Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 17-08-2018 and time 20:00:20 (Italy) in region Costa Marchigiana Anconetana (Ancona)

A magnitude ML 2.1 earthquake occured in region: Costa Marchigiana Anconetana (Ancona), on

  • 17-08-2018 18:00:20 (UTC)
  • 17-08-2018 20:00:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6900, 13.5400 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
Ancona AN 8 100861 100861
Falconara Marittima AN 14 26565 127426
Camerano AN 18 7322 134748
Montemarciano AN 19 9992 144740
Sirolo AN 19 4051 148791
Camerata Picena AN 19 2567 151358
Offagna AN 20 1935 153293
Chiaravalle AN 20 14796 168089

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km N of Ancona (100861 inhabitants)
45 Km E of Fano (60888 inhabitants)
56 Km E of Pesaro (94582 inhabitants)
88 Km E of Rimini (147750 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 2.1 2018-08-17
18:00:20		 43.6898 13.5395 10 2019-04-24
14:51:09		 Bollettino Sismico Italiano INGV 66055541
Reviewed
Rev100 		ML 2.0 2018-08-17
18:00:20		 43.6992 13.5277 10 2018-08-17
18:11:15		 Sala Sismica INGV-Roma 59868481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-17 18:00:20 ± 0.26
Latitude 43.6898 ± 0.0126
Longitude 13.5395 ± 0.0162
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66055541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1741
Semi-minor axis of confidence ellipse (meter) 701
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 42
Circular confidence region, given by single value of horizontal uncertainty (meter) 1740.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 248
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.08184
Epicentral distance of station farthest from the epicenter (degree) 0.85076
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 66055541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-02 10:34:48

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 59868481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-17 18:11:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2018-08-17T18:00:45.40 0.3 undecidable manual S 207 81.1521 50 0.99 52
IV.EL6.EHZ. 2018-08-17T18:00:37.10 0.3 undecidable manual S 222 53.3022 50 0.12 70
IV.MURB.HHZ. 2018-08-17T18:00:36.42 0.6 undecidable manual P 240 94.4388 50 0.22 43
IV.ARVD.HHZ. 2018-08-17T18:00:36.70 0.3 undecidable manual S 246 52.503 50 -0.08 72
IV.PIEI.HHZ. 2018-08-17T18:00:35.27 0.6 undecidable manual P 258 82.4508 50 0.92 35
IV.MF5.EHZ. 2018-08-17T18:00:34.34 0.1 undecidable manual P 185 78.1662 50 0.65 82
IV.CING.HHZ. 2018-08-17T18:00:34.30 0.3 undecidable manual S 219 44.5221 50 -0.34 68
IV.ATSC.EHE. 2018-08-17T18:00:33.16 0.3 undecidable manual P 247 74.6697 50 0.01 69
IV.FDMO.HHZ. 2018-08-17T18:00:33.81 0.1 undecidable manual P 207 81.1521 50 -0.34 84
IV.FRON.EHZ. 2018-08-17T18:00:32.01 0.3 undecidable manual P 254 68.0763 50 -0.13 68
IV.SSFR.HHN. 2018-08-17T18:00:31.84 0.3 undecidable manual P 245 67.0773 50 -0.14 68
IV.MPAG.EHZ. 2018-08-17T18:00:31.17 0.3 undecidable manual P 264 62.9925 50 -0.17 68
IV.PF6.EHN. 2018-08-17T18:00:31.75 0.1 undecidable manual P 205 67.2771 50 -0.26 87
IV.ARVD.HHZ. 2018-08-17T18:00:29.48 0.1 undecidable manual P 246 52.503 50 -0.26 91
IV.EL6.EHZ. 2018-08-17T18:00:29.62 0.1 negative manual P 222 53.3022 50 -0.24 91
IV.SENI.EHZ. 2018-08-17T18:00:29.70 0.3 undecidable manual S 274 24.6531 50 0.37 61
IV.MMUR.HNE. 2018-08-17T18:00:29.55 0.3 undecidable manual P 238 51.5151 50 -0.04 72
IV.CING.HHZ. 2018-08-17T18:00:28.23 0.1 negative manual P 219 44.5221 50 -0.27 91
IV.AOI.HHE. 2018-08-17T18:00:26.80 0.6 undecidable manual S 162 16.2726 122 -0.01 51
IV.SENI.EHZ. 2018-08-17T18:00:25.55 0.1 undecidable manual P 274 24.6531 50 0.11 95
IV.AOI.HHE. 2018-08-17T18:00:24.12 0.1 undecidable manual P 162 16.2726 122 0.14 100
IV.PCRO.HNE. 2018-08-17T18:00:24.50 0.3 undecidable manual S 184 9.0798 138 -0.4 75
IV.PCRO.HNE. 2018-08-17T18:00:22.98 0.1 undecidable manual P 184 9.0798 138 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SENI.HNE. ML:2.7 0.0027934694999999996 0.1536 AML other m 2018-08-17T18:00:32.80
IV.SENI.HNN. ML:2.6 0.0024317394999999998 0.2816 AML other m 2018-08-17T18:00:33.98
IV.CING.HHE. ML:2.1 0.00036275625 0.192 AML other m 2018-08-17T18:00:35.19
IV.SENI.EHE. ML:1.9 0.00045047835000000004 0.3712 AML other m 2018-08-17T18:00:36.13
IV.CING.HHN. ML:2.0 0.00027214885 0.1408 AML other m 2018-08-17T18:00:36.70
IV.SENI.EHN. ML:1.7 0.00031515315 0.2048 AML other m 2018-08-17T18:00:36.92
IV.EL6.EHE. ML:2.1 0.0002924195 0.32 AML other m 2018-08-17T18:00:37.31
IV.ARVD.HHN. ML:1.7 0.00012898795 0.1408 AML other m 2018-08-17T18:00:38.18
IV.ARVD.HHE. ML:1.7 0.00013238317999999998 0.1024 AML other m 2018-08-17T18:00:38.43
IV.EL6.EHN. ML:2.0 0.00023086465 0.2432 AML other m 2018-08-17T18:00:40.51
IV.PIEI.HHE. ML:2.0 0.00013107795 0.2432 AML other m 2018-08-17T18:00:47.89
IV.PIEI.HHN. ML:1.8 0.000075189825 0.192 AML other m 2018-08-17T18:00:48.37
IV.MF5.EHN. ML:2.4 0.00039623895 1.4368 AML other m 2018-08-17T18:00:49.28
IV.MF5.EHE. ML:2.3 0.0002717608 0.3072 AML other m 2018-08-17T18:00:49.54
IV.FDMO.HHE. ML:2.0 0.00012895185 0.2048 AML other m 2018-08-17T18:00:50.80
IV.FDMO.HHN. ML:1.9 0.00010932800000000001 0.1792 AML other m 2018-08-17T18:00:50.82
IV.MURB.HNE. ML:2.2 0.00018532325 0.256 AML other m 2018-08-17T18:00:51.48
IV.MURB.HHE. ML:2.3 0.00021868315 0.2816 AML other m 2018-08-17T18:00:52.20
IV.MURB.HNN. ML:2.4 0.0002738215 0.2432 AML other m 2018-08-17T18:00:54.09
IV.MURB.HHN. ML:2.4 0.00028967310000000004 0.2432 AML other m 2018-08-17T18:00:54.09
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
Waveforms Seismic signals in miniseed + resp format Download