Earthquake with magnitude of ML 1.4 on date 21-10-2018 and time 09:41:58 (Italy) in region 4 km W Amatrice (RI)

A magnitude ML 1.4 earthquake occured in region: 4 km W Amatrice (RI), on

  • 21-10-2018 07:41:58 (UTC)
  • 21-10-2018 09:41:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.64, 13.25 at 12 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
Amatrice RI 4 2657 2657
Accumoli RI 6 667 3324
Cittareale RI 8 482 3806
Montereale AQ 13 2581 6387
Campotosto AQ 14 542 6929
Capitignano AQ 14 665 7594
Arquata del Tronto AP 15 1178 8772
Borbona RI 17 617 9389
Posta RI 18 694 10083
Acquasanta Terme AP 19 2916 12999

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of L'Aquila (69753 inhabitants)
37 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
97 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 1.4 2018-10-21
07:41:58
42.64 13.25 12 2019-06-04
09:16:14
Bollettino Sismico Italiano INGV 68087371
Rev 100 ML 1.5 2018-10-21
07:41:58
42.64 13.25 13 2018-10-21
07:54:50
Sala Sismica INGV-Roma 62162471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-10-21 07:41:58 ± 0.06
Latitude 42.64 ± 0.00
Longitude 13.25 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 68087371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 519
Semi-minor axis of confidence ellipse (meter) 198
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 203
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 24
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
Epicentral distance of station farthest from the epicenter (degree) 0.44966
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 68087371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-29 11:06:19

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 62162471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-10-21 07:54:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PTRJ.HHZ. 2018-10-21T07:42:46.48 3.0 undecidable manual Sn -4.87 0
IV.PE3.EHZ. 2018-10-21T07:42:39.49 3.0 undecidable manual S -1.59 0
IV.MRB1.HHZ. 2018-10-21T07:42:34.17 3.0 undecidable manual Pg 0.5 0
IV.PE3.EHZ. 2018-10-21T07:42:23.44 3.0 undecidable manual P 0.97 0
IV.PARC.HHZ. 2018-10-21T07:42:20.26 3.0 undecidable manual P -2.98 0
IV.GIGS.HHZ. 2018-10-21T07:42:09.72 0.6 undecidable manual S 128 0.304 94 -0.21 47
IV.TERO.HHZ. 2018-10-21T07:42:08.14 0.3 undecidable manual S 94 0.2608 95 -0.51 66
IV.GAVE.EHZ. 2018-10-21T07:42:08.97 0.6 undecidable manual S 281 0.2662 95 0.17 48
IV.CSP1.EHZ. 2018-10-21T07:42:07.65 0.6 undecidable manual P 356 0.4497 92 0.09 47
IV.FDMO.HHZ. 2018-10-21T07:42:07.23 0.6 undecidable manual P 343 0.411 92 0.33 45
IV.MF5.EHZ. 2018-10-21T07:42:06.69 0.1 undecidable manual P 24 0.3777 93 0.36 90
IV.ARRO.EHZ. 2018-10-21T07:42:06.25 0.6 undecidable manual P 260 0.3615 93 0.19 47
IV.NRCA.HHZ. 2018-10-21T07:42:06.86 0.6 undecidable manual S 332 0.2149 97 -0.44 46
IV.GIGS.HHZ. 2018-10-21T07:42:05.16 0.6 undecidable manual P 128 0.304 94 0.08 48
IV.LNSS.HHZ. 2018-10-21T07:42:05.52 0.3 undecidable manual S 255 0.1592 104 -0.15 74
IV.CAMP.HHZ. 2018-10-21T07:42:05.77 0.3 undecidable manual S 132 0.1583 104 0.12 74
IV.FIAM.HHZ. 2018-10-21T07:42:05.99 0.3 undecidable manual P 195 0.3876 93 -0.51 65
IV.RM33.EHZ. 2018-10-21T07:42:05.32 0.3 undecidable manual S 191 0.1367 110 0.3 72
IV.GAVE.EHZ. 2018-10-21T07:42:04.50 0.3 undecidable manual P 281 0.2662 95 0.07 73
IV.TERO.HHZ. 2018-10-21T07:42:04.18 0.1 undecidable manual P 94 0.2608 95 -0.16 96
IV.MC2.EHZ. 2018-10-21T07:42:04.49 0.3 undecidable manual P 351 0.2716 94 -0.04 74
IV.SMA1.EHZ. 2018-10-21T07:42:03.25 0.3 undecidable manual S 101 0.0639 141 -0.03 77
IV.NRCA.HHZ. 2018-10-21T07:42:03.47 0.1 negative manual P 332 0.2149 97 -0.09 98
IV.RM33.EHZ. 2018-10-21T07:42:02.25 0.3 undecidable manual P 191 0.1367 110 0 76
IV.T1299.EHE. 2018-10-21T07:42:02.51 0.3 undecidable manual S 110 0.0252 164 -0.24 74
IV.LNSS.HHZ. 2018-10-21T07:42:02.56 0.3 undecidable manual P 255 0.1592 104 -0.06 75
IV.CAMP.HHZ. 2018-10-21T07:42:02.73 0.1 undecidable manual P 132 0.1583 104 0.12 99
IV.SMA1.EHZ. 2018-10-21T07:42:01.44 0.1 undecidable manual P 101 0.0639 141 0.2 99
IV.T1299.EHE. 2018-10-21T07:42:01.12 0.1 undecidable manual P 110 0.0252 164 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:1.6 0.000372 1.7 AML other m 2018-10-21T07:42:02.00
IV.RM33.EHE. ML:1.5 0.0002655 0.1 AML other m 2018-10-21T07:42:03.19
IV.SMA1.EHN. ML:1.5 0.0004395 0.34 AML other m 2018-10-21T07:42:03.68
IV.SMA1.EHE. ML:1.8 0.000783 0.18 AML other m 2018-10-21T07:42:03.91
IV.LNSS.HHN. ML:1.5 0.0002595 0.12 AML other m 2018-10-21T07:42:06.14
IV.CAMP.HHE. ML:0.7 4.21E-5 0.82 AML other m 2018-10-21T07:42:06.50
IV.LNSS.HHE. ML:1.5 0.0002425 0.46 AML other m 2018-10-21T07:42:06.04
IV.CAMP.HHN. ML:0.8 4.87E-5 0.34 AML other m 2018-10-21T07:42:06.45
IV.NRCA.HHE. ML:1.6 0.000224 0.08 AML other m 2018-10-21T07:42:07.22
IV.NRCA.HHN. ML:1.4 0.0001585 0.12 AML other m 2018-10-21T07:42:07.46
IV.TERO.HHN. ML:1.7 0.000244 0.06 AML other m 2018-10-21T07:42:08.25
IV.TERO.HHE. ML:1.4 0.0001355 0.06 AML other m 2018-10-21T07:42:08.25
IV.GAVE.EHE. ML:1.3 9.12E-5 0.28 AML other m 2018-10-21T07:42:09.41
IV.GAVE.EHN. ML:1.1 6.035E-5 0.58 AML other m 2018-10-21T07:42:10.98
IV.FDMO.HHN. ML:0.7 1.73E-5 0.98 AML other m 2018-10-21T07:42:14.05
IV.FDMO.HHE. ML:0.7 1.72E-5 0.46 AML other m 2018-10-21T07:42:17.37
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