Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 12-08-2020 and time 09:44:01 (UTC) in region 4 km E Amatrice (RI)

A magnitude ML 0.7 earthquake occured in region: 4 km E Amatrice (RI), on

  • 12-08-2020 09:44:01 (UTC)
  • 12-08-2020 11:44:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6400, 13.3420 at 14 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 5 2657 2657
Campotosto AQ 9 542 3199
Accumoli RI 10 667 3866
Capitignano AQ 14 665 4531
Cortino TE 14 656 5187
Cittareale RI 15 482 5669
Montereale AQ 15 2581 8250
Crognaleto TE 15 1297 9547
Arquata del Tronto AP 15 1178 10725
Acquasanta Terme AP 16 2916 13641
Rocca Santa Maria TE 16 537 14178
Valle Castellana TE 17 977 15155
Fano Adriano TE 19 296 15451

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km W of Teramo (54892 inhabitants)
32 Km N of L'Aquila (69753 inhabitants)
58 Km E of Terni (111501 inhabitants)
63 Km SE of Foligno (57155 inhabitants)
68 Km W of Montesilvano (53738 inhabitants)
74 Km W of Pescara (121014 inhabitants)
75 Km W of Chieti (51815 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
94 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 0.7 2020-08-12
09:44:01		 42.6402 13.3422 14 2020-08-12
09:57:25		 Sala Sismica INGV-Roma 81902571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-12 09:44:01 ± 0.07
Latitude 42.6402 ± 0.0027
Longitude 13.3422 ± 0.0049
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81902571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 62
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25541
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 81902571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-12 09:57:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2020-08-12T09:45:36.02 3.0 undecidable manual Sg 8.41 0
SI.ROSI.HHZ. 2020-08-12T09:45:20.51 3.0 undecidable manual Pg 14.95 0
GU.CANO.HHZ. 2020-08-12T09:45:18.04 3.0 undecidable manual Pg 19.85 0
IV.NDIM.HNZ. 2020-08-12T09:45:18.24 3.0 undecidable manual Sn 1.88 0
IV.MILN.HNZ. 2020-08-12T09:45:11.93 3.0 undecidable manual Pg 12.43 0
IV.SARZ.HHZ. 2020-08-12T09:45:04.44 3.0 negative manual Pn 7.83 0
CH.FUORN.HHZ. 2020-08-12T09:45:00.88 3.0 undecidable manual Pn -5.05 0
IV.AGLI.HHZ. 2020-08-12T09:44:59.13 3.0 undecidable manual Pg 9.32 0
IV.IMOL.HNZ. 2020-08-12T09:44:57.45 3.0 undecidable manual Sn 0.08 0
IV.FREG.EHZ. 2020-08-12T09:44:51.85 3.0 undecidable manual Pn 0.61 0
IV.MIGL.HHZ. 2020-08-12T09:44:42.96 3.0 negative manual Pn -3.51 0
TV.SF01.EHZ. 2020-08-12T09:44:39.71 3.0 undecidable manual Sn 2.35 0
IV.MRLC.HHZ. 2020-08-12T09:44:38.51 3.0 positive manual Pg 0.63 0
IV.CRTC.HHZ. 2020-08-12T09:44:36.63 3.0 undecidable manual Sg 0.51 0
IV.FIR.HHZ. 2020-08-12T09:44:30.45 3.0 undecidable manual Pn 1.33 0
IT.FIE.HGZ. 2020-08-12T09:44:26.55 3.0 undecidable manual Pn -2.55 0
IV.FOSV.EHZ. 2020-08-12T09:44:15.79 3.0 undecidable manual Pg 1.57 0
IV.ARVD.HHZ. 2020-08-12T09:44:14.40 3.0 positive manual Pn -1.83 0
IV.FOPC.HGZ. 2020-08-12T09:44:13.30 3.0 undecidable manual S 0
IV.GIGS.HHZ. 2020-08-12T09:44:11.53 0.3 undecidable manual S 138 28.0497 99 -0.11 73
IV.NRCA.HHE. 2020-08-12T09:44:11.52 0.3 undecidable manual S 319 28.3494 99 -0.21 71
IT.FOPC.HGZ. 2020-08-12T09:44:10.61 3.0 undecidable manual P -0.17 0
IV.TERO.HHZ. 2020-08-12T09:44:09.86 0.6 undecidable manual S 95 21.4674 105 -0.06 49
IV.RM33.EHZ. 2020-08-12T09:44:08.99 0.6 undecidable manual S 216 17.871 111 -0.03 50
IV.GIGS.HHZ. 2020-08-12T09:44:07.33 0.1 undecidable manual P 138 28.0497 99 -0.09 97
IV.NRCA.HHE. 2020-08-12T09:44:07.53 0.1 undecidable manual P 319 28.3494 99 0.06 100
IV.MTRA.EHZ. 2020-08-12T09:44:07.93 0.6 undecidable manual S 19 13.6752 121 -0.07 50
IV.RM33.EHZ. 2020-08-12T09:44:06.02 0.1 undecidable manual P 216 17.871 111 0.12 100
IV.SMA1.EHZ. 2020-08-12T09:44:06.05 0.6 undecidable manual S 208 1.1988 174 -0.11 51
IV.TERO.HHZ. 2020-08-12T09:44:06.56 1.0 undecidable manual P 95 21.4674 105 0.13 25
IV.MTRA.EHZ. 2020-08-12T09:44:05.49 0.1 positive manual P 19 13.6752 121 0.17 100
IV.SMA1.EHZ. 2020-08-12T09:44:04.51 1.0 undecidable manual P 208 1.1988 174 0.26 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.7 0.00006615 0.18 AML other m 2020-08-12T09:44:06.34
IV.SMA1.EHE. ML:0.6 0.000049850000000000006 0.16 AML other m 2020-08-12T09:44:06.42
IV.MTRA.EHN. ML:0.8 0.0000615 0.5 AML other m 2020-08-12T09:44:08.00
IV.MTRA.EHE. ML:0.8 0.000048549999999999994 0.16 AML other m 2020-08-12T09:44:08.43
IV.RM33.EHN. ML:0.7 0.000034049999999999994 0.34 AML other m 2020-08-12T09:44:09.23
IV.RM33.EHE. ML:0.5 0.0000269 0.62 AML other m 2020-08-12T09:44:09.44
IV.TERO.HHN. ML:0.8 0.00003835 0.84 AML other m 2020-08-12T09:44:10.61
IV.TERO.HHE. ML:0.6 0.00002385 0.06 AML other m 2020-08-12T09:44:10.45
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