Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 04-08-1988 and time 21:56:53 (Italy) in region 6 km E Nocera Umbra (PG)

A magnitude Md 2.5 earthquake occured in region: 6 km E Nocera Umbra (PG), on

  • 04-08-1988 19:56:53 (UTC)
  • 04-08-1988 21:56:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1270, 12.8640 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Nocera Umbra PG 6 5839 5839
Sefro MC 7 422 6261
Fiuminata MC 9 1402 7663
Serravalle di Chienti MC 9 1070 8733
Pioraco MC 12 1134 9867
Valtopina PG 12 1398 11265
Gualdo Tadino PG 13 15208 26473
Muccia MC 16 915 27388
Esanatoglia MC 16 2034 29422
Camerino MC 17 6974 36396
Pieve Torina MC 18 1458 37854
Castelraimondo MC 18 4587 42441
Monte Cavallo MC 19 145 42586
Matelica MC 19 9981 52567
Pievebovigliana MC 19 866 53433

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Foligno (57155 inhabitants)
39 Km E of Perugia (166134 inhabitants)
65 Km N of Terni (111501 inhabitants)
76 Km SW of Ancona (100861 inhabitants)
81 Km S of Fano (60888 inhabitants)
86 Km NW of Teramo (54892 inhabitants)
87 Km S of Pesaro (94582 inhabitants)
88 Km E of Arezzo (99543 inhabitants)
97 Km NW of L'Aquila (69753 inhabitants)
100 Km NE 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
ML-VAX 1.6 		1988-08-04
19:56:53		 43.127 12.864 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 74799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-08-04 19:56:53 ± 0.175
Latitude 43.1270 ± 0.0112
Longitude 12.8640 ± 0.0120
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 74799

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) 1578.4
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
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) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.01417
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 74799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:10:33

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 74799
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(km) Takeoff_angle Residual Weight
--.AZI.Z. 1988-08-04T19:57:34.00 10.0 undecidable manual SN 159 1.2099 0.52 0.3
--.CRE.Z. 1988-08-04T19:57:23.50 10.0 undecidable manual SG 306 0.8214 1.1 0.1
--.SDI.Z. 1988-08-04T19:57:21.00 10.0 undecidable manual PN 153 1.5762 -0.64 0.5
--.MNS.Z. 1988-08-04T19:57:19.86 10.0 undecidable manual SG 190 0.7437 -0.21 0.6
--.AZI.Z. 1988-08-04T19:57:17.00 10.0 undecidable manual PN 159 1.2099 0.37 0.9
--.ALP.Z. 1988-08-04T19:57:15.85 10.0 undecidable manual SG 123 0.6105 0.06 1
--.CRE.Z. 1988-08-04T19:57:11.00 10.0 undecidable manual PG 306 0.8214 0.77 0.5
--.MNS.Z. 1988-08-04T19:57:08.74 10.0 undecidable manual PG 190 0.7437 -0.15 1.4
--.AM8.Z. 1988-08-04T19:57:07.13 10.0 undecidable manual PG 51 0.6771 -0.43 1.2
--.ARV.Z. 1988-08-04T19:57:07.42 10.0 undecidable manual SG 8 0.3663 -0.54 0.4
--.ALP.Z. 1988-08-04T19:57:06.21 10.0 undecidable manual PG 123 0.6105 -0.21 1.5
--.MC8.Z. 1988-08-04T19:57:05.22 10.0 undecidable manual PG? 67 0.4329 2.18 0
--.SS8.Z. 1988-08-04T19:57:05.42 10.0 undecidable manual SG 113 0.2886 0.16 0.9
--.CM8.Z. 1988-08-04T19:57:02.81 10.0 undecidable manual SG 71 0.2109 0.44 0.7
--.ARV.Z. 1988-08-04T19:57:01.31 10.0 positive manual PG 8 0.3663 -0.59 1.9
--.SS8.Z. 1988-08-04T19:57:00.32 10.0 undecidable manual PG 113 0.2886 -0.02 1.7
--.ASS.Z. 1988-08-04T19:57:00.41 10.0 undecidable manual SG 247 0.1665 -0.24 0.6
--.CM8.Z. 1988-08-04T19:56:58.74 10.0 undecidable manual PG 71 0.2109 0.07 1.6
--.ASS.Z. 1988-08-04T19:56:57.59 10.0 positive manual PG 247 0.1665 -0.09 3.3
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