Earthquake with magnitude of ML 0.9 on date 01-04-2020 and time 15:08:21 (Italy) in region 3 km W Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 3 km W Accumoli (RI), on

  • 01-04-2020 13:08:21 (UTC)
  • 01-04-2020 15:08:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.21 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.

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 3 667 667
Cittareale RI 8 482 1149
Amatrice RI 9 2657 3806
Arquata del Tronto AP 12 1178 4984
Norcia PG 16 4957 9941
Cascia PG 17 3217 13158
Montereale AQ 18 2581 15739
Acquasanta Terme AP 19 2916 18655
Campotosto AQ 19 542 19197
Capitignano AQ 19 665 19862
Posta RI 20 694 20556
Borbona RI 20 617 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of L'Aquila (69753 inhabitants)
40 Km W of Teramo (54892 inhabitants)
48 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
86 Km W of Pescara (121014 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km W of Chieti (51815 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.9 2020-04-01
13:08:21
42.68 13.21 11 2020-04-01
13:20:20
Sala Sismica INGV-Roma 77760741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-01 13:08:21 ± 0.09
Latitude 42.68 ± 0.00
Longitude 13.21 ± 0.01
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 77760741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 473
Semi-minor axis of confidence ellipse (meter) 443
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 121
Circular confidence region, given by single value of horizontal uncertainty (meter) 470
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 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.10432
Epicentral distance of station farthest from the epicenter (degree) 0.29318
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 15
Type of magnitude ML
Reference to an origin 77760741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-01 13:20:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2020-04-01T13:08:32.27 0.3 undecidable manual S 102 0.2932 50 -0.37 90
IV.MC2.EHE. 2020-04-01T13:08:31.14 0.3 undecidable manual S 356 0.2293 50 0.41 90
IV.LNSS.HHZ. 2020-04-01T13:08:28.20 0.3 undecidable manual S 238 0.1502 122 -0.02 100
IV.NRCA.HHE. 2020-04-01T13:08:28.44 0.3 undecidable manual S 334 0.1673 120 -0.34 93
IV.MTRA.EHZ. 2020-04-01T13:08:28.10 0.6 undecidable manual S 61 0.1538 122 -0.22 64
IV.RM33.EHZ. 2020-04-01T13:08:28.83 0.6 undecidable manual S 180 0.1736 119 -0.18 64
IV.MC2.EHE. 2020-04-01T13:08:27.05 0.6 undecidable manual P 356 0.2293 50 0.28 62
IV.TERO.HHZ. 2020-04-01T13:08:27.67 0.3 undecidable manual P 102 0.2932 50 -0.2 93
IV.SMA1.EHZ. 2020-04-01T13:08:27.14 0.3 undecidable manual S 120 0.1043 132 0.34 94
IV.RM33.EHZ. 2020-04-01T13:08:25.81 0.3 undecidable manual P 180 0.1736 119 0.03 99
IV.LNSS.HHZ. 2020-04-01T13:08:25.33 0.3 undecidable manual P 238 0.1502 122 0 100
IV.NRCA.HHE. 2020-04-01T13:08:25.51 0.6 undecidable manual P 334 0.1673 120 -0.14 65
IV.MTRA.EHZ. 2020-04-01T13:08:25.38 0.3 undecidable manual P 61 0.1538 122 -0.01 100
IV.SMA1.EHZ. 2020-04-01T13:08:24.82 0.3 undecidable manual P 120 0.1043 132 0.32 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0.9 6.289356E-5 0.3776 AML other m 2020-04-01T13:08:28.18
IV.LNSS.HNE. ML:1.2 0.0001367027 0.8 AML other m 2020-04-01T13:08:28.59
IV.LNSS.HNN. ML:1.1 9.83449E-5 1.1968 AML other m 2020-04-01T13:08:29.07
IV.LNSS.HHN. ML:0.7 4.08381E-5 1.76 AML other m 2020-04-01T13:08:25.39
IV.MTRA.HNN. ML:1.1 9.8414145E-5 0.3776 AML other m 2020-04-01T13:08:28.22
IV.MTRA.EHN. ML:0.7 4.1619615E-5 0.16 AML other m 2020-04-01T13:08:28.23
IV.MTRA.HNE. ML:1 8.687327E-5 1.6384 AML other m 2020-04-01T13:08:28.50
IV.MTRA.EHE. ML:0.6 3.431842E-5 0.2176 AML other m 2020-04-01T13:08:29.45
IV.RM33.EHE. ML:0.8 4.7741975E-5 1.9008 AML other m 2020-04-01T13:08:28.44
IV.RM33.HNN. ML:1.2 0.000131973354 0.9024 AML other m 2020-04-01T13:08:25.57
IV.RM33.EHN. ML:0.9 5.60488E-5 1.3184 AML other m 2020-04-01T13:08:29.10
IV.TERO.HHN. ML:0.7 1.837723E-5 2.0992 AML other m 2020-04-01T13:08:32.84
IV.TERO.HNE. ML:1.5 0.00014022135 1.7728 AML other m 2020-04-01T13:08:32.00
IV.TERO.HNN. ML:1.8 0.00025898075 1.3888 AML other m 2020-04-01T13:08:30.19
IV.TERO.HHE. ML:0.8 3.1448635E-5 0.9856 AML other m 2020-04-01T13:08:33.04
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