Earthquake with magnitude of Md 2.3 on date 18-11-1988 and time 00:01:15 (Italy) in region 7 km W Norcia (PG)

A magnitude Md 2.3 earthquake occured in region: 7 km W Norcia (PG), on

  • 17-11-1988 23:01:15 (UTC)
  • 18-11-1988 00:01:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.79, 13.01 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
Norcia PG 7 4957 4957
Cerreto di Spoleto PG 8 1075 6032
Cascia PG 8 3217 9249
Preci PG 10 724 9973
Poggiodomo PG 11 117 10090
Vallo di Nera PG 12 364 10454
Sellano PG 13 1079 11533
Sant'Anatolia di Narco PG 15 564 12097
Monteleone di Spoleto PG 16 599 12696
Castelsantangelo sul Nera MC 17 281 12977
Scheggino PG 17 461 13438
Visso MC 17 1107 14545
Campello sul Clitunno PG 19 2442 16987

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SE of Foligno (57155 inhabitants)
39 Km NE of Terni (111501 inhabitants)
59 Km NW of L'Aquila (69753 inhabitants)
59 Km W of Teramo (54892 inhabitants)
61 Km SE of Perugia (166134 inhabitants)
85 Km NE of Viterbo (67173 inhabitants)
91 Km N of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
99 Km W of Montesilvano (53738 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
M 2.2
1988-11-17
23:01:15
42.79 13.01 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 81379
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-11-17 23:01:15 ± 0.223
Latitude 42.79 ± 0.01
Longitude 13.01 ± 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 81379

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) 2059.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
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) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.01109
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 81379
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:16:33

M:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations
Type of magnitude M
Reference to an origin 81379
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 09:32:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.SDI.Z. 1988-11-17T23:01:58.00 10.0 undecidable manual SN 151 0.0111 1.29 0.1
--.AOI.Z. 1988-11-17T23:01:48.59 10.0 undecidable manual SG! 29 0.0078 2.29 0
--.ARV.Z. 1988-11-17T23:01:40.24 10.0 undecidable manual SG 356 0.0063 -0.8 0.3
--.SDI.Z. 1988-11-17T23:01:40.39 10.0 undecidable manual PN 151 0.0111 1.1 0.3
--.MNS.Z. 1988-11-17T23:01:33.79 10.0 undecidable manual SG 210 0.0042 0.24 0.6
--.AOI.Z. 1988-11-17T23:01:32.98 10.0 undecidable manual PG 29 0.0078 -0.3 1.1
--.ALP.Z. 1988-11-17T23:01:30.72 10.0 undecidable manual SG 91 0.0036 -0.7 0.5
--.ASS.Z. 1988-11-17T23:01:30.50 10.0 undecidable manual SG 316 0.0033 0.52 0.5
--.ARV.Z. 1988-11-17T23:01:29.36 10.0 undecidable manual PG 356 0.0063 -0.88 0.6
--.SS8.Z. 1988-11-17T23:01:27.10 10.0 undecidable manual SG 37 0.0023 1.1 0.2
--.MNS.Z. 1988-11-17T23:01:25.52 10.0 negative manual PG 210 0.0042 -0.39 2.6
--.ALP.Z. 1988-11-17T23:01:24.40 10.0 undecidable manual PG 91 0.0036 -0.65 2
--.ASS.Z. 1988-11-17T23:01:24.00 10.0 undecidable manual PG 316 0.0033 0.15 1.5
--.CIO.Z. 1988-11-17T23:01:24.42 10.0 undecidable manual PG 14 0.0037 -0.32 2.7
--.SS8.Z. 1988-11-17T23:01:22.60 10.0 undecidable manual PG 37 0.0023 1.05 1
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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