PG 18 599 16987
Ussita MC 20 444 17431

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
59 Km SE of Perugia (166134 inhabitants)
61 Km W of Teramo (54892 inhabitants)
61 Km NW of L'Aquila (69753 inhabitants)
84 Km NE of Viterbo (67173 inhabitants)
92 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
100 Km SW of Ancona (100861 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 1.9 1988-12-24
00:17:17
42.81 12.99 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 83939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-12-24 00:17:17 ± 0.15
Latitude 42.81 ± 0.00
Longitude 12.99 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 83939

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) 1316.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.00316
Epicentral distance of station farthest from the epicenter (degree) 0.00615
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 83939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:18:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1988-12-24T00:17:43.21 10.0 undecidable manual SG 356 0.0062 0.29 0.2
--.MNS.Z. 1988-12-24T00:17:36.00 10.0 undecidable manual SG 208 0.0043 -0.14 0.7
--.ARV.Z. 1988-12-24T00:17:32.10 10.0 undecidable manual PG 356 0.0062 -0.22 0.9
--.ASS.Z. 1988-12-24T00:17:31.45 10.0 undecidable manual SG 315 0.0032 -0.18 0.6
--.MNS.Z. 1988-12-24T00:17:28.50 10.0 undecidable manual PG 208 0.0043 0.09 2
--.ASS.Z. 1988-12-24T00:17:25.94 10.0 undecidable manual PG 315 0.0032 0.13 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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