Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 04-08-2019 and time 08:55:21 (Italy) in region 6 km E Amatrice (RI)

A magnitude ML 0.8 earthquake occured in region: 6 km E Amatrice (RI), on

  • 04-08-2019 06:55:21 (UTC)
  • 04-08-2019 08:55:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6360, 13.3650 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Amatrice RI 6 2657 2657
Campotosto AQ 9 542 3199
Accumoli RI 12 667 3866
Cortino TE 12 656 4522
Crognaleto TE 14 1297 5819
Capitignano AQ 14 665 6484
Rocca Santa Maria TE 14 537 7021
Acquasanta Terme AP 15 2916 9937
Valle Castellana TE 16 977 10914
Montereale AQ 16 2581 13495
Arquata del Tronto AP 16 1178 14673
Cittareale RI 17 482 15155
Fano Adriano TE 17 296 15451
Pietracamela TE 20 271 15722

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km W of Teramo (54892 inhabitants)
32 Km N of L'Aquila (69753 inhabitants)
59 Km E of Terni (111501 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
66 Km W of Montesilvano (53738 inhabitants)
72 Km W of Pescara (121014 inhabitants)
73 Km W of Chieti (51815 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
95 Km SE of Perugia (166134 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
Reviewed
Rev100 		ML 0.8 2019-08-04
06:55:21		 42.6365 13.3652 11 2019-08-04
07:01:57		 Sala Sismica INGV-Roma 71156701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-04 06:55:21 ± 0.09
Latitude 42.6365 ± 0.0045
Longitude 13.3652 ± 0.0073
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71156701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 540
Semi-minor axis of confidence ellipse (meter) 460
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 124
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) 96
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26980
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.4
Num. used stations 9
Type of magnitude ML
Reference to an origin 71156701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-04 07:01:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2019-08-04T06:55:36.01 3.0 undecidable manual P 0 0
IV.NRCA.HNZ. 2019-08-04T06:55:31.80 0.1 undecidable manual S 317 29.9478 50 -0.16 96
IV.TERO.HHZ. 2019-08-04T06:55:28.97 0.1 undecidable manual S 94 19.5693 119 -0.21 97
IV.RM33.EHZ. 2019-08-04T06:55:28.83 0.1 undecidable manual S 221 18.7701 120 -0.11 99
IV.MTRA.EHZ. 2019-08-04T06:55:27.33 0.1 undecidable manual S 11 13.5753 128 -0.12 100
IV.NRCA.HNZ. 2019-08-04T06:55:27.54 0.1 undecidable manual P 317 29.9478 50 0.03 99
IV.RM33.EHZ. 2019-08-04T06:55:26.13 1.0 undecidable manual P 221 18.7701 120 0.36 24
IV.TERO.HHZ. 2019-08-04T06:55:26.05 0.1 undecidable manual P 94 19.5693 119 0.14 98
IV.CAMP.HHZ. 2019-08-04T06:55:26.79 0.1 undecidable manual S 162 11.7771 132 -0.17 99
IV.MTRA.EHZ. 2019-08-04T06:55:25.15 0.1 negative manual P 11 13.5753 128 0.24 97
IV.CAMP.HHZ. 2019-08-04T06:55:24.89 0.1 undecidable manual P 162 11.7771 132 0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.1 0.0001234307 0.0992 AML other m 2019-08-04T06:55:27.40
IV.MTRA.EHN. ML:0.9 0.000081126665 0.24 AML other m 2019-08-04T06:55:27.95
IV.MTRA.HNE. ML:1.1 0.00012917728 0.112 AML other m 2019-08-04T06:55:27.45
IV.MTRA.HNN. ML:1.0 0.00010374012 0.2592 AML other m 2019-08-04T06:55:27.95
IV.TERO.HHE. ML:0.3 0.000013034444499999998 0.1024 AML other m 2019-08-04T06:55:29.31
IV.TERO.HHN. ML:0.5 0.000025439175 0.0992 AML other m 2019-08-04T06:55:28.99
IV.RM33.EHE. ML:0.4 0.000019809515 0.2176 AML other m 2019-08-04T06:55:29.17
IV.RM33.EHN. ML:0.3 0.000014075619000000002 0.1792 AML other m 2019-08-04T06:55:29.14
IV.RM33.HNE. ML:1.3 0.000146967285 0.6816 AML other m 2019-08-04T06:55:39.50
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