Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 26-10-1988 and time 04:32:30 (Italy) in region 3 km NW Anagni (FR)

A magnitude Md 2.5 earthquake occured in region: 3 km NW Anagni (FR), on

  • 26-10-1988 03:32:30 (UTC)
  • 26-10-1988 04:32:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.7680, 13.1290 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.

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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
Anagni FR 3 21464 21464
Acuto FR 5 1920 23384
Paliano FR 7 8281 31665
Piglio FR 7 4666 36331
Serrone FR 9 3099 39430
Fiuggi FR 9 10536 49966
Gavignano RM 10 1916 51882
Colleferro RM 11 21595 73477
Sgurgola FR 11 2676 76153
Torre Cajetani FR 12 1376 77529
Trivigliano FR 12 1705 79234
Segni RM 12 9159 88393
Gorga RM 12 710 89103
Arcinazzo Romano RM 13 1348 90451
Roiate RM 13 737 91188
Olevano Romano RM 13 6687 97875
Affile RM 13 1548 99423
Ferentino FR 13 21213 120636
Jenne RM 14 366 121002
Fumone FR 14 2102 123104
Trevi nel Lazio FR 15 1822 124926
Genazzano RM 15 6036 130962
Montelanico RM 15 2131 133093
Bellegra RM 15 2887 135980
Morolo FR 16 3257 139237
Guarcino FR 16 1623 140860
Cave RM 17 11287 152147
Valmontone RM 18 15959 168106
Rocca di Cave RM 18 377 168483
San Vito Romano RM 18 3273 171756
Subiaco RM 18 9074 180830
Vico nel Lazio FR 18 2234 183064
Artena RM 18 14276 197340
Capranica Prenestina RM 18 351 197691
Rocca Santo Stefano RM 18 975 198666
Alatri FR 18 28952 227618
Carpineto Romano RM 18 4524 232142
Supino FR 19 4873 237015
Vallepietra RM 20 283 237298
Collepardo FR 20 968 238266
Rocca Massima LT 20 1136 239402

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km E of Velletri (53303 inhabitants)
35 Km SE of Tivoli (56533 inhabitants)
38 Km NE of Latina (125985 inhabitants)
42 Km SE of Guidonia Montecelio (88673 inhabitants)
44 Km E of Aprilia (73446 inhabitants)
53 Km E of Pomezia (62966 inhabitants)
55 Km NE of Anzio (54211 inhabitants)
55 Km E of Roma (2864731 inhabitants)
69 Km SW of L'Aquila (69753 inhabitants)
74 Km E of Fiumicino (78395 inhabitants)
97 Km SE of Terni (111501 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 1.7 		1988-10-26
03:32:30		 41.768 13.129 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 79809
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-10-26 03:32:30 ± 0.175
Latitude 41.7680 ± 0.0196
Longitude 13.1290 ± 0.0099
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 79809

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) 2333.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 172
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00138
Epicentral distance of station farthest from the epicenter (degree) 0.00623
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 79809
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:15:05

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 79809
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
--.SDI.Z. 1988-10-26T03:32:49.21 10.0 undecidable manual SG 96 0.4995 0.03 0.4
--.AQU.Z. 1988-10-26T03:32:44.30 10.0 undecidable manual PG 18 0.6105 0.59 0.3
--.RMP.Z. 1988-10-26T03:32:43.90 10.0 undecidable manual SG 277 0.3108 0.03 0.5
--.RDP.Z. 1988-10-26T03:32:43.70 10.0 undecidable manual SG 268 0.3108 0.44 0.3
--.AZI.Z. 1988-10-26T03:32:43.35 10.0 undecidable manual SG 45 0.3108 0.44 0.3
--.MNS.Z. 1988-10-26T03:32:43.77 10.0 undecidable manual PG 331 0.6882 -1.16 0
--.SDI.Z. 1988-10-26T03:32:41.31 10.0 negative manual PG 96 0.4995 -0.12 2.1
--.CP9.Z. 1988-10-26T03:32:38.56 10.0 undecidable manual SG 305 0.1554 0.61 0.1
--.RMP.Z. 1988-10-26T03:32:38.90 10.0 undecidable manual PG 277 0.3108 0.19 1.1
--.AZI.Z. 1988-10-26T03:32:37.86 10.0 negative manual PG 45 0.3108 0.05 2.6
--.RDP.Z. 1988-10-26T03:32:37.74 10.0 positive manual PG 268 0.3108 0.09 2.5
--.CP9.Z. 1988-10-26T03:32:34.50 10.0 positive manual PG 305 0.1554 -0.44 1.8
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