Earthquake with magnitude of Md 1.8 on date 19-05-1987 and time 22:36:05 (UTC) in region 2 km SE Nemi (RM)

A magnitude Md 1.8 earthquake occured in region: 2 km SE Nemi (RM), on

  • 19-05-1987 22:36:05 (UTC)
  • 20-05-1987 00:36:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7070, 12.7290 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Nemi RM 2 1943 1943
Genzano di Roma RM 3 23970 25913
Lanuvio RM 4 13632 39545
Velletri RM 5 53303 92848
Ariccia RM 5 19407 112255
Albano Laziale RM 6 41715 153970
Rocca di Papa RM 6 17034 171004
Castel Gandolfo RM 8 8997 180001
Lariano RM 9 13432 193433
Marino RM 9 43026 236459
Rocca Priora RM 10 11962 248421
Grottaferrata RM 10 20327 268748
Monte Compatri RM 11 11978 280726
Frascati RM 12 22087 302813
Monte Porzio Catone RM 12 8693 311506
Aprilia LT 14 73446 384952
San Cesareo RM 14 15153 400105
Colonna RM 14 4287 404392
Ciampino RM 15 38412 442804
Cisterna di Latina LT 15 36868 479672
Labico RM 16 6379 486051
Artena RM 16 14276 500327
Rocca Massima LT 16 1136 501463
Cori LT 17 11065 512528
Zagarolo RM 17 17843 530371
Valmontone RM 18 15959 546330
Ardea RM 19 49183 595513
Pomezia RM 19 62966 658479
Gallicano nel Lazio RM 20 6334 664813
Palestrina RM 20 21672 686485

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km W of Velletri (53303 inhabitants)
14 Km NE of Aprilia (73446 inhabitants)
19 Km E of Pomezia (62966 inhabitants)
29 Km SE of Roma (2864731 inhabitants)
29 Km S of Tivoli (56533 inhabitants)
30 Km N of Anzio (54211 inhabitants)
30 Km NW of Latina (125985 inhabitants)
33 Km S of Guidonia Montecelio (88673 inhabitants)
41 Km E of Fiumicino (78395 inhabitants)
89 Km E of Civitavecchia (52991 inhabitants)
91 Km SW of L'Aquila (69753 inhabitants)
94 Km SE of Viterbo (67173 inhabitants)
95 Km S 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 1.8 1987-05-19
22:36:05
41.707 12.729 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 47369
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-05-19 22:36:05 ± 0.179
Latitude 41.7070 ± 0.0088
Longitude 12.7290 ± 0.0108
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 47369

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) 1327.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 302
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00040
Epicentral distance of station farthest from the epicenter (degree) 0.00202
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:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 47369
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:46:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.CP9.Z. 1987-05-19T22:36:14.50 10.0 undecidable manual SG 47 0.222 0.05 0.6
--.RMP.Z. 1987-05-19T22:36:10.50 10.0 undecidable manual SG 349 0.0999 -0.15 0.6
--.CP9.Z. 1987-05-19T22:36:10.50 10.0 undecidable manual PG 47 0.222 -0.05 1.6
--.RDP.Z. 1987-05-19T22:36:09.50 10.0 undecidable manual SG 349 0.0444 0.14 0.5
--.RMP.Z. 1987-05-19T22:36:08.50 10.0 undecidable manual PG 349 0.0999 0.14 1.1
--.RDP.Z. 1987-05-19T22:36:07.50 10.0 undecidable manual PG 349 0.0444 -0.11 1.5
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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