Earthquake 2 km S Montasola (RI), Magnitude Md 2.3, 30 May 1985 time 19:46:30 (Timezone UTC)

A magnitude Md 2.3 earthquake occured in region: 2 km S Montasola (RI), on

30-05-1985 19:46:30 (UTC)
30-05-1985 21:46:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.3680, 12.6840 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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Display location by

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).

Municipality	Region	Distance (km)	Inhabitants	Cumulative Inhabitants
Montasola	RI	2	395	395
Casperia	RI	3	1246	1641
Torri in Sabina	RI	4	1256	2897
Cottanello	RI	4	563	3460
Vacone	RI	4	256	3716
Roccantica	RI	5	563	4279
Montebuono	RI	7	883	5162
Configni	RI	7	633	5795
Selci	RI	7	1106	6901
Cantalupo in Sabina	RI	7	1685	8586
Tarano	RI	7	1444	10030
Poggio Catino	RI	8	1341	11371
Contigliano	RI	8	3783	15154
Monte San Giovanni in Sabina	RI	9	714	15868
Calvi dell'Umbria	TR	10	1856	17724
Forano	RI	11	3179	20903
Collevecchio	RI	11	1577	22480
Poggio Mirteto	RI	11	6315	28795
Greccio	RI	12	1558	30353
Stimigliano	RI	12	2328	32681
Salisano	RI	13	567	33248
Montopoli di Sabina	RI	14	4210	37458
Filacciano	RM	14	477	37935
Montenero Sabino	RI	14	299	38234
Mompeo	RI	14	530	38764
Stroncone	TR	15	4917	43681
Ponzano Romano	RM	15	1155	44836
Rieti	RI	15	47698	92534
Torrita Tiberina	RM	16	1089	93623
Castelnuovo di Farfa	RI	16	1059	94682
Casaprota	RI	16	744	95426
Magliano Sabina	RI	17	3774	99200
Colli sul Velino	RI	17	533	99733
Nazzano	RM	17	1436	101169
Otricoli	TR	18	1869	103038
Fara in Sabina	RI	18	13742	116780
Belmonte in Sabina	RI	18	636	117416
Toffia	RI	18	1058	118474
Frasso Sabino	RI	18	743	119217
Poggio San Lorenzo	RI	18	589	119806
Poggio Nativo	RI	19	2622	122428
Torricella in Sabina	RI	19	1342	123770
Sant'Oreste	RM	20	3687	127457

Municipalities with at least 50000 inhabitants

An earthquake occurred to

22 Km S of Terni (111501 inhabitants)

41 Km N of Guidonia Montecelio (88673 inhabitants)

46 Km N of Tivoli (56533 inhabitants)

48 Km E of Viterbo (67173 inhabitants)

55 Km NE of Roma (2864731 inhabitants)

59 Km W of L'Aquila (69753 inhabitants)

66 Km S of Foligno (57155 inhabitants)

76 Km NE of Fiumicino (78395 inhabitants)

76 Km N of Velletri (53303 inhabitants)

79 Km N of Pomezia (62966 inhabitants)

79 Km E of Civitavecchia (52991 inhabitants)

86 Km S of Perugia (166134 inhabitants)

86 Km N of Aprilia (73446 inhabitants)

90 Km W of Teramo (54892 inhabitants)

Recent and historical seismicity

Not available maps for this sismic event.

Seismic hazard

Not available maps for this sismic event.

Shakemap

Not available maps for this sismic event.

Felt maps

Not available maps for this sismic event.

Locations history

Type	Magnitude	Date and Time (UTC)	Latitude	Longitude	Depth (km)	Published time (UTC)	Author	Location ID
Bulletin Rev1000	Md 2.3	1985-05-30 19:46:30	42.368	12.684	10	2013-07-15 08:41:04	Bollettino Sismico Italiano INGV	7649

Preferred location and magnitude until now.

Origin information

Origin

Field	Value
Time (UTC)	1985-05-30 19:46:30 ± 0.322
Latitude	42.3680 ± 0.0159
Longitude	12.6840 ± 0.0138
Depth (km)	10 (operator assigned)
Evaluation mode of Origin	manual
Evaluation status of Origin	reviewed
Version	1000 -> BULLETIN-VAX
Event type	earthquake
Origin ID	7649

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)	2098.0
Confidence level of the uncertainty (%)	68

Quality

Field	Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)	315
Number of associated phases, regardless of their use for origin computation	5
Number of defining phases	5
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)	0.00251
Epicentral distance of station farthest from the epicenter (degree)	0.01028
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:2.3

Field	Value
Value	2.3
Uncertainty
Num. used stations	2
Type of magnitude	Md
Reference to an origin	7649
Agency	INGV
Autore	Bollettino Sismico Italiano INGV
Time of creation (UTC)	2013-01-04 17:11:49

Picking and Arrival

SCNL	Time	Uncertainty	Polarity	Evaluation_mode	Phase	Azimuth	Distance(km)	Residual	Weight
--.AS1.Z.	1985-05-30T19:46:54.00	10.0	undecidable	manual	SG	358	0.6882	-0.21	0.4
--.AR1.Z.	1985-05-30T19:46:52.00	10.0	undecidable	manual	PN?	9	1.1433	0.22	0.3
--.AS1.Z.	1985-05-30T19:46:44.00	10.0	undecidable	manual	PG	358	0.6882	0.02	2.4
--.PO9.Z.	1985-05-30T19:46:41.10	10.0	undecidable	manual	SG	42	0.2775	0.18	0.6
--.PO9.Z.	1985-05-30T19:46:36.10	10.0	undecidable	manual	PG	42	0.2775	-0.2	1.2

TDMT - Time Domain Moment Tensor

Not available TDMT solution for this seismic event.

Fault Plane solutions in the area

Not available maps for this sismic event.

Download

Type	Description	Link
QuakeML - small	Event, Origin, FocalMechanism	Download
QuakeML - full	Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude	Download

Earthquake with magnitude of Md 2.3 on date 30-05-1985 and time 19:46:30 (UTC) in region 2 km S Montasola (RI)

Municipalities within 20 km from the epicenter

Municipalities with at least 50000 inhabitants

Origin

Uncertainty

Quality

Md:2.3