Earthquake with magnitude of ML 1.6 on date 23-10-2018 and time 13:01:48 (Italy) in region 8 km NW Accumoli (RI)

A magnitude ML 1.6 earthquake occured in region: 8 km NW Accumoli (RI), on

  • 23-10-2018 11:01:48 (UTC)
  • 23-10-2018 13:01:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.75, 13.18 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
Accumoli RI 8 667 667
Norcia PG 9 4957 5624
Arquata del Tronto AP 10 1178 6802
Cascia PG 14 3217 10019
Cittareale RI 15 482 10501
Amatrice RI 16 2657 13158
Montegallo AP 16 523 13681
Castelsantangelo sul Nera MC 16 281 13962
Preci PG 19 724 14686
Acquasanta Terme AP 19 2916 17602

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km W of Teramo (54892 inhabitants)
45 Km SE of Foligno (57155 inhabitants)
48 Km NW of L'Aquila (69753 inhabitants)
48 Km E of Terni (111501 inhabitants)
76 Km SE of Perugia (166134 inhabitants)
83 Km W of Montesilvano (53738 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Chieti (51815 inhabitants)
93 Km NE of Tivoli (56533 inhabitants)
96 Km E of Viterbo (67173 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
Rev 1000 ML 1.6 2018-10-23
11:01:48
42.75 13.18 10 2019-06-04
09:15:59
Bollettino Sismico Italiano INGV 62613601
Rev 100 ML 1.6 2018-10-23
11:01:48
42.75 13.18 10 2018-10-23
11:07:28
Sala Sismica INGV-Roma 62246621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-10-23 11:01:48 ± 0.05
Latitude 42.75 ± 0.00
Longitude 13.18 ± 0.00
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 62613601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 383
Semi-minor axis of confidence ellipse (meter) 214
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 64
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3948
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 13
Type of magnitude ML
Reference to an origin 62613601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-12-05 16:13:20

