Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.2 on date 31-10-2016 and time 18:41:31 (Italy) in region 5 km S Bolognola (MC)

A magnitude ML 2.2 earthquake occured in region: 5 km S Bolognola (MC), on

  • 31-10-2016 17:41:31 (UTC)
  • 31-10-2016 18:41:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9490, 13.2120 at 4 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 5 142 142
Ussita MC 6 444 586
Castelsantangelo sul Nera MC 8 281 867
Acquacanina MC 10 121 988
Visso MC 10 1107 2095
Fiastra MC 11 559 2654
Montefortino FM 11 1178 3832
Montemonaco AP 11 604 4436
Sarnano MC 12 3264 7700
Amandola FM 12 3629 11329
Fiordimonte MC 14 202 11531
Montegallo AP 15 523 12054
Preci PG 16 724 12778
Pievebovigliana MC 16 866 13644
Comunanza AP 17 3166 16810
Gualdo MC 17 815 17625
Pieve Torina MC 17 1458 19083
Monte Cavallo MC 18 145 19228
Cessapalombo MC 18 512 19740
Norcia PG 20 4957 24697
San Ginesio MC 20 3498 28195

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km E of Foligno (57155 inhabitants)
52 Km NW of Teramo (54892 inhabitants)
63 Km NE of Terni (111501 inhabitants)
68 Km N of L'Aquila (69753 inhabitants)
69 Km E of Perugia (166134 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
91 Km NW of Montesilvano (53738 inhabitants)
98 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 2.2 2016-10-31
17:41:31		 42.9488 13.2115 4 2019-02-12
14:03:32		 Bollettino Sismico Italiano INGV 53225841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-10-31 17:41:31 ± 0.19
Latitude 42.9488 ± 0.0036
Longitude 13.2115 ± 0.0061
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 53225841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 510
Semi-minor axis of confidence ellipse (meter) 73
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.18526
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:2.2

Field Value
Value 2.2
Uncertainty 0.4
Num. used stations 16
Type of magnitude ML
Reference to an origin 53225841
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-01-16 12:07:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1241.EHZ. 2016-10-31T17:41:39.06 0.6 undecidable manual S 120 20.5683 101 0.01 50
IV.GUMA.HHZ. 2016-10-31T17:41:38.05 0.6 undecidable manual S 38 16.1727 104 0.51 45
IV.FDMO.HHZ. 2016-10-31T17:41:36.55 0.6 undecidable manual S 314 13.9749 105 -0.28 48
XO.AM05.EHZ. 2016-10-31T17:41:36.29 0.6 undecidable manual S 74 11.877 108 0.16 49
IV.FDMO.HHZ. 2016-10-31T17:41:35.05 0.3 undecidable manual P 314 13.9749 105 0.35 70
IV.T1245.HHZ. 2016-10-31T17:41:35.98 0.6 undecidable manual S 191 10.3785 110 0.34 47
IV.GUMA.HHZ. 2016-10-31T17:41:35.17 0.3 undecidable manual P 38 16.1727 104 0.06 75
IV.MMO1.HNZ. 2016-10-31T17:41:35.79 0.6 undecidable manual S 120 10.878 110 0 51
IV.T1241.EHZ. 2016-10-31T17:41:35.80 0.3 undecidable manual P 120 20.5683 101 -0.18 72
XO.AM05.EHZ. 2016-10-31T17:41:34.22 0.1 undecidable manual P 74 11.877 108 -0.07 100
IV.T1256.HHZ. 2016-10-31T17:41:34.36 0.6 undecidable manual S 10 6.4935 121 -0.05 51
IV.MMO1.HNZ. 2016-10-31T17:41:33.89 0.3 undecidable manual P 120 10.878 110 -0.2 73
IV.T1245.HHZ. 2016-10-31T17:41:33.99 0.6 undecidable manual P 191 10.3785 110 -0.02 51
IV.T1256.HHZ. 2016-10-31T17:41:33.04 0.1 undecidable manual P 10 6.4935 121 -0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.T1256.HHE. ML:0.0 0.005353677 0.4096 AML other m 2016-10-31T17:41:34.96
IV.T1256.HHN. ML:0.0 0.005048266500000001 0.3968 AML other m 2016-10-31T17:41:35.18
IV.T1256.HNN. ML:0.0 0.005515552 0.384 AML other m 2016-10-31T17:41:35.18
IV.T1256.HNE. ML:0.0 0.005311685500000001 0.32 AML other m 2016-10-31T17:41:34.96
IV.T1245.HNE. ML:2.4 0.0047249625 0.1792 AML other m 2016-10-31T17:41:38.05
IV.T1245.HNN. ML:2.5 0.0052373215 0.1792 AML other m 2016-10-31T17:41:38.24
IV.T1245.HHE. ML:2.4 0.004715072 0.192 AML other m 2016-10-31T17:41:38.14
IV.T1245.HHN. ML:2.4 0.0046493965 0.2048 AML other m 2016-10-31T17:41:38.25
XO.AM05.EHE. ML:2.1 0.0020289945 0.0896 AML other m 2016-10-31T17:41:36.47
XO.AM05.HNE. ML:1.5 0.00048053485 0.0896 AML other m 2016-10-31T17:41:36.35
XO.AM05.HNN. ML:1.5 0.0004868548 0.1024 AML other m 2016-10-31T17:41:36.53
XO.AM05.EHN. ML:1.1 0.00019078764999999997 0.0768 AML other m 2016-10-31T17:41:36.51
IV.GUMA.HHE. ML:2.6 0.0039716715 0.384 AML other m 2016-10-31T17:41:38.45
IV.GUMA.HHN. ML:2.4 0.0028906105000000002 0.5376 AML other m 2016-10-31T17:41:39.03
IV.GUMA.HNE. ML:2.5 0.003146482 0.4096 AML other m 2016-10-31T17:41:40.44
IV.GUMA.HNN. ML:2.5 0.003221645 0.3456 AML other m 2016-10-31T17:41:38.30
IV.T1241.EHN. ML:1.9 0.0006006328 0.6272 AML other m 2016-10-31T17:41:45.38
IV.T1241.HNN. ML:1.9 0.00063454595 0.384 AML other m 2016-10-31T17:41:41.56
IV.T1241.EHE. ML:2.0 0.0009006323 0.2816 AML other m 2016-10-31T17:41:42.64
IV.T1241.HNE. ML:2.0 0.00087208815 0.2816 AML other m 2016-10-31T17:41:42.62
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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