Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.4 on date 11-08-2018 and time 04:34:24 (Italy) in region 4 km SW Bolognola (MC)

A magnitude ML 0.4 earthquake occured in region: 4 km SW Bolognola (MC), on

  • 11-08-2018 02:34:24 (UTC)
  • 11-08-2018 04:34:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9710, 13.2000 at 14 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
Bolognola MC 4 142 142
Ussita MC 6 444 586
Acquacanina MC 7 121 707
Fiastra MC 8 559 1266
Castelsantangelo sul Nera MC 9 281 1547
Visso MC 10 1107 2654
Sarnano MC 11 3264 5918
Fiordimonte MC 12 202 6120
Montefortino FM 12 1178 7298
Amandola FM 13 3629 10927
Montemonaco AP 13 604 11531
Pievebovigliana MC 14 866 12397
Pieve Torina MC 15 1458 13855
Gualdo MC 16 815 14670
Cessapalombo MC 16 512 15182
Monte Cavallo MC 16 145 15327
Preci PG 17 724 16051
Comunanza AP 18 3166 19217
Muccia MC 18 915 20132
Montegallo AP 18 523 20655
San Ginesio MC 18 3498 24153
Camporotondo di Fiastrone MC 19 563 24716
Caldarola MC 19 1823 26539

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
54 Km NW of Teramo (54892 inhabitants)
64 Km NE of Terni (111501 inhabitants)
68 Km E of Perugia (166134 inhabitants)
71 Km N of L'Aquila (69753 inhabitants)
76 Km SW of Ancona (100861 inhabitants)
93 Km NW of Montesilvano (53738 inhabitants)
98 Km S of Fano (60888 inhabitants)
100 Km NW of Pescara (121014 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 		ML 0.4 2018-08-11
02:34:24		 42.9712 13.1997 14 2019-04-24
14:50:52		 Bollettino Sismico Italiano INGV 59665491
Reviewed
Rev100 		ML 1.0 2018-08-11
02:34:25		 42.9682 13.2007 13 2018-08-11
02:40:40		 Sala Sismica INGV-Roma 59614521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-11 02:34:24 ± 0.13
Latitude 42.9712 ± 0.0045
Longitude 13.1997 ± 0.0061
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 59665491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 543
Semi-minor axis of confidence ellipse (meter) 203
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.06025
Epicentral distance of station farthest from the epicenter (degree) 0.45686
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.4

Field Value
Value 0.4
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 59665491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-08-12 09:57:10

ML:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 59614521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-11 02:40:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.TERO.HHZ. 2018-08-11T02:34:41.45 0.1 undecidable manual S 139 50.7159 95 0.44 86
IV.SMA1.EHZ. 2018-08-11T02:34:38.28 0.6 undecidable manual S 164 39.3273 97 0.29 45
IV.MML1.HNZ. 2018-08-11T02:34:34.20 0.3 undecidable manual S 311 24.3534 105 0.17 71
IV.TERO.HHZ. 2018-08-11T02:34:34.11 0.3 undecidable manual P 139 50.7159 95 -0.12 68
IV.CESI.HHZ. 2018-08-11T02:34:34.32 0.3 undecidable manual S 279 24.2535 105 0.31 69
IV.MF5.EHZ. 2018-08-11T02:34:33.74 0.3 undecidable manual S 85 21.1677 109 0.5 67
IV.SMA1.EHZ. 2018-08-11T02:34:32.16 0.1 undecidable manual P 164 39.3273 97 -0.32 89
IV.CSP1.EHZ. 2018-08-11T02:34:31.20 0.3 undecidable manual S 2 13.3755 126 -0.18 72
IV.NRCA.HHZ. 2018-08-11T02:34:31.92 0.3 undecidable manual S 204 16.7721 117 -0.23 72
IV.MC2.EHZ. 2018-08-11T02:34:30.30 0.3 undecidable manual S 187 6.6933 149 0.15 73
IV.MMO1.EHZ. 2018-08-11T02:34:30.89 0.1 undecidable manual S 128 13.0758 127 -0.41 91
IV.FDMO.HHZ. 2018-08-11T02:34:30.76 0.6 undecidable manual S 309 11.6772 131 -0.25 48
IV.MML1.HNZ. 2018-08-11T02:34:30.27 0.1 undecidable manual P 311 24.3534 105 0.07 97
IV.CESI.HHZ. 2018-08-11T02:34:30.29 0.1 undecidable manual P 279 24.2535 105 0.1 96
IV.NRCA.HHZ. 2018-08-11T02:34:29.03 0.1 undecidable manual P 204 16.7721 117 -0.08 98
IV.MF5.EHZ. 2018-08-11T02:34:29.86 0.1 undecidable manual P 85 21.1677 109 0.12 97
IV.MC2.EHZ. 2018-08-11T02:34:28.01 0.1 undecidable manual P 187 6.6933 149 0.05 100
IV.MMO1.EHZ. 2018-08-11T02:34:28.41 0.1 undecidable manual P 128 13.0758 127 -0.22 95
IV.FDMO.HHZ. 2018-08-11T02:34:28.37 0.3 undecidable manual P 309 11.6772 131 -0.09 74
IV.CSP1.EHZ. 2018-08-11T02:34:28.57 0.1 undecidable manual P 2 13.3755 126 -0.1 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHE. ML:0.7 0.00002855 0.16 AML other m 2018-08-11T02:34:34.66
IV.CSP1.EHE. ML:0.6 0.00003357586 0.16 AML other m 2018-08-11T02:34:31.38
IV.CSP1.EHN. ML:0.7 0.000046355270000000005 0.0992 AML other m 2018-08-11T02:34:31.21
IV.SMA1.EHE. ML:0.2 0.0000054858935 0.48 AML other m 2018-08-11T02:34:38.25
IV.SMA1.EHN. ML:0.2 0.00000717452 0.12 AML other m 2018-08-11T02:34:38.53
IV.TERO.HHN. ML:0.3 0.000005731075 0.1792 AML other m 2018-08-11T02:34:42.50
IV.TERO.HHE. ML:0.3 0.000006228205 0.1392 AML other m 2018-08-11T02:34:42.50
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