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 62246621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-10-23 11:07:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.INTR.HHZ. 2018-10-23T11:02:08.26 3.0 undecidable manual P 0
IV.VVLD.HHZ. 2018-10-23T11:02:06.00 3.0 undecidable manual P 0
IV.EL6.EHZ. 2018-10-23T11:02:02.68 3.0 undecidable manual P 0
IV.TERO.HHZ. 2018-10-23T11:02:01.21 0.3 undecidable manual S 112 0.3345 50 -0.19 70
IV.GUMA.HHZ. 2018-10-23T11:02:01.86 0.6 undecidable manual S 20 0.3327 50 0.52 43
IV.CESI.HHE. 2018-10-23T11:02:01.08 0.6 undecidable manual S 322 0.3265 50 -0.07 48
IV.FDMO.HHZ. 2018-10-23T11:02:00.21 0.6 undecidable manual S 346 0.295 50 -0.01 49
IV.CAMP.HHE. 2018-10-23T11:01:59.34 0.6 undecidable manual S 142 0.2707 50 -0.16 48
IV.RM33.EHZ. 2018-10-23T11:01:58.74 0.6 undecidable manual S 174 0.241 50 0.12 48
IV.MML1.HNE. 2018-10-23T11:01:57.04 0.3 undecidable manual P 337 0.3948 50 -0.08 71
IV.MF5.EHZ. 2018-10-23T11:01:56.07 0.3 undecidable manual P 40 0.3139 50 0.35 68
IV.GUMA.HHZ. 2018-10-23T11:01:56.34 0.3 undecidable manual P 20 0.3327 50 0.29 69
IV.MC2.EHZ. 2018-10-23T11:01:56.15 0.3 undecidable manual S 2 0.1619 120 0.14 73
IV.MMO1.EHZ. 2018-10-23T11:01:56.52 0.3 undecidable manual S 35 0.1844 117 -0.23 72
IV.ARRO.EHZ. 2018-10-23T11:01:56.09 0.3 undecidable manual P 241 0.3498 50 -0.25 69
IV.MTRA.EHZ. 2018-10-23T11:01:55.63 0.6 undecidable manual S 87 0.1583 120 -0.23 48
IV.CESI.HHE. 2018-10-23T11:01:55.84 0.1 undecidable manual P 322 0.3265 50 -0.1 95
IV.FDMO.HHZ. 2018-10-23T11:01:55.23 0.1 undecidable manual P 346 0.295 50 -0.18 94
IV.TERO.HHZ. 2018-10-23T11:01:55.96 0.3 undecidable manual P 112 0.3345 50 -0.12 71
IV.RM33.EHZ. 2018-10-23T11:01:54.51 0.1 undecidable manual P 174 0.241 50 0.03 98
IV.CAMP.HHE. 2018-10-23T11:01:54.91 0.1 undecidable manual P 142 0.2707 50 -0.08 97
IV.MMO1.EHZ. 2018-10-23T11:01:53.34 0.1 negative manual P 35 0.1844 117 -0.06 99
IV.LNSS.HHZ. 2018-10-23T11:01:53.44 0.1 undecidable manual P 215 0.179 117 0.14 97
IV.MC2.EHZ. 2018-10-23T11:01:53.12 0.3 undecidable manual P 2 0.1619 120 0.15 73
IV.NRCA.HHZ. 2018-10-23T11:01:53.69 0.3 undecidable manual S 330 0.098 133 -0.3 72
IV.MTRA.EHZ. 2018-10-23T11:01:52.86 0.1 undecidable manual P 87 0.1583 120 -0.03 100
IV.T1299.HNN. 2018-10-23T11:01:52.92 0.3 undecidable manual P 147 0.1367 124 0.44 69
IV.NRCA.HHZ. 2018-10-23T11:01:51.91 0.1 negative manual P 330 0.098 133 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.7 0.00056381795 0.0768 AML other m 2018-10-23T11:01:53.87
IV.NRCA.HNN. ML:1.6 0.0005066199 0.096 AML other m 2018-10-23T11:01:53.80
IV.NRCA.HHN. ML:1.7 0.00057690265 0.1024 AML other m 2018-10-23T11:01:53.75
IV.NRCA.HHE. ML:1.7 0.0005920197 0.0832 AML other m 2018-10-23T11:01:53.87
IV.MTRA.EHE. ML:1.6 0.0003166399 0.1792 AML other m 2018-10-23T11:01:56.28
IV.MTRA.EHN. ML:1.6 0.0003729348 0.1408 AML other m 2018-10-23T11:01:56.18
IV.MTRA.HNE. ML:1.6 0.000336277 0.1792 AML other m 2018-10-23T11:01:56.18
IV.MTRA.HNN. ML:1.6 0.00037244615 0.1536 AML other m 2018-10-23T11:01:56.10
IV.RM33.EHE. ML:1.1 7.1921057E-5 0.2368 AML other m 2018-10-23T11:01:58.89
IV.RM33.EHN. ML:1 5.7904935E-5 0.16 AML other m 2018-10-23T11:01:59.62
IV.FDMO.HHE. ML:0.9 3.2702915E-5 0.1792 AML other m 2018-10-23T11:02:01.47
IV.FDMO.HHN. ML:1 4.4949168E-5 0.32 AML other m 2018-10-23T11:02:00.67
IV.TERO.HHN. ML:1.2 6.6776085E-5 0.1216 AML other m 2018-10-23T11:02:01.40
IV.ARRO.EHE. ML:0.8 2.7248515E-5 0.2752 AML other m 2018-10-23T11:02:05.17
IV.ARRO.EHN. ML:0.8 2.389742E-5 0.2176 AML other m 2018-10-23T11:02:03.48
IV.GUMA.HNN. ML:2.2 0.0006459788 1.3824 AML other m 2018-10-23T11:02:01.16
IV.GUMA.HHN. ML:1.6 0.0001597106 0.896 AML other m 2018-10-23T11:02:04.94
IV.GUMA.HNE. ML:1.5 0.000131291595 0.2816 AML other m 2018-10-23T11:02:03.54
IV.GUMA.HHE. ML:1.7 0.00017905365 0.2432 AML other m 2018-10-23T11:02:02.28
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download